Kumagawa Misogi, commonly referred to as simply Kumagawa, was a nihilist who believed that there is no point to life or a reason why one had to be born. He has absorbed all the negative aspects of the people he met, failing at everything and losing to everyone at everything. Medaka attempted to reform him, like she had done to her other classmates, but Kumagawa proved to be beyond her influence. Medaka described him as a compulsive liar who places no meaning in trust or doubt. As a negative person by nature, who could kill a person just as easily as he could breathe, Kumagawa thinks nothing of the lives of the people around him and could easily take them away. Despite the immensely negative personality he possesses, he has a purely positive outlook regarding himself and is always seen smiling. As a child, he was tested for abnormalities, but was believed to be normal. His minus, "All Fiction," allows him to erase the existence of things; this includes things with or without form, injuries, his own "aura" and other minuses, as shown when he tried to make Emukae's minus become nothing. (Source: Medaka Box Wikia)

A first year who graduated from the same junior high school as Kumiko. Influenced by her father, a professional, she has been playing the trumpet since she was little, so she continues in the concert band club at Kitauji High School. She is stoic and has a sense of pride in her trumpet skills, though she still respects her upperclassmen. After their junior high won a gold at a concert band competition, she and Kumiko had a falling-out. (Source: ANN)