Momoka is Yuma's younger sister who is popular with the boy's; but, is hated by the other girls at her school. She can be vindictive, such as the time she tried to get the Eriko friend group to turn on Yuma by trying to frame her for the attempted sabotage of the Ayano and Takanori relationship. She will also go after the other girls in her schools boyfriends. She has problem with her Yuma because she kept protecting her.
