Falbium Asmodeus

Falbium Asmodeus, formerly known as Falbium Glasya-Labolas, is one of the Four Great Satans. He is the Satan in charge of military affairs in the Underworld.

Personality
Falbium is a very lazy person, spending most of his time sleeping, and lives by the thought that “working means losing”.

History
Falbium came from the House of Glasya-Labolas and was part of the Anti-Satan Faction before being promoted into the Satan Asmodeus sometime before the series began.

Birth of the Breast Dragon Emperor
He first appears in Volume 5 during the Young Devils Gathering.

The Heroic Oppai Dragon
In Volume 8, Falbium acted as Satan Green and test both Issei and Rias on the history of the Underworld during their engagement ceremony at the Ruins of Connection.

While Falbium did not appear in Volume 12, he was the one in charge of the battle strategy to counter the attack by the 12 Bandersnatch created by Leonardo's Annihilation Maker.

Powers & Abilities
As one of the Four Satans, it is presumed that Falbium is an extremely powerful Devil. Falbium is also known for being a great strategist, and has gathered many talented subordinates. However due to his laziness, he constantly leaves his work to his subordinates.

Trivia

 * Falbium is the Satan who has shown up the least in the series.
 * The only known member on Falbium's peerage is Kuyutha.