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This article contains plot details from the latest books.
Gethen is the Neverseen's Telepath. The Black Swan captured him during the battle on Mount Everest, although he was traded away to the Council later on. He was the jogger with a dog that tried to capture Sophie when she was living with her human family. He has blond hair, piercing blue eyes, and a crescent-moon bite on his hand from the dog that he was jogging with when he tried to kidnap Sophie in the first book. It was also mentioned that his nose is now permanently crooked. Gethen was held in captivity by the Black Swan. He had his fingernails frozen off by Squall to prevent the Neverseen from tracking his location, even though it was unnecessary because he was supposed to stay trapped in Lumenaria for his part of the timeline. To prevent his mind being broken, he found a way to tuck away his consciousness. When Sophie tried to probe his mind, it felt empty, like there was nothing there. He is also very good at blocking.
He was moved to the dungeons in Lumenaria during Lodestar, but later escaped with the Neverseen when he destroyed the castle. Through the months he was in the dungeons, Gethen accumulated enough mental power to bring down a huge structure using outward channeling. He stabbed Mr. Forkle when aiming for Oralie before his escape and managed to kill Mr. Forkle from blood loss.