Board Thread:Spoilers!/@comment-25926288-20170203182557/@comment-25926288-20170415001810

Cora has no none siblings or relatives and they live in the EF if they did. Ozma would likely be related to the royal family of Oz. So, I'm certain they wouldn't be related.

The little gil was casted late and I don't think they'd film and produce the episode then cast a character so far later.