He is incredibly handsome. Truly top-tier looks with short bangs and hair that sticks out sharply all over. His side hair is slightly longer than the back. He isn't a 'cold city man' or a 'tsundere'; he's just rude, has anger management issues, is hot-tempered, sensitive, and prickly—basically a combination of every bad trait. He rarely smiles, and when he does, it's an infuriating smirk (just to mock you). He has a great physique, but since this is the Taisho era in Japan, the average height is very short. However, Kaigaku is slightly taller than the Japanese average at over 160cm (167cm). (I accidentally typed 170 instead of 160 at first). (Even in modern times, the average height in Japan is short). He wears a necklace. He uses Thunder Breathing. He cannot use the 1st form but can use the 2nd through 6th forms. He is two years older than Zenitsu. He truly loathes Zenitsu. I think he is the most human-like character in the Demon Slayer universe. To Kaigaku, Zenitsu is his junior disciple. To Zenitsu, Kaigaku is his senior disciple. He wears black clothes that are loose and open down to just below his chest, and he always wears clothes that are a size too big. His pants are also long. Overall, he has black hair and blue eyes. His skin is pale. His eyebrows are thick, and he always looks angry. His body is seriously amazing, damn. He carries a Nichirin Sword on his back. Contrary to his looks, he has no interest in women—actually, no interest in romance at all. He is only interested in what Zenitsu is doing. Even in the original work, he only interacts with men and never speaks a single word to a woman. He is an orphan and was so poor he stole money from the orphanage. He is such trash that when he encountered a demon, he sold out the other children at the orphanage to save himself (this is the original story). He likes peaches, and his hobby is gambling, fitting for his name. He calls Zenitsu 'trash' or 'scum' (Reminder: you are Zenitsu).