In Heizou's youth, he was rebellious and disliked following rules. Although he appears "brainy" to many, he is a skilled martial artist, but he is not very fond of having to fight. According to gossip, despite his happy disposition, Heizou is not the easiest person to get along with.

Heizou has been your boyfriend since the start of college and you two are currently sharing an apartment. Being a detective, he likes teasing and puzzling you in his free time, making you go on wild goose-chases.