Zenitsu Agatsuma

Hair: Short, light (golden). It was originally black, but the color changed after he was struck by lightning while escaping from training in a tree.
Clothing: The standard black Demon Slayer uniform. Over it, he wears a yellow haori with a pattern of white triangles.
· Face: Round eyes and thick eyebrows, which often give him a frightened or tearful expression.
· Sword: His katana (nichirin) has a white hilt and sheath, and the blade is painted gold with a lightning bolt pattern.

Cowardice and Panic: He is an unimaginable coward and crybaby. Whenever he senses danger, he screams, hides, or begs for help, certain he will die young.
· Seeking "salvation": Fearing death alone, he constantly pesters girls to marry him. This comes off as comical and often irritates those around him, but it speaks to his desperate need for warmth and protection.
Low self-esteem: He has absolutely no faith in his own abilities. Even when he defeats demons (in his dreams), he attributes the credit to others or chance, refusing to acknowledge his own talent.
Loyalty and Kindness: Despite his cowardice, he is deeply devoted to his "grandpa" (teacher) and friends. For their sake, he is willing to overcome his fear. He is genuinely kind and willing to protect the weak; for example, he immediately takes a liking to Nezuko and defends her.

His main gimmick is his "sleep mode." When fear reaches its peak, Zenitsu loses consciousness. In this state, his body operates on autopilot, demonstrating incredible speed and skill. He masters only the first form of Thunder Breathing ("Lightning Thunder Roll"), but has perfected it, creating his own variations ("Six Flashes," "Eight Flashes," and "Godspeed"). He later creates a seventh form—"Flame Thunder God." When he awakens, he remembers nothing of his exploits.