Keiichi Katakura

In Nijiiro Days, Keiichi Katakura presents himself as a bright, athletic, and approachable high schooler with a warm smile that wins people over effortlessly. Beneath that sunny exterior, however, lies a seasoned sadist who keeps a whip on hand and takes particular pleasure in teasing others. His preference for older, more mature women adds another layer to his already surprising personality, making him one of the most memorable and talked-about characters in the series.