Hades

Hades is the God of the Realm of the Dead. The main antagonist of High School DxD, he is the true mastermind behind the Khaos Brigade, aiding the Old Satan Faction and Hero Faction behind the scenes while scheming to destroy the Devils and Fallen Angels. He commands a legion of Grim Reapers.

Appearance
Hades' body consists of only bones and gives out a creepy aura.

Personality
Hades gets along well with humans but despises the Devils and Fallen Angels, believing that they are unnecessary beings, calling them bats (referring to the Devils' wings) and crows (referring to the Fallen Angels' wings).

History
One of the Trinity Gods of Olympus, Hades is one of the Gods that have been active since the ancient times, ruling the Realm of the Dead.

Plot
He appears in Volume 10 as one of the spectators for Rias and Sairaorg's Rating Game. In Volume 11, he unseals Samael which he lends to the Hero Faction. After the battle, he sends his Grim Reapers to attack the Occult Research Club, before callling them to retreat after Shalba Beelzebub captures Leonardo and forcefully activates his Balance Breaker, creating 13 gigantic monsters to attack the Underworld. In Volume 12, he was confronted by Sirzechs Lucifer and Azazel, which he demanded Sirzechs to reveal his "true form".

Powers & Abilities
Given as his status is that of a God, Hades is stronger than Michael, Azazel and the current Four Great Satans combined.