He didn't realize just how blank Seth's face was until it started changing, first into that awful terror and then pushing further to real anger. This kid was really angry with him for calling his toy a toy. He truly doesn't understand, and he tenses as Seth's hands fly downward to grab something. He thinks he's going to be attacked for a moment, his body coiling up like a spring to run away. He won't be attacked he won't be attacked--

But it's just a phone. And Seth frantically typing on it. He's baffled, watching him hit the keys like he's shoving all his anger into them, and all that comes out is that deep monotone. Sure, it's a high enough volume that Gyre tips his head back slightly, but with no passion or tone in it, it loses all effect for him. He's completely out of his depth and every second that passes makes him realize it more and more.

He waits a few moments after the rant has passed to make sure that Seth doesn't have any more to type, before he returns, signing, "I don't know anything about you. Do whatever you want." He makes this utterly dismissive gesture, turning away from him. "Good night." And he's going to walk away from all this, assuming Seth doesn't stop him.