[Imagining Armin needing to go through the Floor to revive isn't a pleasant thought, but at least he'd come to life that way. If he wouldn't and would just be a mind in their thoughts from now on...

No, the Arcana wouldn't leave him like that, right? They'd find a way to resurrect him somehow... right?]

He has to come back. There has to be a way... the floor, a dungeon. Something. I bet Armin hasn't given up either and that's why... that's how he's holding on.

I won't accept the thought that he might not be coming back.