Agares

Agares (アガレス, Agaresu) is Kouen Ren's Djinn. Agares was in 2nd Dungeon, Agares.

History
Agares used to live in Alma Toran. Agares, along with the rest of the Djinn, were created by King Solomon from Rukh.

Magnostadt Arc
Aladdin demands Kouen Ren to send back his soldiers, but since he doesn't seem to believe him, he summons Kouen's three Djinn. Agares comes along with Astaroth and Phenex, and, as the other two, says to Aladdin, We are here to serve you, our "King" and the reincarnation of our past "Great King".

Immediately afterwards, Aladdin also summons Amon and Leraje, and all the Djinn ask Aladdin if he called them. Amon explains the situation while the other Djinn listen. When Kouen grabs the Magi and orders him, with a scary expression, to tell him everything, Agares, as well as Phenex and Astaroth, begs his King to stop being so rude towards the Magi though he doesn't change his expression. Aladdin accepts telling everything to Kouen if he helps to destroy the Medium, and all the Djinn are incredulous by that, though Agares doesn't show much on his face. While all the Dungeon Capturers Equips, the Djinn say that they leave everything to them, their King Vessels.

Dungeon Capturer
Agares' Dungeon Capturer is Kouen Ren.

Household Member
The only known member of Agares' Household is Kokuton Shuu.

Trivia

 * Agares's appearance can greatly be changed, as he can take on a more feral appearance.
 * His name "Agares" is probably taken from the book The Lesser Key of Solomon. In the first section of this book, entitled Ars Goetia, several demons are described, Agares being the second. The dungeon where Agares resided in was the 2nd as well.