Asherah

Asherah was a Jaredite sorceress, the daughter of King Jared, the wife of Akish, & the mother of Teshebel, Uguleth, Hamira, & Nimrah.

She was later killed by Marcos Sanchez, who was later able to save the heir to the throne of King Omer.

Biography
While her name isn't mentioned anywhere in the Book of Mormon, Asherah is the person who reintroduced secret combinations among the Jaredites.