I think that's young Jill too, I didn't think of plastic surgery, so the mole on her face always made me second guess. The eyebrows are a significant tell though.
Tying in to your discussions with
Holy Bacchus, part of me wonders if she's been raped (not by anyone significant, just someone in her past).
The stupid MC never actually looked at the support group campaign pamphlet in her room that time, and Jill is campaigning for something (although the fact that Tybalt wants to help her with it kinda diminishes that idea a bit), so it could be she's campaigning to help women who have been sexually assaulted (this game said it might upset some people, and really it hasn't hit any nerves at all yet - unless we're talking about those who coped badly with the M&J rejection...).
But it might explain why Bella is so protective of her (but then Bella is psycho so she doesn't need a rational reason to be overly protective).