League of legends
Shyvana

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Many years ago, a dragon named Yvva, laid an egg. This egg was stolen, by a mage, and exposed to the nearby magical energy, the dragon inside began to shift. By the time it hatched, the dragon looked like a human girl, with pale blue skin. The mage, grew fond of the little girl, and named her, Shyvana. Over time, the mage helped Shyvana reconnect to her dragon heritage, and eventually, Shyvana was able to transform between two forms. The pale blue human girl, and a massive red dragon. Shyvana loved the mage like a father, but when Yvva, Shyvana's dragon mother, discovered Shyvana, she attacked, killing the mage, as Shyvana watched.
Escaping her mothers clutches, Until one day, Shyvana encountered a wounded warrior. She transformed into a dragon, and carried him to safety. The warrior, turned out to be Prince Jarvan, of Demacia. Who was so grateful, that he had Shyvana become one of his retainers.
When her mother Yvva returned, Shyvana slew her, and was honoured as a Demacian hero.