Celestia and Luna's parents, King Morningtide and Queen Umbra, were deeply in love since the first time they laid eyes on each other. They were the only two natural-born alicorns, and they bonded immediently. For centuries they ruled over the world as immortal beings. When the time came to think about children, they knew what had to be done. They gladly sacrificed their own lives to create their own immortal children. Tia and Luna were raised by Star Swirl, a long time friend of the couple, and he followed the letter left by them to the T. When the time came, he happily gifted them their wings