Shizuo seems as a violent, no-nonsense tough guy. However, it is implied that most of the time, he is quiet and nondescript, simply following Tom around as his bodyguard. He does not really like violence and has misgivings about his own strength; unfortunately, he has a very short temper and when angered, his body "acts on its own“. Despite his violent temper, he is shown to be kindhearted. He hurls a variety of heavy objects, including trash cans, vending machines and even cars when angry. 