User blog comment:SailorSedna052/Need a subtle vote./@comment-18086040-20171021234444/@comment-18086040-20171022150437

You know... a few years ago, I thought of a similar plot. I can give you my idea.

So instead of "Ben's twin sister", just make it "Older half-sister". I think that for a better story (and more drama, sure), this character of yours should've been 20 years old now. Her mother isn't Belle, but another woman (because I cannot see Belle giving up a baby because of her appearance. That very fact is already silly and nowhere near the character Belle). Beast kinda had an outside adventure, and as punishment, the Enchantress cursed this baby. To cover his crimes, Beast sent this baby to the Isle of the Lost, where she grew up and yada yada.

I hope you like this plot. It is all yours.