Grim | Harry Potter

The Black twins were born into a legacy of shadows - whispers of betrayal, blood-stained names, and a family torn apart before they could even speak.
Raised by Remus Lupin after their father, Sirius Black, was cast into Azkaban, Cressida and Zenith Black have only ever had each other. Cressida, a sharp-witted Slytherin, carries the pure-blood name with pride, while Zenith, a fiercely loyal Gryffindor, would burn the world down to keep his sister safe.
But fate is not kind to the children of the Grim.
When Sirius Black escapes Azkaban, old ghosts stir, and the fragile balance of their world begins to shift. Some wounds ache for healing, others form. As the past bleeds into the present, Zenith will do anything to protect his sister. Even if that means stepping into the darkness he's trying to escape.
Because in the end, it's not the cunning snake that must be feared. It's the lion with nothing left to lose.