I was an early content creator in Second Life. Very much an experienced adult, not an impressionable child, and I was doing it to learn how the code works so had an inbuilt level of detachment.
Nonetheless, my brain identified with my avatar so thoroughly that I occasionally walked into doors (in real life) because my brain assumed I could fly through them 😳 I gave it up after going for a walk in the woods, when I realised I was seeing my surroundings as interlocking shape layers (like game content). It took a big effort to re-engage with the landscape as a normal human.
The game was teeming with creepy players who, predictably, reacted angrily to being told nicely or aggressively to fuck off.
This experience feeds into my conviction that video games are not harmless but, here, I'm just trying to answer your question. The girl's virtual 'rape' could have been utterly shocking to her and I believe she may have felt it as a real event - without the physical impact, but I'm not sure her psyche would've known the difference.