Aziraphale smiles at Peninnah reassuringly, leaning forward a bit to hopefully catch her gaze. "It is perfectly reasonable to be cautious. I was much the same way when I first spoke with him, and I'm sure that I handled it with far less grace than you did. But I can say with confidence that Lucifer's kindness is genuine. He is certainly not immune to pride, but he won't abuse your goodwill or otherwise betray you."

There is a pause before the angel adds ruefully, "He does like to tease, but it's all meant in fun, and I suspect that I get the brunt of it because he sees me like a little brother."