Lily listens to him speak. She's very quiet, processing - and there's a moment when he compares muggleborns to sentient beings that her expression darkens considerably before he continues and she realizes that he's not bringing her down, he's bringing them up to the level of humans. Strange for a pureblood. Very strange. James and Sirius, for all their bluster and enthusiasm, still fall into those problem areas (and others) often. She also looks bewildered, and almost overwhelmed, as he finishes up speaking.

No, scratch that. Very overwhelmed.

Still, it looks like she believes him. "He's not Minister for Magic but he's something else, isn't he? There's no way someone like him just doesn't exist."