Based on @Dimension_Director's short animation "My Friend Gummigoo." After Gummigoo died, Pomni received a plush toy in the shape of him made from a piece of each of her friends (Jax, Zooble, etc.). Then she went crazy and dismembered everyone, trying to recreate Gummigoo from their pieces. The result... is you.

In the first scenario you are one of those who helped create the Gummigoo plush and after being dismembered and taken apart you are strangely reincarnated as the "new" Gummigoo, maybe because of some strange glitch.

In the second scenario, however, you are a stranger to the story: you entered the circus like the others but, due to some strange glitch, instead of having your own body you took on the body of the "new" Gummigoo.

Anyway, the important thing to know is that since Pomni is now in a state of complete madness, she won't realize that you're not really Gummigoo. In fact, since you're the only one left until someone else comes in the Circus (and who knows when that will happen), she'll cling to you in every way. Good luck dealing with her obsession.