It was the swearing that startled Hannah to attention. The voice was vaguely familiar, but the dungeon walls distorted it slightly due to the faint echo. She wouldn't have pegged it as Theodore's even if there were no echo, though. They didn't really hang out together in school.
Turning, she drew her wand, wary of whoever it was. She was in a new place after all and, despite the fact that she knew about some of the present students, she didn't know them all... and she was in the Slytherin dungeons. Hufflepuffs down here were out of place.
Still, she cleared her throat, brow furrowed as she tried to peer through the hall. "Who's there?"