Odin

Odin in High School DxD is the former chief god of Norse mythology and the leader of the gods in Asgard. He wields the legendary spear Gungnir and is portrayed as an elderly man with long grey hair, a matching beard, and distinctive attire including a blue robe with gold accents and a special monocle over his left eye (reflecting his mythological sacrifice of an eye for wisdom).

Despite his divine status and great power, Odin has a notably perverted personality—he frequently harasses women, enjoys lewd antics, and visits places like "Oppai Clubs." He's otherwise laid-back, wise, and supportive of peace among the factions (devils, angels, fallen angels), often appearing in situations involving the main cast, such as during conflicts with Loki or Khaos Brigade threats. He was formerly accompanied by the Valkyrie Rossweisse as his bodyguard/attendant (before she joins Rias's peerage).