Kai(Fire Ninja)

Kai is an Arrogant ninja, who used to work in his Blacksmith Shop with his sister Nya. His Shop was attacked by Lord Garmadon's skeleton army and Kai was losing. Sensei Wu came in and saved Kai. Wu saw Great fortune in Kai and brought him to the dojo. There, Kai met Jay, Zane, and Cole. Kai always said he was the Green Ninja, but it never came to be. Kai also Has the high score in his favorite video game.