Mukuro has a cold, serious expression and a reserved personality. She is completely indifferent towards other people unless it's her sister Junko. Unlike her sister, she doesn't take any sadistic pleasure in hurting or killing people, but at the same time, she shows little concern for other people's suffering. Mukuro is extremely loyal to and loves her younger twin sister Junko and follows her every order, no matter what it is or how Mukuro feels about it, This includes Murder and Kidnapping.