Mayu Sumimori

Mayu Sumimori (住森 麻夕) was in charge of the accounting and intelligence gathering for the CCC, in which she went under the code name 11 (Eleven). However, she's not good at detailed work and often makes mistakes, and was later left to be killed by the organization, but she survived. She comes from a wealthy family who had connections to the CCC.

She used to have a thing for Kirio Kikuhara, but her feelings for him have died down after Plan B didn't go smoothly. Now, it's Takeshi Makimura who's on her mind.

She has an inferiority complex due to having beautiful parents and sisters. She doesn't feel as pretty as her name sounds.

Appearance
Mayu is a young woman with a light and fair complexion. She has straight dyed light-blue hair, which is neck-length with middle-parted bangs. She has light colored eyes and wears makeup. After some events, Mayu gains weight and develops a fuller figure and plumper lips. She occasionally has her hair tied into a ponytail with her bangs held back by two hairclips at each side, in which her hair has grown longer. She has inherited most of her father's appearance, and is noted to have looked exactly like him before he had plastic surgery. Mayu also doesn't feel beautiful and is planning to get plastic surgery as well.