Keefer looked around to make sure they had plenty of room. The others seemed to be giving the Captain/Prefect pairing a wide berth. He looked over at Arya, wondering who should go first. "I guess I can try first, since neither of us probably care."

He absentmindedly practiced the 'd' motion Romanos preferred. He had never used it with this spell, so he didn't want to mess up. I think I'll try a verbal spell first just to get the hang of this new wand movement. He was still somewhat struggling with nonverbal spells, so adding to new things into one incantation didn't seem like a good idea.

He got in a ready stance and checked to make sure Arya wasn't distracted. It just wasn't polite to shoot a spell at someone that wasn't looking. Clearing his throat, he executed a 'd' pattern and said, "Expelliarmus!" A jet of light shot at the Prefect.