Nia admittedly had got a bit distracted from her shield charm as she watched her brother. She wasn't sure what she felt about it either. In one sense it totally served him right, and she would be smirking were it not for her fear of the Professor. At the current momnet though, he looked so defenceless, and she almost wanted to go and hug him. Almost. She wouldn't though. No way.

At the professor's question, Nia smiled and raised her hand. "Densaugeo is a hex. It causes one's teeth to grown enormously, quite useful defensively if your opponent can't yet use non verbal spells."