Shana and Ciel Sorcière are half-sisters.
Lastly: in 2018, S.D. marries a man named Gilgamesh (no last name), and has a daughter, Arcueid van der Merwe. In 2015, Elektra marries a man, Alistair Zevran Courier, and has a daughter too, named Reverie Chyrissé van der Merwe.