Firo smiles again, partly because Maiza isn't annoyed (of course he's not; it's Maiza) and partly with because it's just nice to see him happy and laughing. He has to admit, he had been worried about it being a potentially sore subject.

He leans forward, unable to hide his interest. "Alchemists? So that's how you met the others?" This is a point where he probably could dig into Szilard's memories and get an answer--they're clearer than the others--but he doesn't. It'll be more pleasant hearing it from Maiza.