He defected the black market arms dealer organization RaD with the Overed Rail Cannon he have stolen. In-game, player will be tasked by "Cinder" Carla to eliminate him and take back the rail cannon.
As a Doser, or someone who uses Coral as a recreational drug, his attitude can be described as eccentric: he considers Carla as a "friend" even after his betrayal, he talks to his AC and the rail cannon, and thinks AC fight as a ballroom dance. As such, him and his quotes have become a meme among Japanese fans.
