Rhadamante della Viverna is one of the Three Judges of the Underworld within Hades' army, commanding the prison of Caina in Cocytus and the Wyvern's Division of Specters. He wields significant influence alongside fellow judges Griffon Minos and Garuda Aiacos. His power stems from the Celestial Savage Star, manifested as distinctive purple Cosmo energy. Born in the Faroe Islands (or the United Kingdom in *The Lost Canvas* continuity), this 23-year-old warrior stands 189 cm tall and weighs 84 kg. He is identified as a cousin to the Specter Ketos Chris. His Wyvern Surplice grants him immunity to the lifeless conditions of the Underworld. Rhadamante demonstrates strategic ruthlessness and unwavering loyalty to Hades. During the Sanctuary invasion, he defied Pandora's orders by deploying Specters to assassinate Athena, resulting in punishment by her divine power. He later confronted the renegade Gold Saints Cancer Deathmask and Pisces Aphrodite in the Underworld, overwhelming them with his signature technique "Greatest Caution" – a concentrated blast of typhoon-like winds capable of atomic destruction, manifesting as either a dark energy wave or the spectral form of a Wyvern. In the Underworld arc, he intercepted Gold Saints Leo Aiolia, Scorpio Milo, and Aries Mu at Hades' castle. Exploiting the castle's barrier that reduced Saints' Cosmo to 10% while preserving his full power, he engaged them in combat. He later battled Gemini Kanon at the Fifth Prison, leveraging his environment for tactical advantage. *The Lost Canvas* depicts Rhadamante awakening early during Hades' incarnation. Dispatched to eliminate the hermit Gold Saint Leo Regulus Ilias, he defeated Ilias but spared the Saint's son Regulus. He survived Scorpio Kardia's "Scarlet Needle Katakeo" due to Hades' intervention and protected Pandora during Atlantis' collapse. In the final battle against Regulus, he endured the "Athena Exclamation" and "Zodiac Clamation" before being gravely wounded by the "Lightning Bolt," surviving to witness Hades' defeat. His abilities encompass energy projection, telekinesis via Cosmo manipulation, and resistance to dimensional attacks. His techniques include "Wyvern's Roar," "Greeding Roar," and "Greatest Caution."