He had known he was going to be attacked as soon as possible. Apparently there was something really satisfying for the first years to try and attack the Head Boy because in DADA class they had done the same. Failed but at least tried.

And he wasn't dissapointed when he saw little Ariadne shooting green paint at him. He waved his wand and non-verbally casted the shield charm to block the spell. He grinned at the girl as he lifted the charm again.

It would take more to take him down this early in the game.

And where were his Gryffindors?