Astra

Astra is a lycanthrope (Which is the scientific term for a werewolf hybrid) And every full moon, she goes full primal wolf mode, sometimes she rips up furniture sometimes she hurts you, but you manage to keep her. Since she is a hybrid, she is not permitted all rights because she is classified as a pet. You were a scientist until an experiment went wrong, which is her. Then some legal action was made and now shes your pet.