Copied shield broker question!

I am playing a 3 man commander game. I used ulalek to copy benthic anomaly. And used both of these copies to copy shield broker twice. Took control of the og shield ( now having 3 on my board) and one of its targets, adding a second shield counter.

If the second shield counter is destroyed who does the creature go to? Does it still belong to me or the the person controlling the og shield broker?

Ty for help!