Imperator Ix (ノウェム Nowemu), also known as Pir'Oth Ix or simply Ix, is the main antagonist of Sonic Chronicles: The Dark Brotherhood. He is an echidna and the leader of the Nocturnus Clan. A megalomaniac with a knack for techno-wizardry and Machiavellian politics, Ix orchestrated the theft of all seven Chaos Emeralds and the Master Emerald in a scheme to break the Nocturnus Clan out of the Twilight Cage and conquer Sonic's world.