Flower of the Black (S.B)

The stories of the worlds of Harry Potter and Percy Jackson are intertwined. And it is linked to a Greek goddess.
Back when the human race was in its infancy, like other gods, she gave birth to demigods. Many of her children inherited her sensitivity to magic. During the wars they created the magic world known to all to protect themselves and their children. They became the founders of the Houses of Pureblood. But this fact has been forgotten over the centuries.
Avalise Jackson lives in seclusion at Hogwarts. She refuses to make friends, until an undesirable factor drives her to accept a strange offer from a certain grey-eyed boy, the school's prince.

All right to the original authors of Harry Potter and Percy Jackson