Two more adopts that enter the scene as a pair: Suuz and Beella
Although not technically sisters they sure act like it and do everything together. They always seem cold and heartless even through the silly endeavors they take on. But you can tell that both of them are suffering when they don't get to see each other.
They may be partners but mostly in crime. Neither particularly afraid of the bedroom but preferably with another sister joining them. That's not to say they don't like to play with any subject that shows up.