I don't see why Eloise's home can't be the pro-fun hoedown universe: the other characters have to go back to their own stories, but she's the privileged one -- she gets to stay there... in the meta-fiction, as it were...

I'm not sure we're quite sure what the Hoedown universe is, anyway. Although one[?] thing I suspect it isn't is serious, internally consistent, and well-thought-out...!

I'm certainly not one to preach -- I usually end up inventing characters based on stereotypes and doing the research to work out what type of background could plausibly fit in only afterwards -- but I feel that one can over-intellectualise and take the fun out of things by trying to codify them too much away from their slapdash origins. What little we know about Eloise, her trollish relatives, and Florestan and the Sweetheart has emerged more or less organically in the margins of other stories; we may find out more about her in the future (maybe in a flashback?) But I feel that sitting down cudgelling your brains in a conscious attempt to produce a cut-and-dried alternative origins story runs the risk of producing rather forced results...