Naive is probably the word. He's had some hard times in his short lifespan and gone through a lot of bad experiences, dying three times, but he still looks at the world through untainted eyes despite reasons otherwise. He is doing a little better about not trusting everyone all the time. That was a key part of his education. He is glad they're on the same page about not fighting. He hates fighting people. He's never ended up with the bloodlust that Dean sometimes has, the need to be a hunter and kill the enemy.

He's never met anyone who doesn't know what an angel is, but this new friend seems to be from a different species himself. And they're in a different universe. His eyes widen a little.

"We're a species of creatures who were created to serve God." Jack himself was not born for that purpose, more the opposite, but he knows that's where the angels began and that some of them still believe in strongly. "We have a variety of supernatural powers because of how we were designed."