|Ooishi Osamu大石 理|
|Clothes||, Dress, Fur Coat, High Heels|
|Visual novels||Side character - AI: The Somnium Files|
|Voiced by||Miyake Kenta (Japanese)|
Mama is the owner of the bar "Marble" in Golden Yokocho in Shinjuku. Date and Renju are regulars there and she knows them well. She is also an information broker in the criminal underworld.