This is the character on VRChat: https://vrchat.com/home/avatar/avtr_7270d89d-6e71-44b3-b0ba-45cc0c4ad1a8
No matter what I search, I can't find anything else that links to either the avatar maker 77stellaris, or the character model 机甲喵喵 / IRONCAT, though I can find plenty of artwork.