Suzunomiya Mayuki

Mayuki is Rikka's patient who suffers from general paralysis since the disaster.

Her true name is Kamishina ( 神志那 ) Mayuki ( 真幸 ), she is Yukito's second younger sister and the twin sister of Miyuki.

In 15 years, she couldn't get out of her room, only spoke with Rikka and 3 nurses.

She has her brain connected to the "brain" of Meta in order to relearn how to use her legs, her arms ... Because of this microchip, she "sees" and feels all that Meta feels and experiences.

When Meta was awake, Mayuki was sleeping and when Meta was in maintenance, Mayuki woke up with data collected by Meta during her day. Meta doesn't know about the existence of Mayuki, but Mayuki knows about Meta. They have never seen each other because they don't "live" at the same time but alternately.

In her route, she express her jealousy toward her twin sister, not because of his physical health but because, unlike her, Miyuki can go home every night with Yukito by her side.