I don't see Hannah like that at all! Setting aside her appearance, she strikes me as someone with typical ADHD inability to activate a brain/mouth filter, and socially awkward in that she doesn't calibrate what she says very well. She's being isolated and treated badly by Stephen and some of the others so won't be at her best. The only evidence of her apparent inappropriate flirting is the reports of people I don't really put a lot of credence in - eg what seems more likely, that she slightly awkwardly quizzed someone about their Ugg boots in front of a group of people by looking at fluff on their socks, or that she randomly decided to give a man a foot rub (that he just went along with)? Other than that, it seems that everyone but her is allowed to joke with each other. (And yes, I have ADHD, and commit social faux pas all the time, but am genuinely not an arsehole, so I am relating here.)