Sensei Wu is the teacher of the ninjas. he can do all the elements like fire,ice,lightning,and earth. His brother is Lord Garmadon. He fell into the underworld. Their father is named Master Wu. Sensei Wu chose Kai,Zane,Jay,and Cole because he knew that Lord Garmadon was going to come back and fight for the Golden Weapons of Ninjago Master of Spinjitzu
Zane was the third ninja to be chosen to be a Ninjago Master of Spinjitzu. Sensei Wu found him under a frozen lake. Zane was trying to stay in the frozen water for as long as possible until he saw Sensei Wu. Wu told him if he wanted to be one of Ninjago Master of Spinjitzu. His power is ice. He is a Nindroid.