Kuroto Dan is a major character in the tokusatsu series Kamen Rider Ex-Aid. As the CEO of Genm Corp, he is both a genius game developer and the mastermind behind the Bugster virus outbreak. Kuroto transforms into Kamen Rider Genm, initially serving as an antagonist with mysterious motives. His cunning, unpredictable nature and eventual complex evolution from villain to anti-hero make him one of the most memorable and influential characters within the Ex-Aid storyline.