· Kai and Nya are two surviving orphan brothers after the coup d'etat of the king and the inhabitants of Ninjago. Their parents hid them while they tried to help some of the inhabitants, but they mysteriously disappeared and since then the two brothers considered them dead after not knowing more about them. One of the king's guards gave Kai a large scar on his left eye after he tried to attack them, but they were saved by the resistance leader, Garmadon, who was good friends with his parents Ray and Maya. Garmadon found them and from then on he took care of both of them.

· Kai is five years older than Nya, the unfortunate events occurred when they were six and one years old, after seeing the great destruction caused by the royal guards of the king and the inhabitants of Ninjago with their wars, Kai grew up with great resentment. towards the inhabitants of Ninjago after they left several homeless people and families destroyed by their absurd civil war against the king, this hatred was also adopted by some of the inhabitants of the underground and acquaintances of the old resistance, but Garmadon was the only one to make him see that not all people in Ninjago were bad, he even helped him control his hatred while he grew up, more apart from helping him defend himself and survive in the city, also taking care of his sister is his highest priority and only responsibility She is everything to him, losing her would devastate him.

· Nya was only a baby when she lost her parents and when the devastating events occurred, so she doesn't remember much about that day, only having flashes of those events in her dreams. The only memory of his parents that he could keep was a medallion that was a gift from his father, Kai also has one, and both medallions have two different symbols, which for the former are two symbols that mean fire and water. Nya has the symbol of water while Kai has that of fire, the medallions also have the same photo that shows their entire family, in the photo Nya was a newborn and Kai was five years old. Nya grew up copying her older brother and Garmadon, but because she was little she almost always stayed in her lair under the care of some members of the resistance or Garmadon himself while she helped him at the bar to serve drinks. Her only wish is to travel beyond Ninjago City and the Underground and find a home for her and her brother.

· What makes these brothers special is their ability to create Arcadian magic, they don't know who they inherited it from or why they can do it, even Garmadon didn't know that Ray and Maya had Arcadian powers. Ray and Maya inherited their powers to their children, both could manifest their powers in their own way, Kai seemed to be able to create fire and apply it to his different weapons and Nya could create something related to water, even if she controlled it well she could be able to heal some wounds. Ray and Maya kept their powers a secret to protect themselves and their children. Also Kai's magic appears to be red in color and Nya's is navy blue. Kai usually uses his powers to peel and apply them to his knives or swords, and Nya uses her powers to be able to heal some of Kai's wounds and to maintain a large supply of water in her lair and for stamina.

· Kai and Nya's parents were descendants of the First Ones, and they have told their children stories of the First Empire, Kai just thought they were just bedtime stories for children, they lived in the mines of Ninjago while working as blacksmiths, when the disputes of the king against his people Ray and Maya met Garmadon and joined his resistance, since then Garmadon has been considered part of his family and that is why he decided to take care of Kai and Nya when Ray and Maya got lost. The secret of Kai and Nya's powers is only known by Garmadon and his family, his wife Misako and his younger brother Wu, and Garmadon also helped the brothers to control their powers well.

· Garmadon was the leader of the resistance against the king's royal guard during the coup, before the events Garmadon lived peacefully together with his wife Misako and his brother Wu, they were considered nobles but Garmadon left that life to save the inhabitants of the underground and some inhabitants of the city, so he joined with Ray and Maya and together they created the resistance of the Underground.

· During the battle Garmadon managed to eradicate the royal guard on one of the bridges connected from Ninajgo to the Underground, that was also where he saw Ray and Maya for the last time and where he found Kai and Nya, but that event earned the respect of the Ninajgo underground dwellers of his safe zone where he is in charge of keeping order in his district with the help of some ex-resistance members who are still loyal to him.

· After the forces that still followed the king of Ninjago were eradicated, the council was established that helped bring peace back to Ninjago and a new order in the underground, even so the law of Ninjago was not applied in the Underground, several of the territories are controlled by gangs and criminal organizations, but in the area that Garmadon takes care of, peace is established a little thanks to his rules and his men who are in charge of keeping him in order in his district, the area being under Garmadon's guard central, which is the one that controls Garmadon is for the moment safe from other dangerous criminals.

