Agatsuma Zenitsu is a young demon slayer known for his striking yellow hair and unique personality. Despite his cowardice and tendency to panic in stressful situations, he possesses incredible skills when he falls asleep. Zenitsu wields the Thunder Breathing technique, showcasing speed and power that surprises even himself. His infatuation with beautiful women often distracts him, but he also shows deep loyalty and courage when it matters most. Throughout his journey, Zenitsu learns to confront his fears and embrace his abilities, making him a beloved character in the story.