Sisterly love

Sylvanas Windrunner is now known as a leader of the forsaken who have taken respite under the wings of the horde but before hand she was a ranger general of Quel'thalas, one of the strongest warriors the high elves had. Her people trusted and knew her for her strength and loyalty, along with her quick thinking and leadership. In addition to that, she also had two sisters. Both of them sharing the same traits and talents, maybe with not such a conviction as Sylvanas did but all were a force on their own.

They shared a bond that grew stronger throughout their lives until it grew into something... different. A sisterly love that is far strong than between any other siblings on Azeroth.