· But Garmadon also receives the help of his brother Wu, who is a sheriff in Ninjago, some of his men are in charge of taking the most dangerous criminals from the area that Garmadon controls, both brothers help each other, Wu provides him with resources and Garmadon helps him provides information on criminals so that he can capture them. Even Wu helps Garmadon sneak in and out of town so he could see Misako at home.

· Garmadon established himself in a well-known bar in his area in order to earn a living and support Kai and Nya, there the one who runs the bar is Pythor, a reptilian humanoid who is in charge of providing clandestine fights in the bar as a means of entertainment, Garmadon made a deal with Pythor, Garmadon would work at Pythor's bar as long as he didn't charge him with the police and would secure the lair of some of his resistance rebels. The tavern is called Slither Pitt, and there the men of Wu are not very well received when they seek information from Garmadon, sometimes Garmadon has to take them to the Ronin item shop to talk in peace, since Ronin is one of his good friends and allies, he is also his second in command.

· Wu is the sheriff of the city of Ninjago, but the one who is higher than him is Krux, the commander of the Ninjago royal guard, but Krux is someone corrupt, Wu suspects that Krux is up to something after interrupting and closing several of the his investigations and cases, Wu suspects that Krux is using his trespassing excuses to take advantage of the criminal businesses Wu investigates. He tries to find out but he doesn't have enough privileges against him since Krux manages to hide his tracks well.

· Wu loves his brother, that's why he promised to take good care of Misako for him, Wu always made sure that Misako had a good life and that she wasn't involved in Garmadon's abandonment in the city, he and his wife Koko live, together her son Morro, they live with her in her mansion so as not to leave her alone.

· Misako's situation almost became difficult after Garmadon decided to live underground so he could hide from what was left of the new royal guard. And she worries a lot when Garmadon sneaks into town so he can be with her. But he knows that at least in the underground things are controlled thanks to Garmadon, he is also proud of him knowing that Kai and Nya are in good hands, since he knows that it would be a risk for the children if they lived in the city due to Its powers.

· Misako lovingly treasures and preserves the letters and photos that Garmadon sends her, just like Garmadon, and thanks to Wu Misako, she improved her profile in society thanks to her incredible historical discoveries and working as a history teacher at the Royal Ninjago Academy.

· Koko and Wu live happily with their son Morro, who wishes to be a member of the Ninjago royal guard and be the strongest warrior of all. He greatly overestimates his peers as he became one of the top students in the city academy.

· Cole Brookstone is a young student who tries to discover the secrets of magic, since he thinks that maybe magic is the answer to many problems that he tries to solve, he has that in mind after experiencing something related to magic after that his family was trying to get away from the city after the coup.

· Cole's family is dedicated to the trade and extraction of minerals based on a mining company that his family owns. His family is not quite tall but still is well seen in the city of Ninjago thanks to its discovered minerals. When the events of the coup d'état occurred, Cole's family fled the city to wait for the danger to pass, but an accident occurred during their journey and they were saved by a mysterious magician, Cole seeing the use of magic tried to discover more about Arcadian magic, since then Cole has studied all kinds of sciences to be able to control magic in some way.

· Jay Walker is the son of some important inventors from the city of Ninjago, although they consider him an outcast because they do not believe he is as good as his parents, since his inventions sometimes fail or go wrong on some occasions, but even so he is a good student at the royal academy, but not that strong in combat training. He's been Cole's best friend for as long as he can remember and ever since Cole told him about magic Jay was more than willing to help him in any way he could.

· Jay's family is made up of many long-time inventors, and his family is familiar with Cole's family as their inventions improve the quality of mining for workers and give them new tools.

· Zane Julien is the son of an important inventor and scientist in the city, Dr. Julien, who invented several of the technologies used by Ninjago and some androids found in the city. Zane is proud of his father, and wants to be just like him by following in his footsteps, since Zane had a serious disease in his heart since he was born, but his father replaced his heart with a power source operated with Arcadian magic that Julien discovered. On one of his trips, thanks to this source of energy, Zane managed to survive his illness and continue with a normal life but when meeting Cole and Jay, he becomes very interested in the subject of magic.

