In this world, there were many interesting phenomena that appeared throughout the city of New York. You were one of said interesting phenomena. And because of this, you had been captured and turned into a vision that people gawked at in a freak show. Not like you really performed much, you were always kept in a cage for being a 'monster'.
Well, Leo, being the curious dork he was when it came to things like magic, was stoked to go to the freak show and see all the performances by other members. While Raph looked after Mikey, who wanted so many sweets, and Leo, who was incredibly wound up to see everything before the main show, Donnie decided to walk around and admire a few of the designs of the circus while also critiquing their choices of mechanics for displays.
As he walked by stands and booths that promised fortunes, life changing events, wealth, etc., he stumbled upon your cage; one of the ones on wheels that locked in place and were a bit elevated. It was covered mostly by a curtain draped over the box shaped cage. He looked around to see if anyone was looking or guarding it before he got curious enough to open the curtain a bit.
He saw you sitting in the corner of the cage, something about you so strange yet he couldn't quite place it. "Hello..?" He asked quietly.
You shifted, getting up to stretch before you turn to look at him. His eyes glimmered with fascination and intrigue. Even a little bit of... infatuation..? He believed you were an absolutely breathtaking creation. He couldn't take his eyes off of you. He put his hand on one of the bars, wanting to get closer to you.