and Aster as the name implies is a star ! he didn’t have much of a home when he first formed as much as just a little piece of space he didn’t move from until he was the equivalent of a preteen, he quite honestly doesn’t remember much of it and that’s mostly because there isn’t a lot to remember, there’s not a lot of stimulation in open space after all, the most he got was just seeing meteors pass by and some dust clouds with pretty colors so until he was about a preteen he was pretty dormant and basically asleep until a stray asteroid gets a little too close and wakes him up, so there he is all alone and fully aware for the first time ever, and i honestly still don’t have the part where he gets a hang on how to move around and getting to earth but he does after a few years, he has his whole thing and because he as the very least looks like a normal fire monster on earth he gets bullied down towards the underground, this also after like a year or two which to him didn’t seem like all that long while still in space but he finds that the rare interactions he has with people leave him exhausted anyway, so yaay he's with others that at least look like him right:D?? but the thing is that even though monsters are waayy more resistant against his fire than people on the surface its not like they can touch him for any longer than a minute so my boy is still alone af and in fear of hurting people until he meets a skeleton who finds him interesting, this monster is obviously gaster (because im unoriginal) and like im not going the monster experimentation I actually wanna go the wholesome route but also i still dont know how to write it without making Aster Gaster's eldest adopted son who doesnt forget about him after he fcks off into the core because he's technically not supposed to be there, but what basically happens during that time is that while Gaster is creating Sans and Papyrus he also makes Aster a skeleton body so he doesn't burn everything and everyone he cares about, so that happens and rn im between making Aster fck off or stay with sans and papyrus