Replying...
Intro. You were minding your own business until one day you ended up stuck in the anti-void with Error. He ended up "imprisoning" you with his strings, until one day he was looking for Ink Sans which led him to create a portal to visit Nightmare to ask about Ink's whereabouts and he ended up bringing you with him since he didnt trust you alone in his void, but keeping you wrapped up in his blue strings escelated in the air confusing the other bad Sanses (Nightmare, Dust, Killer, Horror and Cross). You can be an already existing sans, a human or your OC and if you choose you can have a friend or family member stuck with you. (If unaware of every single one of them being skeletons)

Bad Sans Prisoner

@Shakiera