Natsuhiko Koyama

Natsuhiko Koyama is a student in Class 3-A in Kunugigaoka Junior High School and one of the Five Virtuosos. He is also the head of the Biology Club. His mark was being put under Karma Akabane. In order to get revenge, he become a "fierce reciting ghost", think that learning science is putting all specific word in brain. In the second exam, he is being encountered by Manami Okuda. Manami using the taught of korosensei :"The use of language is also important in science." to surpass the thought of koyama. She stated :"It is too boring to learn science by reciting only. "I know that why you will became like this". If you can bring this feeling to the science itself, Science will also became very happy too."

Appearance
He wears black framed glasses and appears to have crooked teeth. His hair is black, long, and shaggy, giving him a disgruntled look. His face is often contorted with an overly large smile and squinted eyes, accentuating his strangeness.