Chapter 5 of Deltarune altered the chemistry of my fucking brain and behold, this little joke ghost OC that spawned off somewhere, idk where, became fully realized and now here you go, an addition to the Napstablook house
They were found by the shelter one night by Undyne and Napstablook and after Undyne scared the crap out of them and Blooky pulled Wisp out of the Shelter during their minor panic attack, Carol just went WE CANNOT LET THIS GHOST GO, while Undyne was like oi, Blooky, you sure this punk ain't your cousin and like...
the stereotype of all ghosts being related aside, Napstablook actually STOPPED to think and wondered, "Oh crap what if we ARE cousins", so you mixed that all up and now Hometown has a new ghost.
They had a brief stint with schooling, then was juggled around town for a job before EVENTUALLY, they landed at Flower King and are actively helping Asgore make ends meet by being the loadbearing "WE NEED TO MAKE MONEY" asset of the shop. (also Asgore genuinely likes talking to them because they're the one being in hometown that CANNOT in any way try to judge him the same way he judges himself)
They're a ghost on the verge of transitioning so they're in a very fucky situation of "do I want to go corporeal?" and "WHERE AM I?!"
they're on the meta level of knowledge of Undertale knowledge, Pre 10th anniversary stream, and also are pre chapter 3+4 release of Deltarune, so initially they just wanted to stay a bystander UNTIL THEY SAW NOELLE AND WENT I DON'T WANT THE WEIRD ROUTE.
So now Kris and SOUL are like "this ghost hella sus" because this ghost was like lowkey following them for the first two chapters before getting their ass dragged unwillingly by accident come chapter 3. Also the Roaring Knight is on their ass. Legit, Wisp is living a Malcom in the Middle Reese subplot with these shenanigans.
Napstablook house puts Napstablook as the oldest by process of elimination on who has the most responsibility cuz no one fucking knows who's older and younger, and Wisp had to fight for their fucking life against Maddie for middle child, mainly BECAUSE they have a job now.
Also the Ruins Dummy is also in the house, but just quiet and content??? They're not dealing with dysphoria like Maddie and Mettaton. but now you also got Wisp who's starting to form an identity, until it fully blooms by chapter 5. As in, they grow their own fucking body lmao, somehow. it's Deltarune, don't think too hard on it.
I just got so fucking emo over a bunch of flowers that I had to do something. :V