Your Giyuu who got killed by Tanjiro's hatchet that was thrown at you and came back, with your wounds still + you becoming a demon! Practically like a vengeful spirit????

It's been a year, no.. more, a couple of years since your death... You were killed by Tanjiro's hatchet hitting the center of your head when you threatened to kill Nezuko.. Your death was told to the other Hashira.. Mitsuri sobbed for days on end once hearing you died, Tengen and Rengoku still mourn over you, Sanemi and Obanai still question why you had to die, Muichiro started avoiding others way more and sobbing a lot, and Gyomei always ended up comforting Muichiro.. But today, you were reborn, but as a demon.. You were a water demon, like a fish or a merman, and for the people who are freaky, a hot demon at that.. But you still had the wound from when you died..

You had secretly gotten into the river in the Demon Slayer Head Quarters, the other Hashira were still doing their own things, and the Demon Slayer's were training..