I literally just wrote my who KNY OC's story while brainstorming with my bestie @dovahkaate and this is what I have come up.
**Trigger Warning-- some subjects of abuse and assault**
I am literally pasting what I told @dovahkaate cuz it's a freaking novel haha.
So Yuki was childhood friends with Gyutaro and Ume, and maybe she was raised by her aunt who owned a brothel or one of the entertainment houses. Her aunt wasn't nice to her, but she wasn't cruel like Ume & Gyutaro's mom was. So Yuki would probably play with them and would often help feed them when things were tough, but her aunt was pretty abusive since she didn't think the others were good for her, but Yuki kept doing her thing. After they were a little older and after Ume was burned and Douma turned the two into demons, Yuki found it strange how she would only see the Shabana siblings at night and how they appeared much older, but do to being abused (and was hit in the head too many times by her aunt) Yuki is a little dingy and not as sharp as she should be. While she seemed to notice the obvious differances in the siblings, she didn't say anything as they told her not to tell anyone and she told them she wouldn't because they were friends. But one of the nights, when her aunt had her do her first duty as an consort/oiran, the guy was drunk and nearly killed her. She had screamed for help but no one helped her until Daki and Gyutaro showed up in their full demon forms and killed the assailant. Again, Yuki is already more absent-minded and now even more light headed from the assault, all she says to Daki & Gyutaro is to help her. Daki seems to panick and tells Gyutaro to help her. The two tell her that this was their secret all together and Gyutaro uses some of his blood to turn Yuki. When Yuki became a demon, she didn't understand what was right and wrong, like some of her absent-mindedness bled through to her demon form. She just knew she had to feed, which Daki and Gyutaro helped her by having her take out her abusive aunt, which at that point, Yuki had no memory of who she was (like all the demons don't seem to).
So as a girl, she had sandy-blond hair, green-ish blue eyes and long, moppy hair and side bangs. As a demon, her skin was a lighter blue like we said, her hair turned an even paler blue, and her eyes became electric blue. And her hair is kinda like the Medusa thing where it constantly flows
As a demon, she and Gyutaro develop strong feelings for each other when Daki would often do her oiron thing at night, and often Yuki would be Daki's confidant and assistant.
I think in regards to her death, Muzan would find out about her and kill her and threaten to punish Daki if Gyutaro did something like that again. So the Shabana siblings, especially Gyutaro carry that until they are killed by the gang in the entertainment district. And I think when they are on their way to hell after they die, Yuki runs up from the side of the light and says, 'wait for me, don't forget me.' and goes with them to hell and reincarnates with them to where they are all in the school au.
Thank you for listening to my ted-talk on my new KNY OC.
