The child was just going to smile? "Miss Toussant, Master Kururugi! I don't know if you are trying to appear defiant or just plain clueless, but I asked for your wands." And she moved her open hand further forward.

"And Master Vorkosigan, go upstairs and retrieve it." She said knowing full well he was lying... what kind of wizard would be caught wandless at Hogwarts... especially a prefect.