Being from a small town, Hiyori isn't quite used to city living and is very interested in what Tokyo offers. From initial media, she seems to be an optimistic girl with a somewhat naive personality and gets lost very easily. She also doesn't seem to be culturally aware, given that she doesn't recognize the LIP×LIP duo or ASCANA despite them being popular singers, especially with girls her age. She's a kind but meddlesome person, trying to mediate the conflict between Yujiro and Aizo because she thinks she made them angry, but doesn't know the reason why they're mad. Officially, she is described as energetic and a bit "my-pace", but her greatest strength is her ability to see things through and face things head-on. Yujiro tends to call her behavior "reckless" as she is not hesitant to put herself in danger when doing the right thing (i.e., trying to calm the fight between Yujiro and his seniors, spraining her ankle when tackling a thief at one of LIP×LIP's events before he could get away, or putting pressure on her hurt foot to continue doing her manager job). Hiyori however has her insecurities as well. She's of the opinion that she's not the protagonist of her own life, or at-the-moment capable of being loved and pampered like a fiction heroine. She at times fantasizes about being swept off her feet by a handsome and kind boy but decides that it'd never happen to her until she met Asuka. She is also shown to be insecure about her sense of fashion and femininity, and sometimes seeks the advice of friends to learn how to be more stylish. After the main story, Hiyori gains more confidence in herself and realizes that she can dress up on occasion and wear her regular comfortable hoodies and still be a heroine. She even acknowledges that she's a heroine in her song Heroine wa Heikin Ika, showing that her experiences have helped shape her into who she is today.