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This article contains plot details from the latest books.
Iggy is Sophie's pet Imp. She rescued him in Keeper of the Lost Cities when he was stuck in the mouth of a Verminion (pg. 206) as prey. At first, Grady protested to keeping Iggy because imps can be troublesome, as an imp destroyed his tree house when he was a kid, but he quickly gave in and let Sophie keep Iggy when he saw how much Sophie loved Iggy. Biana likes to keep Iggy at Everglen and likes to give him makeovers, turning his fur different colors. Iggy also has a relationship with Biana, who took care of the imp in Nightfall, as well as other times when Sophie was unable to.
Iggy originally had black wings, green eyes, and gray fur, when Sophie first found him.
In Exile, Dex gives Iggy an elixir, turning Iggy's fur pink and curly. Dex later turns Iggy's fur orange with dreadlocks during Everblaze, blue and soft in Neverseen, purple and puffy in Lodestar, green and silky in Nightfall, yellow and sparkly in Flashback, and will be ice blue with crimped fur in Legacy.
Iggy has the famous "Iggy Breath," which smells horrible due to his stinky diet. He likes to curl up with Sophie at night and play. One of his favorite places to be petted is his tummy. Iggy is described to have "chainsaw” or “leafblower” snoring, as explained by Sophie. In Flashback, Iggy unleashed many toxic farts on Sophie when she comes back to Havenfield after she is recovered.
During Book 1, Sophie learned to talk telepathically to Iggy and give him simple commands. Under Sophie's instruction, Iggy tried to help Sophie by biting the Neverseen agents who kidnapped her. Imp bites are venomous but not deadly, as Grady has stated.
- Iggy's "Purple Reign" is most likely a reference to Prince, with his famous song, "Purple Rain".
- Shannon Messenger had people vote on what they wanted Iggy to look like in the 7th book. Sparkles won by a landslide, while it was very close between red and yellow for the coloring.
- Shannon Messenger had fans vote on the color and style of Iggy in the 8th book. The choices were ice-blue and teal, and ice-blue won. Iggy is now going to be ice-blue with crimped fur.
- The pink dancing Iggy probably refers to Iggy Azalea.
- The elixir used to turn the stinky imp green was called Greenleaf.