Mukuro has a cold, serious expression and a reserved personality. She is completely indifferent towards other people unless it's her sister Junko. She enjoys any and all kinds of food noting she's not picky when it comes to it, and mentions playing first-person shooter video games. 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. She turns ecstatic and feverish when thinking about Junko.