Makoto and Komaru Naegi's mother.
She is briefly shown in the DVD given to Makoto by Monokuma as the first motive. In the video, she is sitting on a couch with her daughter, Komaru Naegi, and her husband, Makoto and Komaru's father. The three of them congratulate Makoto on his acceptance to Hope's Peak Academy, but after a brief time, they disappear and the room is shown empty and disheveled in their place.
(Source: Danganronpa Wiki)