The Red Jinn, later known as Jinnicky, is one of Ruth Plumly Thompson's most frequently occurring characters in her Oz books. He was first introduced in Jack Pumpkinhead of Oz as a mysterious figure who educates Jack Pumpkinhead on the use of the Pirate Sack. Although a detailed description is included in the text, Jack Pumpkinhead of Oz includes no illustrations of the Red Jinn aside from a gruesome color plate that did not appear outside the first edition, in which he has massive piercings. He was reintroduced, drawn, and given the name Jinnicky in The Purple Prince of Oz; he also appeared in the follow-up, The Silver Princess in Oz. (He makes a cameo appearance in The Wishing Horse of Oz, and he is the principal pre-existing character in Thompson's sub-canonical penultimate Oz book, Yan