Brad Joker is a man who looks to be in his mid-to-late-twenties. He, despite being young, has white hair and sharp eyes. Working as a doctor, he normally wears a white coat. Brad has a generally relaxed attitude, but becomes quite stubborn when arguing, which he often does with Hilde. He does not have an implicit trust in organizations, preferring instead to go his own way when making decisions. This causes him to push work he deems unnecessary onto others, the most common example being medical lectures onto Hilde.

(Source: Wiki)