Dr. Julien

 Dr. Julien was a main character in the LEGO Ninjago: Masters of Spinjitzu TV series.  He was an inventor and the the one who built Zane.  He passed away after turning off Zane's memory switch, but was revived by Samukai to build their vehichles.  He now helps out the ninja.  He has never appeared as a physical minifigure.

LEGO Ninjago: Masters of Spinjitzu

Name:  Dr. Julien
Years:  2012

Appearances:
LEGO Ninjago: Masters of Spinjitzu
  Season 1:
    •"Tick Tock"
  Season 2:
    •"The Last Voyage"
    •"Island of Darkness"
    •"The Last Hope"
    •"Return of the Overlord"
    •"The Ultimate Spinjitzu Master"