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Briar Cudgeon was a psychopathic elf and a supporting character early in the Artemis Fowl series, serving as one of the main antagonists in Artemis Fowl and the secondary antagonist of The Arctic Incident. He proclaimed himself Commander of the LEP before his downfall.
In the film he is the secondary antagonist and is played by Joshua McGuire.
Briar Cudgeon's background is not offered in any of the books, but in Artemis Fowl, he is a power-hungry lieutenant in LEPrecon and is jealous of Commander Root's position. It also says that he used to be Commander Root's roommate.
At first he just gives the impression of being a pompous but essentially harmless individual however his true sinister nature soon emerges. He is Retrieval One's leader, then becomes Acting Commander.
After an attempt to exploit the situation and seize power, his plan is thwarted and in a rage he assaults Foaly. Root incapacitates him with a tranquilizer dart that reacts with some mind accelerating drugs Cudgeon had been experimenting with, resulting in him becoming deformed. He is demoted to the rank of private and left consumed with a desire for vengeance. He joins forces with Opal Koboi and, together, they began a plan to take over The Lower Elements by supplying the B'wa Kell with weapons.
However, he plans to kill the goblins, as well as his partner, when they are of no further use. In a complex turn of events, Briar's schemes are revealed to Koboi by Artemis Fowl and Foaly. Koboi flies into a rage and assaults Cudgeon who, in the ensuing struggle, is thrown into the plasma supply for the DNA cannons at Koboi Labs and killed. Ironically, it was he who activated the plasma cannons.
Briar Cudgeon was Court Marshalled and imprisoned for an unknown offense. However, Opal Koboi managed to get him released and reinstated into the LEP in order to be her agent. She threatened to kill him if he didn't help her. Briar Cudgeon rejoined the LEP and was adamantly opposed to Commander Root's authority. When Holly Short was kidnapped by Artemis Fowl, he didn't care, calling her the daughter of a traitor. Cudgeon joined the LEP above ground for the siege of Fowl Manor. When the Time Stop was failing and Artemis retrieved the Aculos, Opal ordered him to send in the Troll. Cudgeon got the backing of the Council and took over as Commander. He sent in the Troll, not caring if people or fairies were killed. Root and other officers wanted them to allow magic in the Manor to help Holly, but he forbade it. However, a Captain of the LEP disobeyed him and restored Holly's magic anyway. Commander Root got her position back. What became of Cudgeon is unknown.