Arnold was thrashing about in the secret room. He had been there many a time especially after the tragedy that happened to the only one he had ever loved. He stopped, his werewolf side slacking off a bit. He remembered her perfectly, although it had been quite some time since he had seen her. Then he remembered the many faces of the Death Eaters that killed her. He let out a howl and practically destroyed the room.
He cocked his head, eyes burning red as he looked at her. The thirst for blood overtook him, and the voice telling him not to bite was drowned out by the rage built up inside him. He didn't care who it was, he needed to unleash his anger on someone, and he also needed to quench his thirst. He ran at her and tackled the person. He bit her neck and drank deeply. He let out a howl before smashing out the hidden door.