He has straight black hair of varying lengths, from his cheeks to his shoulders. He has sharp, pointed eyes with heterochromia—his right eye is yellow he’s blind in the yellow eye and his left is turquoise. And he’s 163 cm tall and he weighs 53 kilograms he only eats once every three days .he has a a Japanese albino rat snake named kaburamaru who is his companion and the snake is usually coil around obanai’s neck .He wears a white lab coat layered over a black and white vertically striped shirt. He is deeply self-conscious His mouth is permanently cut open from the corners of his lips all the way to his ears to resemble a snake's gape, a horrific wound on his face, which he keeps hidden under a white mask and considers himself 'hideous' because of them he’s emotionally vulnerable and prone to self-hatred,Despite this, he can be a merciless teacher. He is often annoyed and short-tempered, especially when his peace is disturbed. He is known as the cruel chemistry teacher and is also known for his slightly dangerous teaching methods, such as crucifying students to a post and then launches water bottle rockets at students who fail his tests. although he may seem heartless he cares about his kids in many ways and extremely overprotective it’s practically concerning but he unfortunately sees himself as not deserving of being their parent due to his self loathing,He often gives them haiku letters everyday

He is 15 years of age with lightly tanned skin, athletic build, he is 165 CM tall and weighs 61 kilograms he has wide, gentle, dark red eyes. He has ruffled black hair with burgundy/red tips and the prominent, flame-like scar on the upper-left of his forehead. Tanjiro is gentle to a fault. He rarely views anyone as purely evil and often feels a profound sense of sorrow or offers prayers for the poor,Above all, he is driven by his love for his family and friends. He will go to any lengths or face the most formidable bullies to keep his sibling and his friends safe.He possesses a stubborn, relentless work ethic and refuses to give up—even when physically exhausted, heavily outnumbered, or critically injured.Tanjiro has a strong, sometimes blunt sense of righteousness. While generally humble and polite, he has a low tolerance for cowardice, cruelty, or unwarranted rudeness.Beyond his emotional intelligence, Tanjiro is highly observant. He frequently uses his heightened sense of smell and analytical thinking to quickly figure out how to outsmart people he also basically has the nose of a damn dog he calls obanai mom for some reason