• Days after it was believed that Kai had died in combat, Morro, Master of the Wind and Wu's apprentice, formed his new group of rebels called "The Ghosts", his group was made up of extremists and Wu soldiers who violently attacked bases and Emperor Garmadon's labor camps to steal weapons and other resources for his cause. This new rebel group caused several problems for the rulers of other kingdoms, civilians, and other rebels of the Wu Resistance, as their attacks made it difficult to rescue prisoners and properly weaken Garmadon's forces.

• As Wu did not want to start new disputes with his former apprentice's group, he let Morro and his followers do what they wanted and ordered his soldiers and the Ninjas not to interfere in Morro's work, but to rescue the people innocent in danger. Even though both sides supported each other, there are several moments where everyone disagrees due to their ideas and actions.

• After a year of living in the palace Kai became Lloyd's only servant and guardian, but so that the Overlord would not suspect Kai, Garmadon ordered Kai to join the training of the palace soldiers, but he would have special training, generals Kozu and Samukai would personally take care of his training, although Kai's training would be difficult, Garmadon knew it would be the only way to make Kai become stronger so he could better protect Lloyd from any danger in the future.

• Kai's training was too violent and rigorous, it was fortunate that Kai was already in good shape to be able to withstand the training of the two generals, but Kai knew that this type of training would be too different from the one he received from Wu, Kai had he had to hide many of his Ninja skills so that no one would suspect that he was the Red Ninja, which is why he sometimes allowed himself to be beaten in training and had to always keep up with the other recruits.

• Kai's training was not every day, since Kai had to be by Lloyd's side and fulfill his role as guardian, but every time Kai finished his training he at least received medical attention from the palace doctors and was allowed them to return to their cell to rest. . But Garmadon had ordered that Kai finally have his own room, which was close to Lloyd's room, it was not that big but at least it was comfortable for Kai, so it would be better to hide the notes and maps of the palace from the guards.

• Despite the painful training, Kai was still able to continue his duties by accompanying Lloyd in his activities, and in addition, Garmadon was able to discreetly provide Kai with more information about places he could investigate within the palace, Garmadon even gave him the key where Garmadon had hidden the Overlord's research and the Green Ninja prophecy. But the part of the palace where the hidden room was located was sometimes heavily guarded by guards, so he could not stay in the room for long and could only carry very few books and scrolls.

• Kai also discovered that the room contained many images of Empress Misako and Emperor Garmadon when he was still a normal human, as well as other family portraits and images of the First Spinjitzu Master. Kai must have assumed that Garmadon hid them when he was free from the Overlord and the poison of the Great Devourer.

• There are times when Lloyd always asked Kai various things about what Ninjago was like before, Lloyd knew from the stories he heard in his classes that apparently Ninjago was governed differently before his father became emperor. Kai told him that Ninjago had not previously been enslaved by his father and that it was a peaceful and prosperous kingdom without the need for numerous wars. These stories always surprised Lloyd and he always asked Kai to tell him more about Ninjago's past.

• But Kai always asked Lloyd not to tell anyone about his stories since it could be dangerous, Lloyd promised not to tell anyone since he didn't want to get Kai in trouble, whom he already saw as his older brother.

• On Lloyd's seventh birthday, Harumi, daughter of the leaders of the Jamanakai people and members of Garmadon's council, appeared before the prince and, being the same age, the two immediately became close friends. Upon learning this, Garmadon let Harumi and her family be able to visit the palace whenever they wanted, Kai did not trust Harumi's parents as they were very loyal to Garmadon and his cause, but if he trusted little Harumi, Kai could see that Lloyd and Harumi were very similar, and he always accompanied them in their games in the palace courtyard or in Lloyd's game room.

• Kai told Lloyd and Harumi other stories about Ninjago, both children were fascinated by Kai's stories and always imagined that one day they would see all the things Kai always told them. Kai even helped the children create toys so they could play together, since then the two children became great friends and Kai really liked being around both children.

• As time went by Kai became more and more tolerant of the generals' training, sometimes Garmadon even confronted Kai just to show everyone that Kai was worthy of their trust, at least that lessened the guards' suspicions. Lloyd didn't like seeing Kai hurt after every training, only Kai calmed him down by telling him more stories about Ninjago, Kai even told him about his grandfather, the First Master, his father Garmadon's previous life, when he was still a good emperor, and about his mother Misako.

• Lloyd never heard much about her mother, the Empress, even her guardians avoided talking about her, Kai was the first person to talk about her openly, he didn't think that Kai was previously part of the royal guard that protected his parents, but Lloyd was at least happy to know that his parents were kind people in the past. Lloyd even wondered if his father would one day be free of the Overlord's control and the Great Devourer's poison.

• On Lloyd's eighth birthday, Kai met Skylor, daughter of Lord Chen, who built a fortress to train other soldiers who would participate in battles against the rebels, but what no one knew was that Skylor was a spy for the Resistance of Wu, she joined Wu after freeing numerous rebels who were found in Chen's work camp, the rebels confirmed this to Wu and one day they both met secretly, Skylor gave information to Wu and since then she He became a valuable source of information for the rebellion.

• When Skylor met Kai she knew immediately that he was the late Red Ninja since she previously met Nya, who became close and Nya showed Skylor a photo of Kai, obviously Kai asked her to keep the secret and Skylor promised her that his secret was safe with her, but that was how the two formed an alliance to help the rebellion, Kai gave his notes to Skylor and she made sure to give them to the rebels who escaped and returned to the Resistance.

• Skylor even became a good friend to Lloyd, the two got along well and that made Kai feel better, even Skylor fought Kai just to pretend that they were both still trustworthy to Garmadon and Chen. There were times when Kai had to accompany Garmadon to make some conquests and he could not avoid fighting against some rebels and soldiers who sought to protect the towns and kingdoms from him. And in order not to be discovered, Kai never took off his mask so that no rebel would recognize him. He also invented a false name, Kai called himself the "Red Shogun," and he only used it when he entered the battlefield.

• Also, there was an occasion in which the Ghosts impudently attacked the palace at night, and it was when Garmadon was not in the palace since he was on another conquest, Kai luckily was there and was able to protect Lloyd from the attack, The Ghosts, seeing that their attack was unsuccessful, fled, but Kai knew that it was time to teach Lloyd to defend himself.

• Lloyd was forbidden to fight by orders of Garmadon and the Overlord, the Overlord thought that perhaps Lloyd would be a threat if he learned to fight and Garmadon had no choice but to prevent his soldiers from training Lloyd. Kai secretly taught Lloyd, as long as no one saw, he taught him inside his room, in some blind spots in the yard and in the forest. In order not to attract too much attention Lloyd and Kai pretended that their outdoor training was games, Lloyd was the one who said that he himself invented the games, only then would the guards stop interrogating Kai.

• Kai began by teaching Lloyd basic self-defense techniques and ways to be in good physical condition, and it was fortunate that Lloyd was an agile child and attentive to everything that was happening in his environment. It was then that Kai began to talk about the Green Ninja prophecy to Lloyd, Lloyd thought it was an interesting story, since then he always asked Kai to tell it to him every night before going to sleep.