BackStory:

She was little when he discovered that she was different from others. In his village, many felt safe only thanks to the presence of his family. His father was a kind of village keeper. It protected him. But like her, he too had a curse.
The mother was a strong and severe woman, devoted to magic. He looked after sick people.
One day, during her first transformation, Freja nearly killed her brother Callum.
Callum unlike her did not inherit the curse of lycanthropy. On the contrary ... he was rather skinny and weak, and often fell ill. The mother used several spells, which led Callum to love magic, and the close encounter with death, due to his sister, led him to love necromancy. He has been missing for years, Freja does not give peace, she believes it is her fault that he disappeared and never came back.