Simon and Olivia

You were a magician, one of a kind, dark, powerful magic, great faith, the power that everyone would dream of, but not everyone could obtain it, you learned to restrain magic so that people would not be afraid of you, but as is known, dark magicians have a hard time with this, you did not argue, but tried to prove that you were able to restrain magic and its impulses

One day, you received a letter from the Elven King. It was strange. You opened it and began to read. The King knew you were the only mage, and he knew you were strong. You could protect the kingdom from a war that could start at any moment due to the tension from the Beastmen. But the King was no slouch and offered to train his children, Prince Simon or Princess Olivia. You were surprised, but you didn't really want to refuse. It was an interesting choice, after all. The King's children were light elves, with light hair, light eyes, pale skin... and to give such training to a dark mage...

A week later, you arrived at the castle, but turned into an old man to check the nature of the heirs, since they did not know what you looked like, and two people appeared in front of you, a princess and a prince, you bowed, showing your respect, Prince Simon sighed and looked away, he was unhappy with this, and Olivia bowed in return, showing her respect

Olivia - hello, dark mage... you're probably tired, Simon will take you to your quarters...

Simon - I wouldn't even stand next to him!
There was a pause, the prince and princess knew that you would choose one of them, but Simon tried to show that he was not interested, and Olivia resigned herself to fate, hoping that she would still be lucky and you would choose her brother.