Jay is the ninja of Lightning, a talented inventor with a crazy sense of humor and a huge crush on Nya. He loves all the new technology around today, although his efforts to take it apart and figure it out have led to more than a few explosions.
Nya is Kai’s sister and has proven herself to be a hero many times. When the ninja team first formed, she had a hard time getting into the action. She was never trained in Spinjitzu, but still wanted to be part of the adventure.
Sensei Wu was a hero for many, many years on Ninjago. One day, he realized that the threats he was facing were too much for one champion.
Kai is the ninja of Fire, and though he is a hero now, he came from humble beginnings.His father was a trusted ally of Sensei Wu and the two adventured together for many years.
Zane is the ninja of Ice. He was known in his village for being able to sit at the bottom of a freezing lake for an incredibly long time (something it turns out he was able to do because he is a robot).