It's something of a relief that none of the students are children. She's seen enough of that elsewhere. She still feels sorry that they're caught up in a battle that should have ended with the death of the evil wizard Hermione told her about.

She's putting down the last of bottles when she turns at the sound of Harry's voice. She has never heard of the Boy who Lived, either through reading another world's fiction or knowing much about his world's history, so he gets a polite smile, but one that lacks recognition. "Yes, we're friends." She offers him a hand. "My name's Adia Costas. I helped Hermione get a few items she needed for a shielding spell, and then she sent me up here. I don't know any magic, but is there anything else I can do to help? I've done a lot of medical volunteering."