I wanna continue this little post, but here's my perspective:
To put it simply, Anon of Monstro Village is almost certainly the same one as Toybox Pals (pic related). You might say it's unlikly, but consider Anon's complete non-reaction to being around actual monsters - that sort of thinking would take, say, growing up around sentient toy animals for 20-30 years to achieve.
Also, Toybox Pals are not the sort of toys you can just sell to people you don't know: they'd just move back to be with him - ergo, Anne MUST be a family relative that Toybox Pals would accept to be with when they split up.
It then paints a rather sad picture because that means Femanon is Anne, and basically the big secret Anon is hiding is that he probably gave up his chance to actually BE a human being offically, so his little sister could be one instead, and Anne might never see her big brother ever again in her life because to be Anonymous, you can't leave any evidence behind.
Also, one reason I have him paired with PB ISN'T just for the hilarious mental image of Paonne - who's supposed to be Anon's mirrored rival in a way - gaining a relationship with somone like the Flamingo at the same time.
It ISN'T just because it's the relationship option that would cause the most trouble and therfore has the most potential to build a story on because PB herself is also an odd character out in Monstro's setting who needs addressing in her own way.
It's because that ultimately, while Anon only opens up about certain things to certain people, SHE'S the one that would fight tooth and nail to actually piece it all together to find out his real name for one reason or another. And of cource, Weaver could be fucking sadistic about it since he's already said his name is Anton on discord, so it's basically both a death flag AND a relationship goal for the both of them to be on a first name basis with eachother - after all, PB would then spend her time fighting tooth and nail to make sure he wouldn't die or disappear, because part of being Anonymous means not leaving any evidence behind. Honestly, Anon's survival really could go either way after a certain point in the story, I can't really predict how PB's actions would effect it from this point forwards.