Talk:Princess Celestia/@comment-3410511-20140622183040/@comment-24908786-20140623000907

The Journal does not mention much about Celestia and Luna before Star Swirl asked them to become Princesses, but it did say that Alicorns age differently from other ponies, so they were Alicorns by birthright, making them pure-blooded Alicorns, and Star Swirl believed they were just the ponies needed to help unite the three tribes into peace and harmony.

Also, I think they did live alone before Star Swirl approached them with his offer. Once accepted, they then had the Castle of the Royal Sisters built so they could live close to everypony else as their new sovereigns.

I think it is still fan fiction right now about the whereabouts of Celestia and Luna's birth parents, and if they did have birth parents. I doubt the Royal Sisters were the only, pure-blooded Alicorns in Equestria at the time of Star Swirl's offer. There must have been more of them sometime before the events of Hearth's Warming Eve's origin story.

As for Cadance and Twilight, they became Alicorns due to performing a feat worthy enough of granting them their new Alicorn status and Princess-hood. Who knows if any other ponies in the past were able to do something similar to become Alicorns as well...