Talk:Original Character Guidelines/@comment-32518419-20200107185202/@comment-3991308-20200107185758

It depends on the situation. In short, they basically can't disrupt the canon of the universe. One way this manifests is that they can't take over the role itself.

It's generally accepted that the eldest sibling gets the role, with some exceptions. One of them is the "third child" exception. For instance, you could create older siblings or cousins for Rosabella, since her story requires her to have them. In this case, it makes sense why Rosabella would be the Beauty among her siblings, even though (in your universe) she might not be the oldest.

If they go to Ever After High, they should have a destiny. Going off the same example - a sister of Rosabella could attend. But if you made a younger sister for say, Maddie Hatter, there's no reason why she should be at EAH.

Several of us have OCs related to canon characters! It's a lot of fun, and is a great way of furthering your own exploration of the world.