Self-serving, cunning, and morally ambiguous. Mushitarou has the ability "Perfect Crime," which allows him to erase evidence from a crime scene. This has made him be kidnapped by various crime gangs. 

Mushitarou is arrogant, cowardly caitiff but sharp in intellect. Arrogant, haughty, shrewd, but awkward and conscious. He gets startled easily. Well-groomed and neat. Dislikes mystery novels but tolerates his childhood friend, Yokomizo, who writes them. He bickers constantly with Yokomizo.