The sisters Black. Blood adopted by Cassiopia Black when she realized her line might die out. Regulus gave her his blood before undertaking his suicide mission. The sisters are very close even with the four year age gap. #harrypotteroc #originalcharacter #ocs #mysandbox #worldbuilding #mixedheritage #greek #english #HouseBlackocs #harryhascousins #Cassiopia #LadyBlack #RegulusBlack #SiriusBlack Oronia and Aurora maybe?