Mahoro is a high school student who Arajin is deeply in love with. She is the sister of Marito Jin, and is completely obsessed with him, wanting him all for herself. She doesn't care for Arajin and his advances, and frequently sees him as weird or gross, only keeping him around so she can manipulate him into doing what she wants from him. While she tends to keep a cutesy, sweet look on the exterior, especially around her brother, she isn't afraid to get serious and show her more manipulative, intimidating side around people she dislikes.