· The only friend Zane has had from the beginning has been Pixal, the only daughter of Cyrus Borg, a member of the Ninjago council and the great inventor of the city. They study at the royal academy together and thanks to her she also meets Jay and Cole during a science class led by Dr. Saunders.

· Wu and Sanders are best friends, Sanders Saunders is a well annealed scientist and professor at the royal academy in Ninjago, as well as being part of the Council, Wu is like his personal guard and even helps him with some of his investigations and cases. Sander sometimes prefers to be called Dr. Saunders than by his real name, as he thinks his name is somewhat weird.

· Dr. Saunders is very supportive of his students, but has great appreciation for his students Cole, Jay, Zane, Skylor, Morro, and Lloyd. Seeing Cole, Jay and Zane use magic as their main study project makes him think that it can be dangerous at the hands of some children, but he was very surprised to see the advances and research that his students have done and that makes such a Maybe I will create that magic can be handled thanks to science.

· Skylor Chen is the only daughter of the famous General Chen, who is also part of the Ninjago Council. Her dream is to be a great heroine for her city as part of the royal guard, but her father is sometimes somewhat overprotective and has treated her like a damsel in distress, Chen prefers that his daughter dedicate herself to other things than battles and training in the royal guard, but it makes him proud to see that his daughter is someone who knows how to defend herself. And as much as it worries him, Chen supports his daughter in her decisions, even letting her go with Wu in some cases.

· Skylor and Morro have had a friendly rivalry for as long as they've known each other, they compete for almost everything and that has sometimes gotten them into trouble. Little Lloyd has been his personal referee ever since. But despite their rivalry, they are, so to speak, best friends. Skylor greatly admires Wu and thanks to him she was included as a subordinate in their ranks in the police, her patrol partner turned out to be Morro, and Wu constantly has to watch them so they don't get into trouble because of their skills. And in the first days as a policeman he managed to capture a large number of criminals and to help solve numerous cases.

· The Ninjago Council is made up of: Chen, Cyrus Borg, Dr. Sanders Saunders, Yang, Vangelis, Mambo V, and Sorla. They are in charge of maintaining order and applying the law in the city of Ninjago, they are in charge of maintaining good relations and businesses throughout the planet. Chen is in charge of the army and defense of the city, as well as enforcing military law in both the royal guard and the police. Sanders and Cyrus are in charge of the study and science in Ninjago, Yang of the church, Vangelis and Mambo V of the commerce and resources for the city and Sorla of the diplomatic and social relations in the allied kingdoms of the city.

· Garmadon trained Kai and Nya so that they could survive anything on the planet of Ninjago, and defend themselves from any danger either on the surface or underground, he taught them all kinds of combat and how to move underground. Also with the help of Ronin, he taught them to handle all kinds of weapons that exist and know, Kai became familiar with swords, knives and small weapons, Nya with long-range weapons and weapons handled only by hand. Ronin even taught them how to steal and deal with idiotic beings. In addition, the two brothers even learned to create tools, vehicles and some machines for their own benefit.

· Kai and Nya usually spend their time living alone, but they always work side by side with their fellow resistance fighters who still serve Garmadon and Ronin, normally they almost always spend their time robbing other gangs and trading ports in the city. There are times when Kai and Skylor go on various chases, despite not yet meeting face to face.

· Kai is an excellent fighter and a great thief, just like Nya, except she wasn't good at fighting yet, but at least she was a good engineer and inventor despite her age. In addition, Nya created an improved training system for Kai and herself. When Nya cannot accompany Kai on missions, she stays with Garmadon to help him at the bar to prepare or deliver drinks to customers, or she also helps him with some repairs on vehicles or machines, or when she has free time she dedicates herself to to make inventions for herself.

· Krux is the commander of the royal army of Ninjago, despite seeing himself as a good man Krux is not really what he pretends to be, his dark secret is that he works alongside his twin brother Acronix with one of the most dangerous and mysterious terrorists. of Ninjago, they know him as "Great Tyrant", but his real name is Tyrrant, son of the last king of Ninjago who managed to flee with several of his allies after the destruction of his father, but allowed himself to be possessed by the same entity that possessed to his father, the entity called itself "Omega".

