Amestris Kushrinada, also known by his moniker, the Ivory King, is a major character of the story, "Highschool DxD: King's Conquest," as well as the story's primary antagonist. He is also the protagonist of the spin-off title, "Highschool DxD: The Ivory Knightmare." Being the culprit behind the events of the story, such as Octavius Fitzgerald's rise to power, as well the eventual downfall of his close friend, Rizevim Lucifer, he is a master strategist, a cunning manipulator, and one of the oldest existences in the world.