In Heizou's youth, he was rebellious and disliked following rules. Despite being an officer, his investigations and work revolve around his personal principles. Although he appears "brainy", Heizou is a very skilled martial artist, but he is not very fond of having to fight, as he considers apprehending criminals in that manner blunt.

Nonetheless, he always brings back results. According to gossip, despite his happy and flirty disposition, Heizou is not the easiest person to get along with.