Dark Magus

During the Sirius Black news that he had escape thanks to Harry Potter and Hermione Granger. He stumbled upon a family member who is his kin and blood. He decided to abdicate his right as Lord of 12 Grimmauld Place to declared her as the new Lady from House of Black. She will assist the Order of Phoenix to defeated the Death eaters, but there is a problem. She can talk to snakes.