Relius Clover (レリウス=クローバー), known to many as the Mad Puppeteer (狂気の人形師), is the patriarch of the Clover family and the former Colonel of the Novus Orbis Librarium's Engineering Department. He was once the leader of the Ten Sages, known as The One (ザ・ワン) and formerly belonged to the Immortal Breakers, having worked alongside Valkenhayn R. Hellsing. He wants to destroy the world and rebuild it as its architect.