"Thank you, Thrall, I'm okay. We wouldn't have made it without the help of THIS CHAMPION." They could do this better.
Just address the player more casually.
"Thank you, Thrall, I'm okay. We wouldn't have made it without our friend, here."
Address the player directly, then address the named NPCs.
"Thank you. We wouldn't have made it without you. Thrall, I'm okay."
Make a joke of it now and then.
"Thank you, Thrall, I'm okay. I owe it all to... uh... what was your name again?"
These aren't great, but things like them would at least break the monotony of CHAMPION champion ChAmPiOn!