#i've been similarly obsessing over if people other than gaster fell in the core

[beryllineart]

Undertale ghosts are not obsessed over enough

Ok, random idea, I'm going to ramble a lot, but what if Undertale ghost monsters could possess living things?

I'm nicely blaming @eriscary for this idea because of Tear being a Sans plush possessed by Napstablook. It made me think about what other objects ghosts could possess, and why not something living?

Seriously, what with all of the AUs and stuff where Chara's ghost takes over Frisk, if human ghosts are allowed to do it, why not ghost monsters? And what would be the rules? Would the host and ghost share control? Would the ghost be able to communicate with the host? Would the ghost be able to leave whenever they wanted or would they be stuck because of some sort of thing going on? It's gotta be different than just possessing an object, right?

I think it would be easiest for ghosts to possess living things without souls (say, plants and stuff like that, brings up some questions about Flowey) and it would be hardest for them to possess other monsters. They'd be able to possess humans easier than monsters because a monster soul and a human soul can combine together (it would basically be an opposites attract, magnet type compatibility which is why monsters are hard to possess.) Actually, maybe it would be nigh impossible for a ghost monster to possess a fellow monster unless they were a willing host.

Plus, what would happen when a ghost monster became permanently bound to their living host? I mean, I think that the host would need to agree in some capacity, but if a ghost got emotional enough that that happened even without the host's consent, ohh boy. (And what if that binding happens to someone who has the power either to RESET or remember resets? What sort of paradoxical nonsense could we get into with that?)

Also, what about the damage rules? You can't hurt a ghost with physical attacks unless they're bound to a body, but if that body is something living, the host is definitely going to get that damage. What are the pain rules for ghosts anyway? And what about magic attacks? Seriously, Undertale ghosts are not obsessed over enough!

One more thing- what other ghosts and characters do you guys think would be the most fun to combine, why/how would they combine, how would that affect the story in the Underground? Seriously, give me ideas, I want to make comics!