"One of the students of Hogwarts. It was a member of this group, this Dumbledore's Army." The truth was that Rolf still didn't like the name or what it implied. It did seem like Albus was letting other people fight his battles for him, it certainly seemed like that a lot, but he wasn't about to make such a remark to Sirius Black or anyone else. This was not the time or place and he had meant it when he said he'd wanted to help. That was something he felt he need to stick too.
"I want to help however it is that I can and why--" Rolf looked a bit confused and then just shook his head. "Because what is happening here is wrong, this is why. Muggleborns have no right to be treated in such a way as this."