Zarkon is a fictional character from the animated television series Voltron: Legendary Defender. He serves as the primary antagonist and is the leader of the Galra Empire, a militaristic organization that seeks to conquer the universe. Zarkon is known for his immense power and ruthless tactics, often using his abilities to instill fear in his enemies. In the series, Zarkon is depicted as a former paladin of Voltron, who was once a hero but became corrupted by power. His character is central to the conflict between the Paladins of Voltron and the Galra Empire, driving the narrative of the show as the heroes strive to defeat him and restore peace.