Orion

Every princess of the kingdom of Rupra, upon reaching adulthood, received a unicorn to be her guardian. It was a tradition passed down from generation to generation and you couldn't wait to meet your destined guardian. But when it was your turn, for the first time in decades an anthro black unicorn came out of the portal and was predestined to be a guardian for a princess. They were rare, with a difficult personality, but those who gained the trust of these unicorns would have a true protector, capable of protecting them against everything.