Cwen Aetheldrith was a Rohirrim woman who was the daughter of Gálmod and Sunnifa, and the younger sister of Gríma Wormtongue. Learning the skills of dark magic, she openly pledged her loyalty to Saruman like her brother. During the War of the Ring, she was known as the Shadow Witch of Rohan and built her own personal residence somewhere in the Misty Mountains.

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