大沢 マリア

Hitomi's twin sister and Kenji Osawa's daughter.

She was kidnapped the night before, but mysteriously found herself free in the city with amnesia. She takes the part-time job for Yanagishita and dons the Tama costume, but removes it once the "Burning Hammer" sales demo is over. She wanders around Shibuya in search for a clue to her identity.

After her middle-eastern friend, Canaan, warned her about Alphard's plot to have Hitomi kidnapped, Maria planned out a twin swap in order to have the kidnapper, Daisuke, take her by mistake. Maria is allegedly infected with the Ua virus (proven incorrect in Bad Endings), which is used to spur the main cast into trying to save her.