I have so many royal ocs, but there are specifically 2 royals of note:
Emilia Ricoletti- a princess from an alternate Earth who dreams of traveling the stars. She takes astronomy lessons every night from a mysterious person in the castle known only as "The Astronomer" who turns out to be a friendly alien trying to get home.
And
Lorenzo- the first royal in his society to be born without powers, which means he will be sacrificed to the gods. He learns of his fate and runs away, with the royal family casting a spell to summon a horde of powerful entities sent to hunt him down and kill him. Lorenzo makes his way to a little village on the outskirts of the kingdom where he meets Sherri, his first and only friend. They live together for a while until the creatures hunting Lorenzo catch up one day and kill him. This turns out not to be the end, however, as after death, Lorenzo I visited by the god that created their universe and is told that he is wanted to become the new deity of life. He is then resurrected with the powers of a god of life.