She joined student council and was elected secretary with Bunta Kouno. She became Midori's best friend. She longs to be Shuuichi's girlfriend ever since they went to junior high together. At first glance she looks like a stuck up or cold person because of her attitude. But she really is nice. Midori likes to call her "Mamirin". The nickname sounds like "Marilyn" because Mamiya has mole that looks like Marilyn Monroe's. (Source: Wikipedia)