[He's fine with the shift in topic. While he no longer tries to bury the reality of Marco's death - when he can see his friend every day, living and breathing - like some secret he pretends not to know, that doesn't mean he wants to fling it around in open conversation.

And a strange question is normal in a strange place. He knows why Armin needs to ask.]

I was with you, actually. We were summoned to testify about what happened in Stohess-- [He doesn't use Annie's name, or the words Female Titan.] --but when we got there, we were turned away.