Peko has a serious demeanor, expressing very little emotion. Due to this aura, she often comes off as intimidating. She is neither impolite nor an antisocial person though she dislikes being in a crowd. She comes off as cold but this isn't because she means to. she believed that she didn't need to smile and therefore eventually forgot how to, Peko has a kind heart, and cares deeply about Fuyuhiko but also cares about her fellow classmates. She wishes nothing but good towards them.