Hearing actual words from Megatronus helps things sink in more quickly, and gradually Orion's expression shifts from stunned to something Megatronus will likely find familiar. Orion has always had a way of managing to look happy and troubled simultaneously - he is obviously as enthusiastic to see the gladiator as the other way around, but he frowning all the same.

The relief is mostly in his optics.

"Megatronus," he says, starting to come forward himself. He suddenly feels really emotional and he's never been very good at dealing with that, which just makes him start feeling confused. "I am sorry, I..." He's trying to apologize for being weird, but he doesn't quite manage to finish his sentence.