Mikako is a quiet person and doesn't talk very much, and when she does, she sticks to short replies after long periods of silence, often causing people to forget she's around or become surprised when she eventually speaks up. She is unresponsive in a conversation, and avoids making eye contact with anyone she talks to, giving her an impression of an unfriendly student to most of her classmates. Despite this, her expertise on the paranormal allows her to sense danger and promptly prevent it from happening, or at least remedy the situation. She can also see through one's "inner demons", which is very evident for her talent. Her silent personality fails to falter in most situations, even when the Killing Game is first announced or when the first motive is given to the students. This, however, helps her in certain cases, as she remains composed in mostly every type of situation. She also appears to be somewhat analytical, being the first student to notice how it'd be impossible for the rope that's hanging Kiyoka to be wrapped around the pole in the manner it was done in.