| Description | Character |
| A warlike demon who traveled in time and brought home a book called 'Lady Heatherington Smythe's Hedgerow' | |
| A bodyguard who works for Jon Spiro. This character shoots Butler. | |
| A psychopathic lieutenant who plans to kill Julius Root. | |
| A fish-smuggling pixie who almost kills Holly Short with a multimixer. | |
| A technically savvy pixie whose inventions make Foaly jealous. | |
| As a kid he believed that his brother was killed by demons. His real name is Jonah Lee. | |
| The leader of the Exctintionists. | |
| A Chicago hit-man who was hired by Jon Spiro to capture Artemis Fowl. | |
| A 12 year old genius who develops feelings for Artemis. | |
| The elder brother of Julius Root | |
| A goblin who is a commanding officer in the B'wa Kell, and mesmerized by Opal Koboi. | |
| A shady Chicago buisnessman who steals the C Cube from Artemis Fowl | |