Shizuo Heiwajima

Shizuo Heiwajima (平和島 静雄, Heiwajima Shizuo)

A guy who wears a bartender's suit who has an incredibly short fuse and insane strength. He injured his muscles trying to pick up something heavy when little, which broke down the mental limits that people usually impose to their muscle & uses them in full potential. He hates Izaya for framing him for a crime in the past.

Ironically, his name means "quiet man, peaceful island."