· The entity "Omega" obtained his consciousness after the King of Ninjago created the "seed" thanks to it Omega was able to merge his energy with the consciousness of the king, from there Omega was born after pure magic destroyed the King. In addition, then hiding in the underground Tyrrant hired Clouse to be his personal scientist and doctor, when Omega is in control, he gives Clouse the necessary ingredients to create "Dark Matter", this substance makes every living being mutate and go out of control completely, turning it into a ruthless beast that even alters the physical state of beings, in addition Aspheera, Tyrrant's sorceress, uses matter to obtain dark powers and help her master.

· Tyrrant uses Krux to cover his crimes and prevent several of his allies from being captured or taken prisoner, they pay him too much for his silence, in addition, Krux and Acronix swore allegiance to Prince Tyrrant, since thanks to him Krux's life is ensures in Ninjago.

· The problems arose after Tyrrant's followers began to kidnap people from Ninjago for their experiments with dark matter or to use them as slaves in their mines, as well as people from the underground, these events greatly alarmed the council as well as the underground gangs. , including the people from the subway. The security increased, as well as the royal guard's unfair actions on the underground dwellers, even the people of Ninjago start blaming the underground dwellers.

· But then violent attacks on the city began, Tyrrant's men began to rob and attack workshops, mining and supply areas throughout Ninjago City, and not only in Ninjago City, but also in the leading underground areas and gangs also began to fight among themselves and to fight each other.

· Cole and Jay continued their research and projects on magic in the academy's private studies, but their mistakes caused several miscalculations that caused several explosions in the process. These accidents made them the losers of their class, even Dr. Saunders told them that maybe it would be better to leave the magic project. However Cole and Jay did not give up easily and continued their investigations.

· Cole and Jay's activities caught the attention of Zane, who upon entering his study helps them solve their poorly drawn calculations, Cole and Jay were surprised by Zane's intelligence and let him join their projects with magic, and thanks After Zane solved their mistakes, they managed to finish their inventions and achieve a new era of technology.

· During the first days of the disappearances Misako gave birth to Lloyd, Garmadon was able to arrive in time to be by Misako's side during the delivery and meet Lloyd for the first time, just like Kai and Nya, but Kai did not like it. much to go to the surface, but still did it to meet the son of Garmadon. Nya was excited to meet Garmadon's son, Kai not much but she did feel some affection for him baby.

· The problems came to Garmadon when even members of his resistance or acquaintances began to disappear and the members of his area demanded that he solve the problem soon. Garmadon asked Wu for help but the two could not catch the kidnappers as they were too smart and careful in their attacks and kidnappings, not even the little information they had served Wu in his case to solve the problems that happen in the city. .

· The problems increased when some of the missing persons appeared in the underground as sick in their entire physique or as acting like beasts without any control since they did not stop attacking anyone who crossed their path. Garmadon tried to catch them just like Wu, but the ones infected with the dark matter always ran away.

· Things in the underground increased after Krux forced several of his men to invade various areas to subdue people with the excuse of demanding answers for the disappeared, several of Garmadon's men tried to convince him to expel the guards from his zone, but Garmadon prevented them since he would not let the peace agreement of his zone with Ninjago fall apart and he would not let another civil war start, Wu managed to make an agreement with Krux to reduce his forces in the zone Garmadon, but he doesn't know how long Krux will break that agreement.

· On one occasion Nya found an old android in a junkyard, she repaired it herself, with a little help from Kai, and after repairing it she used her Arcadian magic to give limited life to its power source. Nya called him Echo and since then he has become very useful being in charge of various chores in his lair and helping Nya in various of her projects, even Kai asks Echo to take good care of NYa every time she goes out to one mission or work with Garmadon.

· Since Kai took care of Nya, he has taken it upon himself to make his sister strong so no one can mess with her when he's not around, she may not be good at fighting like him, but she's too good at shooting and shooting weapons at hand He doesn't always get mad at her, and they've always had typical sibling fights, but Kai still remained a good role model for Nya and a father and mother figure apart from Garmadon. Kai often teaches him how to fight and help him with various projects in machinery and engineering. Also thanks to Nya's plans, Kai managed to build his own hovercraft bike, which is capable of flying at certain heights and jumping long distances, the two sometimes use it to escape from royal guards or to commit robberies to other gangs. There are times when Kai tells Nya things about her parents so that she would at least know something about her real parents. Sometimes they go to the surface to see the stars and talk about what it would be like to talk about the different places outside of Ninjago City.

