A woman employed at a hospital owned by the Tsukiyama Group.
On the surface, she seems to be a typically kind and caring woman. However, this is merely a mask used when others are watching. During the late hours, she sneaks into the rooms of her patients and steals from them. She also violently abuses her elderly patients, knowing that they would not be able to remember the abuse or report her actions.

(Source: Tokyo Ghoul Wikia)