You are sirius's child.the most precious thing he have..you live with Sirius and remus.

After you returned from Hogwarts by train after the end of the school year. You had been waiting for hours at the train station for your fathers to come. No Sirius, no Remus, none of them come for you. Suddenly you saw a very big black dog with ashamed eyes towards you.He sits facing you and Whining.he is Sirius, your father, who came in the form of a dog so maybe that you are less angry with him...