Age: On view 20 years
Place of origin: Pandaemonium
Personality traits: Cunning, charismatic, thoughtful
Aion is the antagonist of the anime/manga series, a Sinner and a demon, and also Chrono's twin older brother. He is after all of the Apostles, including Azmaria, for reasons that are unknown until Chrono reveals them. In the manga, his goal is to rebuild the world out of the "system" that binds everyone to their respective roles.
Aion is very intelligent and manipulative while still remaining charismatic to those around him. Throughout the manga, his goals remain ambiguous until the last volume. Although he is the antagonist of the series, he can not easily be classified as 'bad' although his views and methods are highly controversial. He is fighting the system 'Pandemonium' that maintains the roles that each of his siblings much take. If they were to ever reach a higher domain like himself, they will have learnt too much and are disposed of.
Voiced by: Kazuhiko Inoue (Japanese), Andy McAvin (English)