Zeoticus Gremory

Lord Gremory is the current head of the Gremory Clan of Devils. He is the father of Rias Gremory and Sirzechs Lucifer.

Appearance
A middle-aged looking man with crimson red hair.

Personality
Coming from the Gremory Clan that has extra-ordinary affection, Lord Gremory has demonstated a very kind disposition.

History
Little is known of Lord Gremory's past, except that he married Venelana Bael and eventually gave birth to two children: Sirzechs and Rias. When Sirzechs became the Satan Lucifer lost his right to become the Head of the Gremory Clan, Lord Gremory makes an arrangement with the Phenex Clan for his daughter to marry Riser Phenex at some point before the series.

The Red Dragon Emperor's Awakening
He first appears in Volume 2 at Rias' engagement party and was shocked at the sudden appearance of Issei Hyoudou that is set up by his son. After Issei beats Riser Phenex, he has a conversation with Riser's father, Lord Phenex, apologizing to him and Riser for the results of the match as well as the broken engagement (although Lord Phenex didn't really mind).

The Heroic Oppai Dragon
In Volume 12, Azazel remembered a conversation he had with Lord Gremory, where he told Azazel that he sometimes questioned himself if Sirzechs can be called a Devil. When asked by Azazel, Lord Gremory states the Sirzechs is a mutation of a Devil and that both Sirzechs and Ajuka are the only Super Devils of the Underworld, stating that perhaps it is their destiny to become Satans because there is no other post for the two of them.

Powers & Abilities
Lord Gremory has been stated to have exceptional abilites in the use of magic.

Trivia

 * In both the light novel and manga, he and Lord Phenex discuss about the Welsh Dragon and the impending arrival of the Vanishing Dragon, while in the anime this conversation is held between Sirzechs Lucifer and Grayfia Lucifuge.
 * In Volume 14, Rias mentions that Lord Gremory has a pact with a Magician.