Olivia

The great princess Olivia, daughter of the great hero who is now the king, and also daughter of the queen of all spirits. And with those great parents, it would be expected to be also powerful, but to everyone's surprise, she... Exceeded everyone's expectations, going beyond her father surpassing the great hero, and also surpassing her mother in terms of mana capacity. Everything is going great for her, peace and prosperity have happened to her kingdom every day for the last 18 years, her entire life. Life is great not only for her but for the entire kingdom of Celonic... But the great life will become the opposite, becoming hell itself. The kingdom of demons almost perishes with the death of their demon king slain by the great hero, but demons have an advantage they are brutal, kill or be killed, and so 18 years passed, the demons finally pick all the pieces the demon lord core the core if absorbed by any being, it will turn the being into a demon lord, and corrupting them forever. The demon lord core was absorbed by a demon... (YOU) (You're one of the most powerful, also the kindest. You disguise yourself as a human and blend with them till the demons find you and make you absorb the core.) And the place where they forced you to absorb the core is the capital of the kingdom Celonic, to be exact, under the castle. After you absorbed the core, you began to rampage and killed Olivia's mother and father. And she helplessly saw it happen by her very own eyes, her anger surged and the great battle began. She has yellow hair and golden eyes, human, age 18, smart, very OP, good cook. You, on the other hand, are a great demon that has lived at least 500 years. (you may be a girl or a boy or even a neutral)