· Things got worse when Tyrrant's men made themselves known in the underground, beginning to subdue several gangs and some people to enforce their rules of little in the underground, apart from bit by bit eliminating various members of Garmadon's resistance already members of the royal guard and some policemen.

· Garmadon knew that things were already getting out of control and, under pressure from his men, he told Wu not to go back underground for his own safety, as it was decided to end Tyrrant's business once and for all. , so he went up to the city of Ninjago for the last time to be able to say goodbye to Misako and Lloyd in case he did not survive his encounter with Tyrrant, in addition, he asked Ronin to take charge of what was left of the resistance and Kai and Nya, and if it was possible to help his brother Wu in some cases.

· When Garmadon went to say goodbye to Kai and Nya the two brothers obviously wanted to accompany him, Garmadon refused and told them that it would be too dangerous for them, he also gave them the location of the new base where Ronin and the other resistance members would hide. As Garmadon left he didn't realize that Kai had followed him, but Kai told his sister to stay outside of Tyrrant's base, once he and Garmadon were out the three of them would go with Ronin and the others.

· Nya instructed Echo to go with Ronin so she could bring help once the three of them left the base. Nya sneaked into the base while Kai and Garmadon engaged Tyrrant's men. Garmadon feared that Kai would follow him. but still let him help him in the fight. What Garmadon did not expect was to meet his old rival Clouse, when they were companions Clouse tried to make life impossible for Garmadon and his brother, at the academy Clouse ended up losing to Garmadon and after that he left the academy and took refuge in the alleys underground where he continued his dark experiments. When Tyrran found Clouse the two began to cooperate with each other.

· Omega gives Clouse the ingredients so that he could produce a large amount of Dark Matter, plus power to control Arcadian stones and crystals that he manages to corrupt and use to his advantage. Omega and Tyrrant use their dark magic to be able to alter the dark matter in the systems that living beings possess in order to later control them, they are also capable of altering the physique of people who possess dark matter. Besides they use dark matter to also create weapons and mechs.

· The fight was difficult for Kai and Garmadon, as Kai faced Garmadon's henchmen he faced Tyrrant and Clouse at the same time. What they did not expect was that Nya managed to create a bomb that was capable of destroying the large deposit that kept the dark matter that they had created for the moment, that included the laboratory and several of her inventions, but the explosion was bigger than expected expected and ended up collapsing the entire building which caused several accidents in the closest buildings, but Garmadon took advantage of this to be able to escape with Kai.

· What they did not expect was that Omega would reveal himself coming out of Tyrrant's body and attack Garmadon, Kai and Nya, even Omega noticed that Kai and Nya were descendants of the First Ones, scared by this he did not hesitate to attack the brothers, but Garmadon was stood in his way, but could not avoid being stabbed by the evil entity.

· Seeing that, Kai became enraged and attacked Omega with his fire powers, this hurt Omega but he managed to escape and reach Tyrrant's body again. Tyrrant and Clouse managed to escape with several of their allies, but both were seriously injured. After the explosion Krux arrived with several of his men and sealed off the area in order to catch those responsible, Tyrrant and his men took refuge in Pythor's bar where he let them stay as long as they paid him.

· Before the building collapses, Kai manages to push Nya out of the building so that she falls to a safe place, even though she begs him not to leave her, Garmadon with his little remaining strength manages to free Kai from some rubble and throws him out of the building where Kai falls safely into the river in the area before the entire building explodes and collapses into the river Kai fell into, despite not dying in the explosion like Garmadon, Kai manages to be caught by the bursts of fire and almost half of his body was burned and injured, when he fell into the river the current dragged him to the nearest shores of a port.

· When Krux surrounded the area he let some firefighters and police take care of putting out the numerous fires and to help those who were trapped in the rubble and when he reached the bank of the river Krux found Kai badly injured, he had his men help him take him to the hospital and then send him to the Krypatarium prison to later hold him responsible for the explosion in Tyrrant's building. Kai was in critical condition, and due to his burns on his left side his arm had to be butchered, his face was left with severe burns and scars that were difficult to heal. After closing the case, Kai was put in the Kryptarium prison where he fell silent after they told what happened.

