I never talk about them really, but the list of allies Void has and works with has expanded quite a lot since the whole idea of a “council” came up. It was actually one such idea for Void that initiated Glitchedswap and eventually Dos!
He made a brief appearance in that one celebration fic with Void, but Comet (UT Comic Papyrus) is usually Void’s first interaction with the multiverse! He usually also winds up working with the other three comic papyruses, Star (US), Nova (SF), and Solar (UF), though Nova is kind of an asshole and Solar is only marginally more tolerable lol
In one of the other celebration fics we meet Wingdings, and I’ve even drawn them together before! But he was a Tale variant Gaster Void rescued, and sort of becomes like an adopted…uncle? To him? It’s strange because their age difference isn’t that great due to both of their natural aging processes being halted by the void, and Gaster’s own boys were pretty young when he became trapped. Still, after years of getting to know each other and Wingdings recovering from the psychological toll his “situation” took, they definitely consider each other family, even if they don’t directly address it.
When applicable, Chara can actually linger around Void like they can with Frisk. He can see them and interact with them, and they’d actually met when Void was very young. Chara became a ghost much earlier on in VF, and met him at the labs. I have a wip comic of the two of them, I would love to finish it one day, their relationship is very sweet <3
Ash is another friend of Void’s, whomst I’ve mentioned before! An Asriel variant who is kind of intense but usually well meaning! He considers himself like an older brother to Void, while Void kind of sees him more like an…ally mentor cousin guy?? They have a lot of mutual respect for each other!
In some variants, waaay far in the future, Dos becomes a sort of mentee of Void’s. A little like a sidekick, if you will. They wind up very close, and Void is one of the few people Dos comes to feel wholly comfortable around <3
Void is a chronic people adopter. It’s terminal /j But fr, despite outwardly usually coming across a bit terse and cold, he warms up easily and becomes attached quicker than he likes aha
Cosine isn’t entirely an UT oc, but when I put them in that domain, he is a monster who got separated from his family and universe, what tore them away affecting their coding and making them a bit visually off as well as damaging his memory so he can’t actually remember where he came from. Void unintentionally winds up a sort of adopted dad/uncle to them, and they wind up living with him for a time, traveling together sometimes when searching for Cosine’s universe, since his damaged coding makes it harder to locate.
In applicable iterations, Perp and Void actually wind up with a better, healthier relationship than Edge and Red, since they have to overcome a lot more and actually communicate once everything comes to light (Perp didn’t know Papyrus was a vessel for…too long).
Speaking of too long! I’ll stop there so this post doesn’t get out of control agdhsj