Seth blinks in confusion before doing as Haizea asked him, kind of wrapping his arms around his face, good that had to look weird, taking a couple of steps back actually to be safe.

...Annnd then there's the sounds of glass shattering into a million pieces.
Seth can't help but drop his arms slightly to peek over them, and just staring kind of wide eyed for a moment. Did she just...? She did. Wow.

He doesn't quite lower his arms yet though, since Haizea hadn't told him to.