Holly's face turned red and she gave Calla the Biggest Death Glare.

"Go ahead, then! Leave! When the prefect stumbles across me, I'll tell them Miss Calla Potts left me here without returning with help! I doubt they'd dock points of me for being here because of someone else's irresponsible wand-waving," she responded with her nose in the air. "Perhaps even your irresponsible wand-waving, seeing that you were the only one here."