As the second highest-ranking clan of the 72 Pillars, the Agares Clan is tasked with being the moderator between the Bael Clan, the Four Great Satans, and the remaining Noble Devil Clans. The floating city called Agreas, where the crystals used to create evil pieces can be found, is a territory of Agares. Since ancient times, the First Head was known as the Devil "To make Deserters Return" and wizards of different factions summon the devils of Agares from time to time thinking this is still true.
Members of the Agares Clan possess the unique trait to control time to some degree. They also have the property to "recover fugitives".
The only known members of the Agares clan are the First Head, Lord Agares, Lady Agares and Seekvaira Agares.
- In demonology, Agares is a demon described in demonological grimoires such as the Livre des Esperitz (as Agarat), the Pseudomonarchia Daemonum, the Lesser Key of Solomon, and the Dictionnaire Infernal as a duke "under the powers of the east," an "old man, riding upon a crocodile, and carrying a hawk on his fist," who teaches languages, stops and retrieves runaway persons, causes earthquakes and grants noble titles.
- In Episode 14 (Season 1, OVA), Unas, a Magician from Ancient Egypt, mentions that he summoned another female Devil from the Agares Clan to be his bride. However, she rejected him, cursed him to be a mummy, and sealed him in a sarcophagus for centuries.