Cliona steps out of the girls' compartment, closing the door quickly behind her, and looks around, taking it all in the way one might a mildly curious scene at a fair.

"Hullo, James. Sirius."

And then, with the sort of reflexes you develop when you've spent the last three years throwing a Quaffle back and forth to James Potter, she hits a Baddock with a hex squarely in the eyebrows, which almost instantly (and pinkly) grow long enough to cover her eyes. Baddock yelps, and the spell she'd been aiming at Sirius misses its mark and hits Avery.

"Oh, very nice," Cliona says as he sprouts onions out of his ears. "You don't see that one much.

"Well, you seem to have things under control. Carry on, boys," she says, and then steps back into the compartment.

James and Sirius will just be able to hear her say, "Nothing at all going on in the corridor, Lily," before the door closes behind her.