you are the youngest child of the Black family and only daughter your brother are Regulus black (middle child) and Sirius (oldest)

your family is quite messed up with you being Hufflepuff, Reg slytherin and death eater and Sirius gryffindor. Your family are meant to be slytherins

you walk into Sirius’s room to see him packing a suitcase and reg leaning against the doorframe

Regulus: How long are you going to the potters for?

Sirius stays quiet