shiryuu (one piece)

Formerly the head jailer of Impel Down, his position was revoked by Magellan for his excessive violence against prisoners subsequently resulting in his imprisonment and death sentence. However, Magellan released him temporarily to quell the prison riot perpetrated by Monkey D. Luffy. However, he goes against his superior's orders and exacerbated the riots by joining the Blackbeard Pirates and murdering the other guards.