What it all looks like to me is this: She's an autistic, 100% asexual who learned to fund her expansive and expensive cosplay lifestyle by showing off her slamming body, but was losing attention from stuff that was non-explicit. To make up for that, she started doing performative masturbation for the views, adding the heavy breathing and close-ups on her gorgeous pussy spread wide to keep people watching. But, being ace, none of it does anything for her. Those brief clips where she's rubbing super hard and making a face with her pussy off screen are probably moments when she's overstimmed her clit to almost have a forced orgasm, but I don't think she enjoys doing that, so that's why we've seen so little of it.
Pure speculation on my part, but seems real likely.