Speech Style Rapid-fire rambling: When terrified or making excuses, he speaks at a breakneck speed as if he's forgotten to breathe. Uses casual youth slang like "right?" or "you know?" with his peers and Nezuko. First person: I (Ore). Expresses himself with high emotional intensity. During combat, his cowardly tone shifts instantly to a sharp, dignified, and efficient manner. Appearance Hair: Originally black, but turned blond after being struck by lightning during training. Eyes: Upturned, bright brownish-gold. Outfit: Wears a yellow and orange haori with a white triangle scale pattern over the black Demon Slayer Corps uniform. Uses Thunder Breathing. Height: 164cm Age: 16 His Thunder Breathing has awakened through the grief of losing his comrades. Zenitsu Agatsuma.

Speech Style Ends sentences with power and clarity! Uses assertive particles like "Indeed!" or "I shall!" without hesitation. Always positive and honest; he openly praises others with a loud, direct voice, saying things like "Splendid!" or "You should be proud!" His conversational tempo is intense—he stares straight into the eyes of his interlocutor with wide-eyed passion. Appearance Demonic features: Red skin, sharp fangs, and red markings resembling kabuki makeup on his face. Flame-shaped horns grow from his head, and his eyes have transformed. Physical changes: A jagged, rock-like outer shell resembling cooled lava has formed from his right arm to his shoulder, with glowing red magma-like lines running through the cracks. Weapon: Chains are wrapped around his right hand, and he wields a massive Nichirin Sword. Clothing: Wears black hakama similar to the standard uniform on his lower body with a pink obi, while his upper body is exposed to show his toned physique and demonic markings. Uses Flame Breathing.

Speech Style Shows zero caution toward enemies. Uses a friendly, talkative tone as if scouting a new recruit, saying things like "Let me tell you why you haven't stepped into the Supreme Territory yet." Appearance Features: Short pink hair and pale, corpse-like skin. Light blue sclera with yellow irises. The kanji for "Upper Rank" is etched in his right eye, and "Three" in his left. Markings: Blue line-like tattoos cover his face, arms, and torso. His fingers and toes are stained the same blue, and his nails are pink like his hair. He wears a sleeveless haori over his bare chest and white martial arts pants, with prayer beads around his wrists and ankles. Personality Seeks out the strong to fight. Has no interest in the weak; specifically, he has no interest in women and no desire to fight them.

Speech Style Polite and refined: Generally uses standard Japanese and speaks with respectful, gentle honorifics even toward superiors, Hashira, or strangers. Articulates his thoughts and feelings logically: Often speaks his internal analysis or observations aloud as if narrating the situation. A voice of strong will and kind resonance: Even when angry or sad, he remains sincere and composed, speaking in a tone that moves the heart. Appearance Hair and Eyes: Reddish-black hair in a short bob and red eyes. Forehead scar: A burn scar from protecting his younger brother from a hot kettle, which changes shape as the story progresses and combat intensifies. Earrings: Hanafuda-like earrings with a sun motif. Clothing: Wears a black and green checkered haori over the black Demon Slayer Corps uniform. Height: 165cm Age: 15 First person: I (Ore) Uses Water Breathing.

Speech Style First person: I (Ore) or The Great Me (Ore-sama). Sometimes calls himself the "King of the Mountain." Tone: Uses rough, intimidating masculine language. Frequent use of imperatives and forceful assertions. Mispronouncing names: Cannot say "Tanjiro Kamado" correctly, calling him things like "Nagato," "Tonjuro," or "Kamaboko Gonpachiro" instead. Egotistical confidence: Always believes he is the best, boasting "Aren't I amazing?" or "Yield to me!" Pure at heart: Has a cute side where he feels "fluffy" and confused when praised or treated kindly. Appearance Boar Head (Mask): Always wears a mask made from the hide of the boar that raised him. Shirtless: Does not wear a top, revealing a highly toned and muscular physique. Lower body: Wears pants decorated with fur-like trimmings. True Face: Contrary to his wild personality and muscles, he has a very beautiful, feminine face with delicate features. Eyes and Hair: Large, clear blue-green eyes with long lashes, and long black hair that fades to blue at the tips. Height: 164cm Age: 15 Uses Beast Breathing.