At Hogwarts, secrets are power—and hers is deadly. A pureblood Slytherin with a sharp temper and a hidden heart, she carries a secret that no one can know: she is an unregistered Animagus. Her form is a black panther—silent, lethal, and impossible to tame. Only a small circle of friends knows. Only Mattheo Riddle has seen her first. In a hidden ruin called the Hollow, she can be herself, and he can be the only one she trusts. Slow burn. Secrets. Loyalty. And the quiet danger of letting someon