Strong female lead

In a world where special powers awaken in individuals, a 4-year-old girl becomes an S-class hunter but has no parents. Assigned a quest to find guardians, he is eventually adopted by the nation’s top hunter. With a new skill that allows him to register caregivers and earn “devotion points” for growth, he sets out to gather the best guardians to grow stronger and thrive.

Bunny, a 4-year-old at an orphanage, is actually the secret heir to the Great Demon King.
When she is adopted by a ducal family, she remembers her nanny's advice: to find a human guardian. But there's a catch—it’s the Yudia Ducal Family, the demon world’s greatest rival, endowed with sacred powers!
Bunny thinks she's doomed, but armed with cuteness and a magical [Prophecy Notebook], she decides to win the family over and claim her throne