@red-pancake Dude, what do you mean 'fix it'? There's nothing in the model you brought that could be kept for later, you brought the Tripo3D model or something like that. If it were just about adding a rig, that'd be fine, I'd do it right now, but it's not just that. The model you brought doesn't have good retopology, doesn't have good texturing, and even the body structure isn't good. It would be better for me to create a new model using the image as a reference than to try to 'fix' this one. Man, to be honest, I wanted to say a lot more, but everyone had to start somewhere, and you did try to help, even if it ended up being useless.
To answer your question, no, the model isn't rig-compatible, it would work better as a static model, an object in the scene. No, actually, forget what I said, it won't even work for that, because of the face count on the model is high (1,998,454).
Anyway, good luck finding the model or something related from the artist.