A 16-year-old high school student hailed as a genius by many people. He wins the Tezuka Award for his manga Large bander, after which Mashiro and Takagi declare him their rival. Although Mashiro and Takagi view him as a rival, he is very friendly upon meeting them and states he is a fan of theirs. He moves to Tokyo to work on the serialization of his manga Crow on the condition he is able to cancel one series in the Weekly Shōnen Jump after becoming the magazine's most popular author. The head editor has described the difference between Mashiro and Takagi to Nizuma is "love of manga", indeed, Nizuma seems to have been obsessed with and drawing manga since he was 6,and makes loud sound effects with his mouth while drawing. Nīzuma tends to act conceited because he is hailed as a genius; however, after working on Crow for quite a long time, he is more humble, even claiming to "not be good enough of a Mangaka to be judging other people's work" when asked by his editor to judge for the Golden Future Cup. He works under the direction of the Weekly Shōnen Jump editor Yūjirō Hattori.
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