Yutori Kokorogi

A shy girl who used to get bullied in primary school that participated in Tomodachi Game alongside her friends. She is considered to be weak and helpless so she is oftenly used by Yuuichi Katagiri in order for his plans to succeed.

Is one of the traitors of group C

She has a second personality that she keeps deeply hidden from her friends is dark and twisted. Yutori has no qualms about hitting her own mother and is actually very rich, though it is unknown where she gets most of her money from. Yutori is an unstable person as she is insanely obsessed with Yuuichi, even using her own money and attempting to kill others in order to make Yuuichi love her. This side of Yutori has no loyalty to any of her friends, even Yuuichi. It is unknown when Yutori developed her obsession with Yuuichi, however it was revealed in the manga that she knew Yuuichi before he met her in high school.