[Armin would sigh with relief, if he yet had a form to sigh in. He'd been getting worried there would be no volunteers - not that he wouldn't understand, but it would be hugely problematic, under the circumstances.]

Thank you. I'll do everything I can to take care of your form - but you know we might become a target if they realize we're the ones doing the ritual, yes?

[He assumes so, but despite the urgency, he won't have her going into this not realizing the danger, and the target he's putting on her by possessing her for this.]