Agares is one of the Praetorian Guard, a highly trained elite demonic task force. His Guard name is 'Iron-Horn Agares' due to the spherical ends of his horns, which are made of iron. Agares was the only Praetorian Guard member to resist entering the service of the current Varahkhan, the lord of demons. He waged a guerilla war against the lord's forces with the intent of keeping his holdings free from the demon king's control and performed remarkably well, slaughtering an entire company of demonic troops on his own at one point. However, he was defeated in a one-on-one duel against the lord and, as punishment, had the tips of his horns (A symbol of a demon's pride) severed and replaced with blunt iron orbs. Since then he has served as a member of the Praetorian Guard under the Varahkhan, carrying out special missions for his king.
Agares is physically the strongest of the Praetorian Guard, able to level a mountain with a single punch. The iron orbs on his horns are also magnetically charged, allowing him to use the power of magnetism to his advantage, and his hide is as strong as steel. Out of all the techniques he employs in battle, his favorite is to take an enemy by a protruding limb and spin them around to bat away other nearby foes before hurling them into their comrades. He has titled this technique the "Bane Shot."
Agares, being the only member of the Praetorian Guard forced into the Varahkhan's service, harbors a great deal of resentment toward his liege and wishes for his downfall. Since becoming a Guard member, he became bitter and violent even toward his allies, although he secretly deals with those whose goal is to dethrone the Varahkhan. Underneath his hot-tempered exterior, Agares is a wise individual with a great knowledge of strategy that makes him invaluable to the Varahkhan. His greatest wish in the world is to see his master dethroned, and failing that, to die fighting him.