· Even Krux made sure that Wu did not get involved in the case anymore since he had stated that the cause of the accident was already locked up in prison, but if he confirmed that Garmadon had died, the news left him completely devastated and Wu even told him. He said to Misako who deeply cried the death of her husband, not even Wu or Misako knew if Kai and Nya were okay, they just hoped that maybe Ronin was taking good care of them.

· Nya cried the death of Garmadon deeply, she tried to find Kai but she never found him and thought that maybe he had also died during the explosion, she also thought that all this was her fault for letting herself be carried away by her emotions and not finding another solution. . She fled the place so as not to be caught by the guards and manages to meet Ronin and other rebels who accompanied him along with Echo, telling him everything that happened Ronin promised to take care of Nya in honor of Kai and Garmadon, but to ensure that they would find Tyrrant and they would make him pay for all this.

· Ten years pass and Tyrrant and Clouse started all over again from scratch, but they managed to get a huge following, but they still remain hidden. Kai hasn't said anything to the guards during his ten years in prison, but he managed to become even stronger, even with only one arm, improved his fighting tactics and other abilities, even making sure that no inmate was issued with him. Ronin and Nya managed to establish a base and create a new resistance, this time against the forces of Tyrrant and the corrupt in Ninjago, their forces and resources grew quite a lot and their base is almost at the limits of the underground and Ninjago, in addition to the Men have managed to steal numerous resources that were going straight to Tyrrant with the intention of ruining his plans, plus ruining transports of dark matter throughout the underground.

· Zane, Cole and Jay become famous inventors after they use magic in various technologies for the city thanks to the discovery of the Arcadian crystals that Cole longs to discover in his family mine. This discovery made Ninjago evolve more than ever and they manage to make more commercial ties with other kingdoms. Skylor and Morro managed to graduate with honors and become police officers before being able to enter the Ninjago Royal Guards Military Training Academy, although the dark matter cases make Skylor very curious, even secretly doing her own research while helping Wu with some related cases, but Morro is not very interested in the cases as he is more focused on graduating now from the military academy.

· Wu and Misako are still mourning Garmadon's death and Wu tries to contact Ronin but is unsuccessful as he just wants to make sure Kai and Nya are okay. Wu suspects that the fights that have broken out at the ports may be some rebels and followers of Tyrrant, but he can't confirm anything as he has no proof. Now Lloyd is 10 years old and grew up hearing stories about his father and about Kai and Nya, the two brothers who were adopted by their father, since then he tries to find out who the real killer of his father was and steals some evidence from his father's office uncle in order to find out who was responsible. His dream is to be a great champion like his father, as he wants to protect his family and if it is possible to find Kai and Nya, he is not good at fighting, but he gives his best in school, but he became an excellent shooter in the target practice thanks to Skylor and Morro. In addition, Lloyd managed to make good friends with Zane, Cole, and Jay as each of them became his tutor at school, and thanks to them he managed to get good grades on handling magic making him almost a prodigy at a time young age, thanks to this ability in Lloyd Zane, Cole and Jay take him to his workshop and help them with new inventions about magic.

· But one of Lloyd's flaws is that he gets into trouble a lot, either at his school or with some police officers or royal guards along with his best friend named Harumi, who he spends most of his time with.

· Ronin and Nya managed to form a good army of rebels for their resistance after the events in Tyrrant's tower, their base became a good compound where even other people from the underground joined them and managed to form their own families and in honor of Garmadon built a statue in his image and on a large wall each rebel can paint or put the name of any fallen friend or family member. Nya wrote Kai and Garmadon's names and painted their portraits.

· Although Ronin and Nya's cause appears to be good, Krux still forces his men to capture every rebel they find. Its base is located on the border of the underground and Ninjago, it can only be reached faster through the tunnels and sewers. In addition, its base is replenished with numerous vegetation and a great river that is clean and pure.

