Lisa & Rosa
Very similarly, Rosa wasn't the sort to be sentimental, even around Christmas. No bad memories, it just wasn't who she was. She was feeling a little more festive this year, with a girlfriend and invitation to a real big thing with family and friends. The squad usually parted ways for Christmas and she'd never really minded but this year without them or her family she'd been a little cautious. She was looking forward to it in the end, though.
She actually kind of liked Alex's extended family.
She'd gone to the bonfire just to check out the lights and stuff, quietly appreciating pretty crap like that and not wanting anyone to know about it, just wandering around a little before she noticed a really hot chick who definitely looked a little sketchy. Her instincts told her to pay attention, so she did, keeping an eye out for her as she milled around. Not outright following but definitely not so subtle as to not go unnoticed. She'd come up with an excuse if she needed to.