• After Kai lost his arm, the others would not hesitate to seek revenge for their friend. And poor Serpentine if they cross their paths again.

• The boys would feel sad for not receiving hugs from Kai, since their hugs make everything right between them. They always thought that Kai's two arms would always protect them from everything. But now they didn't know what to think when they saw their ardent friend with only one arm now.

• Kai was always there to cheer them up and reassure them with a hug always. Now it was their turn to give him a hug, to reassure him during his healing process.

• Still having one arm, Kai would still make sure to cheer them up and reassure them with one arm, and that would ease everyone's worries by knowing that he will be fine and that he will soon feel those hugs from him again.

• Zane being an android robot, would make a robotic prosthesis to Kai to replace his lost arm. But in that Kai would get excited and ask if he could put missiles in his elbow and guns in his whole hand. And that's where Zane would tell him it would be impossible for him.

• Cole would be there with him to help him in everything and in his rehabilitation, he would be like Kai's personal crutch, since apart from losing his arm, he also caused other severe injuries to his body that almost prevented him from walking.

• Nya and Lloyd, being his younger brothers, would be with him all the time during his recovery. They did not want to leave him alone again, since that was what caused him to be seriously injured and to lose his arm. Lloyd would be apologizing all the time, since he felt it was his fault, however Kai would say little blows to his head and scold him that nothing that happened to him was his fault, and he would say that he would even be able to give his other arm if that meant saving his younger brother, despite not being of blood.

• Jay would be the one who would make him not get bored so much in the hospital, he would bring him games, food and if any anxiety arises in Kai he would be there for him and calm him down, just as Kai did with him. Even he would propose to make a competition of which would be the best prosthesis for Kai.

• His family and that of the other ninjas, including Garmadon and Morro, would be there to help him as well as the others. Koko and Maya would be glad at first and then scold him for not doing that again because they were afraid of losing him.

• With Morro, Kai would take care of him watching Lloyd and his sister while he is being held in the hospital. Without complaining he would accept with pleasure and normality.

• Garmadon on the other hand would proclaim him as a great warrior who survived the battle and join with others to participate in the game of inventing the best prosthesis for Kai. Where he would put a sword hand, shark, claw, spear, throw flames among other deadly weapons that Koko strictly told him not to bring.