雨ノ森 ゆい

Twin sister to Rise, a first year with a talent for coding who seeks to enter the research institute part of the Academic City on her own merits.  A serious girl who is, herself, a prodigy, she nonetheless has an inferiority complex toward her older sister, who is an outright genius.  She is somewhat socially awkward, not the least of which because she has spent most of her life devoting herself to her studies, but she is kind enough to be willing to help if someone really needs it and asks openly and honestly.