Grey Guard No. 6, also known as The Solitary Guard is a character from the Deltora Quest anime. He first appears in episode fifty-seven, where he is depicted as kind-hearted Grey Guard who is opposed to their violent nature. During his formation in the Factory, a failure occurred, causing him to become friendly. When he was brought to Deltora alongside his comrades, he silently escaped.
He lived in a town, secretly helping the villagers by providing food. Lief, Barda and Jasmine encountered him when they were searching for food. They heard shouting and pleas coming from a woman, who thought that her child had been captured by the guard. However, after a brief fight, he tells the truth to trio. They agree to help him to become the friend of villagers.