"The Agent" (代（だい）行（こう）者（しゃ） Daikōsha) is an archetype of LIGHT and DARK Fairy monsters. They were introduced in Ancient Sanctuary, and were reprinted in Dark Revelation Volume 2. They made a return in the Lost Sanctuary Structure Deck/Structure Deck: Lost Sanctuary. After many years of inactivity, Duelist Alliance revitalized the archetype once again with the introduction of the only DARK "The Agent". The archetype is related to the Field Spell Card "The Sanctuary in the Sky". They are all named "The Agent of - ".