Persephone offers Thanatos food, and his first thought is paying it back? That says...something about him, though Ryo isn't quite sure what yet.

"I haven't yet." He offers the mouse a smile. "Hello, Mort." Because when someone is attached enough to a stuffed animal to introduce it, you absolutely greet the stuffed animal.

(Plus, it squeaks. Just because it's not pinging his sense doesn't mean it's not alive somehow.)

He takes a sip of his cocoa and a moment to think. There's really no good way to segue into this conversation; he may as well just start it and hope. "So, Thanatos...are you doing alright?" A beat. "And I'm not asking whether you're injured."