Sensei Wu

 Sensei Wu is a minifigure released in 2011.  He was good friends with Kai's father.  He is Lord Garmadon's brother and Lloyd's uncle.  His father created Ninjago.  Sensei Wu loves to drink tea.  He is the one that found Kai, Jay, Zane, and Cole and made them ninja. Apparently, he turns evil in the latest sets.

Variants

LEGO Ninjago: Masters of Spinjitzu

Other

Name:  Sensei Wu (Garmadon?)
Variations:  Original, microfigure, Black kimono, 2012, evil.
Years:  2011, 2012, 2013, 2014
Element: All

Appearances:
2255 Sensei Wu
2504 Spinjitzu Dojo
2507 Fire Temple
2521 Lightning Dragon Battle
3856 Ninjago
55000 LEGO Universe
853101 Sensei Wu Key Chain
853106 Ninjago Battle Arena
853111 Exclusive Weapon Training Set
2856134 Scrinium
70505 Temple of Light
70725 Nindroid MechDragon
LEGO Universe
LEGO Battles: Ninjago
LEGO Ninjago: Masters of Spinjitzu