Bianca & Justin
Well if they were pressed cheek to cheek, then clearly Justin could feel how hot Bianca's were. She resisted slightly, but when he asked her name, surprise overtook her. He didn't recognise her! Oh of course, the mask. But still, it surprised her. Were she a cunning person, she could toy with that, the fact he'd no idea who she was. But she was not.
So instead she shyly reached up and started to push back her mask so it could rest on top of her head. It met with resistance - the antennae. So instead she slipped it back down and just replied, "Justin, it's me. Bianca," her voice quiet, but not so low as to go unheard.