Toko is intellectually gifted, but she has problems in social behavior. It's been stated that she either never learned or never bothered to learn social skills. She even considers herself a gloomy outcast, often deciding to distance from others.

Due to the constant bullying she faced as a child, Toko is highly suspicious of other people, frequently accusing them of thinking bad things about her. She expresses her opinions freely and extremely bluntly, which can come across mean and more than often rubbing people the wrong way, though she claims she is just being honest. She has unusually quick tendencies to self-victimize and she refuses to believe compliments from other people. She also is very self-conscious about her body and tends to think that other people consider her very ugly. At times, in Another Episode, she tries to appear as young as possible and she is paranoid that others might consider her "an old hag" However, she is also offended if her body is not considered attractive and adult-like.