Dr. Julien

Dr. Julien is a old minor hero and ally of the Ninja in LEGO Ninjago: Masters of Spinjitzu. He is an inventor who created several impressive robots, including, Zane & his Falcon. When Dr. Julien was dying of old age, Samukai revived him the elixir and held him prisoner in lighthouse island forcing him to build ferocious war machines his army. If he would agree to build war machines he would be released, and to ensure that he does not flee from Samukai left there the Leviathan called sea monster to guard. Ninjas released him, and he helped them to defeat Overlord. And then before season three's events he died a second time.