大月 空

"I can't! I can't die here!"

Former leader of a team of kids from the slums. Loyal and caring towards his friends. A spirited delinquent boy. Rides a motorbike. A few years ago, he was arrested and imprisoned for a hit-and-run, but now works at Teko's research lab.

One of the main protagonists of the Ministry of Science route.

He is a digital copy of the real Ku Otsuki, implanted into the body of Seren Ezaki as a split personality.