Faolan makes another little 'hmm' noise in response to the other man's words, and to the casual nonchalance that Sirius is offering him, but he's known the other man long enough to be able to recognize how uncomfortable he is with the situation. And Faolan isn't trying to make him feel as such. He just wants to understand.

He steps closer to Sirius himself, so that he might speak quietly with him, lowering his voice as he continues to say, "Would you care to tell me why that's your photo on those posters, then?" He gives him a very direct look, but keeps his casual posture. His hands in his pockets, hoping that he doesn't seem much of a threat to the other man. Given his (lack of) height and his slight build, he hopes that at least that much won't be too intimidating.