Doctor Butterfly is the leader of LXE. His original name was Bakushaku Chouno and he is the still-living great-great grandfather of Koshaku Chouno (Papillon). Dr. Butterfly has a moth-shaped mustache, and his battle outfit resembles a white version of Papillon's, with an attached a cape. He considers Papillon weak, saying he cannot go very far on his own, which leads Papillon to challenge him to a fight with their Buso Renkin.
