[ iris is transfixed by the magic clearly happening in front of him, having seen none other like it before. when she asks him about precautions, it takes him a moment to even remember what they're doing here, but when it does, his expression shifts into something regretful. ]

I'm not sure. But there probably are, yeah.

[ he's not too eager to explain what the collar is for, worried it might make his new teammates regard him with the same kind of distrust, so he just waves his hands vaguely in the air. ]

I don't think these things were made to be taken off unless the ones who put it on wanted to take them off.