kny manga spoilers again, so anime only look away?
rubbing my hands together….
OKAY. so, I know canon has it's whole situation with how things go for tanjiro after. he loses feeling in one arm, it ages rapidly or whatever. he's blind in one eye. but… I kind of keep treating it as a PERMANENT change. his eye morphs into one like muzan's, with a demon slit pupil. the arm that grows back is duller, more gray scaled than the rest of his body. VERY pale. black fingernails, sharpened into claws. the markings from his demon slayer mark that stretch ACROSS his face, but fade - leaving more of a tattooed / burn scar look than anything else. like the imprint of what was. his hair is a deeper red at the ends, and while he's still human at the end he's… still kind of more. human but more, human but... not at all too. left over traces of muzan. overpowered by tanjiro and everyone PULLING HIM BACK but he… is irrevocably different.
he'll age slower too, because I like to play with him NOT dying at 25 with the others. ( which ik people are back and forth on?? ) he'll age slower, jump higher, hear farther, smell farther. he's muzan's ideal, demonic, but he's undeniably human. he's tanjiro, but muzan's ghost and features haunt him when he looks in the mirror. he wears an eye patch, covers the demon eye ( which is a much deeper red than his own, almost blood red over the ruby-maroon ). he files down his nails, which are sharp now. at least consistently on the demon arm side. the nails never stop being black. and he has fangs. sharp canines that could tear into flesh. it's a BIG adjustment, and he's… just different. he's tanjiro, but he's a little less tanjiro too.