Sekhat

So Umirra and Marida, the daughter of the khedive, were wed and soon produced triplets -- sons Amir and Bhamut; and daughter Sekhat. But Marida died in childbirth and in his grief, Umirra followed -- a victim of his own hand. So the khedive cast the infant brothers out of his presence and handed them to the rulers of dry land to raise them, saying, "These are children of the land." But the daughter he allowed to remain for she resembled her mother and the khedive could not bear to part with her.

The sister of Amir and Bhamut, Sekhat was "not of the land" and was heiress to the realm of her grandfather, a spirit of the sea. As adults her brothers returned to the place of their birth, and not recognizing Sekhat sought to make her their wife. In their dispute, Sekhat was slain, therefore the Khedive pronounced a curse upon the land and those who live on it. 

Among other devotees, Sekhat has a specific cult of women called the Akwali Sekhat which serve as a House of Assassins.