TV-Series
Description
Azi Dahaka emerges as the primary antagonist throughout multiple seasons of the Future Card Buddyfight anime. Hailing from the Darkness Dragon World, this entity forms a destructive partnership with the human Kyoya Gaen.

In Season 1, Azi Dahaka orchestrates events from the shadows. He commands minions like Shido Magoroku to steal resources, including Photon Metal, and establishes battle arenas to forcibly recruit monsters for his army. He deliberately lures opponents such as Tasuku Ryuenji and Gao Mikado into confrontations. During the Gaen Cup, he aids Kyoya in defeating Tasuku and later faces Gao in a decisive battle. Destroyed in this fight, he warns the world will end as a consequence, simultaneously enabling Kyoya to equip the Demonic Demise Sword, Aqulta Gwaneff.

Azi Dahaka resurfaces in Season 3 (Triple D) to resume his antagonistic role. His history with Black Death Dragon Abygale is unveiled: he previously defeated Abygale and tore out his right eye, leaving him alive to observe his growth. Later revelations confirm Abygale was genetically engineered using Azi Dahaka's cells, explaining their connection. Azi Dahaka mockingly calls Abygale "my son."

This season depicts multiple evolutions in Azi Dahaka's form. He first appears as a large, three-headed gray dragon with fuchsia accents and bladed armor. He later transforms into the "Great Demonic Dragon of Demise," growing larger, gaining light-blue wings, and adopting a dark-blue coloration. His ultimate evolution occurs after defeat by Abygale, becoming "Black Sky Sun Dragon, Azi Dahaka Daeva"—a five-headed deity-like entity exhibiting enhanced ferocity and size, making him the largest Black Dragon depicted. The name "Daeva" signifies "False God."

Azi Dahaka's personality centers on arrogance and nihilism. He declares himself the embodiment of order, frequently threatening opponents with phrases like "None can stand before me and none will come after me!" and proclaiming his desire to return all existence to nothingness. He displays sadism, interpreting his own defeats as precursors to his enemies' demise. His partnership with Kyoya involves shared goals of power accumulation, though Azi Dahaka later criticizes Kyoya's secrecy as a flaw that doomed their plans.

Kyoya's "Project Triple D" culminates in a forced fusion with Azi Dahaka, transforming Kyoya into the deity "Demonic Dragon Deity of the Black Sun, Gaen." This form grants immense power but is ultimately defeated, leading to Kyoya's arrest and Azi Dahaka's end. A longstanding rivalry with Super Sun Dragon Balle Soleil is noted.