The sorceress Warini picked up the aura of something magical. Yes, there it was, being carried by one of the mundane girls. (Not entirely mundane, as she had an aura of someone not in their original form, but not a spellcaster either.) Warini made a tiny gesture with her head in Erin's direction, and her experienced adventuring partner Bellarosa the thief picked up on it immediately. Making sure Erin was looking elsewhere, the sorceress mimed taking out a phone. Bellarosa gave a slight nod.
Erin wondered what the transformed D and D players would do in the school environment. The former Billy, now a redhead, squeezed by her in the crowd. That, Erin thought, is a ridiculous outfit!
Erin got to the cafeteria and pulled out her phone. Or tried to. It was gone.
Warini took the phone from her thief companion's hand. The dwarf and the half-ogre were crowded round. "Well. well, well" said the sorceress. "What have we here?" She grinned.