Posy Stickle was a young female hedgehog who was the sister of Ferdy, Coggs and Spike. Her parents were Ben and Goody Stickle. Posy and her brother Spike were very fond of Riverwyte, who played with them and whom they called "Uncle Mask". They never knew he had been killed by Tsarmina Greeneyes because the otter's dying wish was that they be told he simply moved away. Posy and Spike occasionally masqueraded as Ferdy and Coggs in order to fool Tsarmina.