Zenitsu Agatsuma is a fictional character from the popular anime and manga series Demon Slayer: Kimetsu no Yaiba. He is a member of the Demon Slayer Corps and is known for his distinctive yellow hair and his cowardly personality. Despite his fears, Zenitsu possesses incredible speed and strength when he is unconscious, allowing him to fight demons effectively. Zenitsu wields a unique sword style called Thunder Breathing, which enables him to unleash powerful lightning-based attacks. His character development throughout the series showcases his growth from a timid individual into a brave fighter, highlighting themes of courage and self-discovery.