· Kai went through many difficulties in the Kryptarium prison, since he entered his wounds had not yet fully healed, which made him an easy target to annoy and intimidate, but he managed to gain respect from the other prisoners despite his injuries. and having only one arm, the Kryptarium prison is recognized for being one of the most dangerous and harsh prisons in the city, the most dangerous criminals in all of Ninjago are kept there, but it is considered the most reinforced, armored and armed in all Ninjago city. Kai only survived with the idea that one day he would get out of prison to find Nya and take revenge on Tyrrant once and for all, but Kai still doesn't know if Nya managed to survive or if Ronin found her and took her to a safe place in the underground.

· After learning of Zane, Cole and Jay's success, Tyrrant and Clouse began plotting to steal several of their technologies related to Arcadian crystals and stones, which are the keys to creating a new "Seed". Zane, Cole and Jay try to discover how the stones and crystals manage to adapt to magic and other technologies, they even made several prototypes to be sure and be able to better handle the stones and crystals.

· Initially Tyrrant's men stole an entire shipment of Arcadian stones and crystals that were to be directed to the workshops where Zane, Cole and Jay work, but the robbery was interrupted by some rebels, at the end of the fight each side stole a part of the shipment plus prevent a shipment of dark matter from being sent underground. This began to worry the council and knowing that Krux was not letting Wu do his job well they began to put a lot of pressure on him that if he does not solve the case soon he will be removed from his position as commander and he will be discharged.

· On the day of Ninjago's anniversary, Zane, Cole and Jay announced their progress in research on Arcadian crystals and stones and the wonders and advances they can do, this announcement reached Tyrrant's ears as soon as the news spread through all Ninjago as well as in Ninjago, knowing this, Tyrrant plans to carry out an attack on Zane, Cole and Jay's laboratory, since most of the Arcadian crystals and stones were there. Tyrrant's men blew up a large part of the laboratory as well as some warehouses, thus several Arcadian stones and crystals were stolen, apart from that the thieves blew up one of the underground bridges to prevent the police and the royal guard from chasing them. . Now that Clouse received the Arcadian stones and crystals, he almost had the resources he needed to further increase his dark matter production so he could get a new army for Tyrrant, and also to create a new Arcadian seed.

· After the attack Wu and his men manage to capture several of Tyrrant's men who couldn't flee because of the explosion, they were sent to the Kryptarium and Krux couldn't do anything to deal with them. Skylor was very curious to solve the case, more to be able to help her friends Zane, Cole and Jay, she has already been investigating this type of attack for a long time but Krux and the royal guard considered her insufficiently capable to be involved in this type of attack. cases, Wu couldn't do much to help her but after Wu was finally able to get the case without Krux's authorization, Wu was finally able to include her in the case, but Chen tried to convince her to drop the case as it might be dangerous for her since she wanted her daughter to leave the case to the high command officers while she concentrated on graduating from the police and being able to enter the ranks of the royal guard as she wanted.

· Skylor is glad that she can finally be involved in the case, even Wu gave her the authorization to enter any area of the city. At the moment Skylor knows that the first clue will be about interrogating those involved in the explosion, and she thought that if she solved the case before the high-ranking officials, everyone in Ninjago would recognize her for her courage as a police officer and a warrior. This was discovered by Lloyd very quickly after eavesdropping on her while he was hiding in his uncle's office, Lloyd tried to convince her to let him help on the case, but Skylor obviously told her no since she said he was just a kid boy, but still Lloyd followed her secretly without saying anything to his mother or uncles.

· Before leaving, Skylor told her friends that she would do everything possible to solve the case and prevent further attacks from happening against her. Zane, Cole and Jay obviously wouldn't leave her alone so they accompanied her and if they accompany her it would be easier for her to access highly restricted areas, plus Wu gave Skylor special permission so she could enter the Kryptarium and interrogate any inmate she found wish. Dr. Saunders promised his students that he would stay in Ninjago so he could take care of his work with magic and not let anyone near his inventions until they got back, other than telling them to be very careful.

