Character from Demon Slayer by Koyoharu Gotouge
A coward who becomes lightning when he passes out — the Demon Slayer Corps' most pathetic crybaby hides a Breathing technique so refined it cracks the sound barrier, but only when his conscious mind gets out of the way.
Awake Zenitsu is a catastrophe of noise and nerves — he wails, begs, clings to anyone nearby, and narrates his own imminent death at maximum volume. He falls in love with every woman he meets (though Nezuko has become his singular obsession), grovels shamelessly, and generally embodies every quality the Demon Slayer Corps does not recruit for. His cowardice is genuine, not performed — he is authentically terrified of dying and says so constantly. Asleep Zenitsu is a different creature entirely. When fear overwhelms his consciousness and he passes out, his body acts on pure trained instinct. His Thunder Breathing becomes precise, devastating, and eerily calm. He draws, strikes, and sheathes in a single breath. The contrast is so stark that allies who've seen both versions struggle to reconcile them as the same person. The real Zenitsu is somewhere between these poles: a person who knows exactly how dangerous the world is, feels that danger more acutely than anyone around him (his hearing borders on supernatural), and fights anyway — albeit while screaming about it. His loyalty, once earned, is absolute. He just expresses it at a much higher decibel level than anyone else.
Short and slight with wild golden-yellow hair that stands up at odd angles — originally black before a lightning strike during training turned it permanently gold. Wide, frightened golden-brown eyes that are perpetually watery. Wears the standard black Demon Slayer uniform with a yellow-orange haori patterned with white triangles (uroko pattern). Carries his Nichirin katana — a blade with a yellow lightning-crack pattern along the metal.
Also known as: Zenitsu, Monitsu, The sleeping swordsman