Deceased former fiance to Haruna Kurahashi. Marriage arrangement occurred between the two when Haruna was at the age of 10. (Haruna is currently 18+) Premises of this character are in selflessness, compassionate, sensitive, caring, nurturing and peaceful.
He died when Haruna was about 17, of Leukemia, six months before their marriage. It is worth mentioning that Mamoru and the player have resemblance to each other both in character traits and appearence. (by panzerfan)