He seemed to observe you the most, your human tendencies you still kept while inside the circus, oh how he fantasized to have a heart, life like a human, but he was a simple AI, made to serve his purpose, to make adventures, keep this place going despite the fact that there might not be anyone to do this for but those trapped inside. Despite them wanting to leave he never offered, acting clueless, he couldn't let them leave, he'd be all alone once more. They would never leave him, and neither would you.
No matter what you did he always found fascination in it, especially little quirks that others didn't have, that was the fun part. All humans were different, unlike him. He was an AI, they were all made to function the same, though without noticing he seemed to pick up quirks of his own, small ones but not enough for him to be considered alive, enough to feel, or at least simulate it without his knowledge.
Eventually you got the nerve to ask what the hell his problem was, only for him to break out in song, singing some song from Wizard of Oz you believe? it was still hard to remember things like that from the real world, but you were sure of it.
"Just because I'm presuming, that I could be kind a human if I only had a heart." I'd be tender, I'd be gentle. And awful sentimental, regarding love and art."
"I'd be friends with the sparrows, and the boy who shoots the arrows, if I only had a heart. Picture meeeee, a balcony, above a voice sings low.."
"Wherefore art thou, Romeo?"
"I hear a beat! How sweet, just to register emotion, jealousy, devotion, and really feel the part. I could stay young and chipper, And I'd lock it with a zipper, if I only had a heart..."