 This nature came about when Byoudouin first lost to Oni in a match, but then amplified when Byoudouin protected Duke's younger sister from a collapsing roof.The injuries sustained from the accident made Byoudouin lose the subsequent match in a group league, forcing his team to drop out.The team blamed Byoudouin for the team's loss, and Byoudouin has since become bitter about any notion of self-sacrifice.