Kaito Kumon is a major character in the tokusatsu series Kamen Rider Gaim. As Lord Baron, he serves as both a rival and an anti-hero, often challenging the protagonist, Kota Kazuraba. Driven by a desire for strength and a belief that only the strong should survive, Kaito undergoes a dramatic transformation, ultimately becoming Lord Baron, the series' final antagonist. His complex motivations and tragic backstory make him one of the most memorable characters in the series.