Olianne Sihn was a female Dathomiri witch and the war-leader of the Raining Leaves Clan, a traditionalist and matriarchal Dathomiri Witch clan led by her sister, Kaminne Sihn. In 33.5 ABY, an uprising of the male slaves within the Raining Leaves Clan resulted in a massacre; the immediate aftermath was the loss of two-thirds of the clan, among them all its males over the age of ten, as well as the clan's leaders. Olianne and Sihn lost their entire family to the massacre, which consisted of their father, mother and oldest sister.