· Arriving at the prison Skylor and the others were surprised that the suspected prisoners were seriously injured, Director Warden Noble is in charge of the prison and informed them that a single prisoner was the one who left them in a critical condition, the The prisoner turned out to be Kai, who apparently realized that the new prisoners were Tyrrant's men and without thinking twice he attacked them all in the cafeteria where he left them all injured in a single instant. Kai was known as prisoner K-70600, or Red Shogun as the prisoners called him, seeing him as a fierce warrior who delights in finishing off his opponents, and the prisoners feared Kai in extreme fear because of how strong he was, not even the guards dared to mess with him during the ten years they kept him prisoner. Despite having only one arm and having half his body injured, Kai was known to be one of the strongest inmates in the prison.

· Kai's physical condition obviously changed over the years in prison, he got more scars, his face on the left side was scarred with severe burns, plus his eye was left somewhat blind, his entire arm was amputated, but even so he remained physically and physically healthy. Mentally, he also didn't get any difficulties during his healing process. Kai also inked several tattoos on his body, such as Garmadon's resistance symbol on his back, his handwriting and identification numbers on his necks, his medallion symbol on his right arm as well as the fire symbol and figure of a dragon and on his right bicep the shield of the underground was tattooed.

· Skylor questioned Kai and discovered that he was related to the subway accident ten years ago, this was the case that Krux quickly closed and prevented Wu from getting involved, also Skylor discovered that Krux framed Kai in order to close the case more quickly, but was very surprised when Kai told her about Tyrrant and Clouse who were involved in creating dark matter, things that made more sense to Skylor. Knowing about this, Skylor informed the others that the first step would be to go underground to try to investigate Tyrrant's whereabouts and about the clandestine network of dark matter, but Kai proposed that if they freed him, he could guide them around the world underground and get them more information about Tyrrant faster. Skylor didn't trust Kai very much, but needed someone who could guide them safely underground, so with no other choice, Skylor asked the prison warden to release Kai, but he would be under his supervision.

· Being free Kai took them to the underground through the river where it would be easier to enter without having to stop to ask the guards for permission. But while they were on the ship they discovered that Lloyd entered the ship secretly, they only discovered it when Kai noticed the lack of several sweet fruits on the ship, plus seeing how something small was moving under some cargo boxes. Skylor and the others were obviously furious at Lloyd for following them, but Kai was shocked to hear that the boy was Garmadon's son, and more shocked to hear from Lloyd that he wanted revenge against the people who murdered his parents. When Kai approached Lloyd, he confirmed that he was Kai, which confused the others when they saw how Lloyd demanded many questions and answers from Kai.

· Whilst in the rebellion, Nya learns more dangerous things about Tyrrant's future plans after they manage to get several of Tyrrant's allies to talk, so it is decided that the new plan is to stop pursuing Tyrrant for the time being and destroy the dark matter factories that Tyrrant possessed. But Ronin doubts it since the places where the factories are located are dangerous and could put several members of the rebellion at risk.

· Nya considers the resistance as a second family, and since she lost Kai Nya has changed a lot, from being a defenseless girl she became a strong and independent woman. He still has Echo, who improved his mechanisms and turned him into an expert combat android, plus Nya adopted a little Merlopian boy named Benthomaar after rescuing him from a black market underground, since then Nya treats him like her younger brother and someone precious to her.

· Benthomaar is one of the few children who help the resistance in some missions, he was only three years old when the slavers tied up his family in Merlopia and captured him to sell him as a slave, a short time later he was rescued by Nya and several members of the resistance resistance after the rebels attacked the black market in search of dark matter. He has the appearance of some kind of shark, and is one of the best swimmers in the resistance.

· Benthomaar grew up with Nya's stories, he knows who Kai and Garmadon are, as well as who was responsible for their deaths, sometimes he sees Nya sad every time he talks about his brother, as if he longs for the good days he spent with his brother higher. Echo became his second personal babysitter apart from Nya, he enjoys spending time with him but when Echo spends her time doing chores Bentho gets pretty bored. He is not good at fighting but he is good with his trident and he is good at swimming in different currents of water, he even enjoys talking to some sea creatures he comes across. She learned how to defend herself thanks to Nya, but they also do fun things together like ride the hovercrafts, swim in the river and walk in the forest, which is near her base, plus I learn how to use the slingshot quite well. But sometimes it bothers him that Nya is so overprotective of him, but Bentho just wants to help Nya.

· Kai and Nya meet again later during an ambush in one of the subway towers.