Kaguya Gekkou

Kaguya Gekkou is a senior high school student. She has very light purple long hair. She always wears a mask. She is very clever. She can easily compute the trajectory of a rocket heading for the moon. By contrast, she has a very weird personality and is apathetic about many things. She used to live with an old man and an old lady, but then they just vanished one day. She is very untidy. Her past is closely connected with that of Tsukasa.