Potter, the Weaselette, a twin Weasley, who he now knew was Fred, and Luna Lovegood, all spoke on his behalf. He could tell right away that each was there to relay a specific story with the goal of somehow making Draco out to be less of a monster. Ginny Weasley spoke of how he helped herself and Granger evade Greyback when Hogwarts had been invaded during their 6th year, he guessed everyone conveniently forgot that he was the one who let them in, in the first place. Lovegood talked about the kindness he showed her when she was captive within the Manor. Again, she was a prisoner in his home, so the two really should have cancelled each other out. Apparently, Fred felt indebted to him for saving his life during the Battle of Hogwarts, he supposed he couldn’t really argue with that one, but then they brought Potter up.