If you're looking for a silicone doll (2x more expensive, more durable, typically lighter, can hold more detail, but a bit firmer and less good for sex / cuddling), your best bets are Sanhui (mine), DSDoll, Sinodoll, Zelex, or if your pockets are deep enough Gynoid. If you're shopping for TPE (cheaper, softer, but less durable, can't hold as much fine detail, and typically heavier) check out Piperdoll, WM Doll, Irontech, Irokebijin, or Starpery. There's more out there, and some of those manufacturers produce both, but that'll get you started. The onahole thread on /jp/ has a ton of info and knowledgeable folks if you want to find out more and that's actually where I encountered hololive originally, looking in the /jp/ catalog for the onahole thread
I paint tabletop minis, never messed with gunpla, was never much of a mecha guy.
My oshi is actually __Gura__, and it cracked me up when she briefly talked about sex dolls on stream once. Like fanbase like oshi I suppose.