Motegi is one of Fumi's friends at Matsuoka Girls' High School. She, Yōko and Misako appear to be long-time friends giving one another the nicknames Mogi, Pon-chan and Yassan respectively. She belongs to the very tiny Drama Club and seems to enjoy theatrics.

Spoiler

Mogi begins dating Akira's older brother Shinobu later on in the series after meeting him and spending time with him during a trip to Kyouko's villa during the summer.