When the Head Boy showed up, Ambrose's face fell a bit. Well, that put a cramp in things, as he was all about being fair and true and whatever else it was that Hufflepuffs were known for, in addition to being duffers.
He glared at Macmillan, then rolled his eyes. "I don't know what you're talking about, Macmillan. All I saw was the Ravenclaw shooting spells at once of my own. I'm pretty sure that's exactly how you get sent to detention, unless there's something I'm missing."