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……Hello. I’m Falbium.

–Falbium introducing himself to the Occult Research Club, Light Novel Volume 8, Extra Life. The Fun Family of the Gremory


Falbium Asmodeus, formerly known as Falbium Glasya-Labolas, was the Satan Asmodeus who was in charge of Military Affairs, prior to the events of 666. He is related to Zephyrdor Glasya-Labolas, Iryuka Glasya-Labolas and the unnamed deceased former heir.


Falbium is a tall man whose head is completely bald and has a goatee on his chin.


Falbium is a very lazy person, spending most of his time sleeping, and lives by the thought that “working means losing”. He is usually unenthusiastic in doing anything. Despite his laziness, Falbium can also be selfless, as he joined Sirzechs and Serafall in the neverending battle against Trihexa to prevent it from endangering the world.


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.

Powers & Abilities

Immense Demonic Power: As one of the Four Satans, it is presumed that Falbium is an extremely powerful Devil.

  • Absolute Defense: An ability which Falbium Asmodeus was born with. It can, as the name suggest, "Block All Attacks". Falbium's body is constantly wrapped in its aura. When in battle, the aura intensifies and becomes visible with an orange color. Destroying this aura is impossible for even beings superior to High-Class Devils. The light of the Angels, which Devils are usually weak against, cannot move Falbium's aura one bit. The Power of Destruction from Sirzechs Lucifer is the only thing that can disable it, but the barrier aura can always be regenerated back up. It has been said that the only Devils who are able to harm him are Sirzechs Lucifer, Ajuka Beelzebub, Serafall Leviathan and Grayfia Lucifuge (and of course Rizevim Livan Lucifer).
    • Offensive Position: An offensive application of the "Absolute Defense" created by Falbium Asmodeus himself. This one and only attack he developed was one that would absorb all attacks aimed at him, and allow him to counter-attack with his demonic power. By switching his "Absolute Defense" Aura into "Offensive Mode", he is able to release the power of the absorbed attacks into one single, combined blast. In the Civil War he eradicated an attack group of two hundred Elite-Devils with one attack through this technique. 

Master Tactician: Being the former Satan in charge of military affairs, Falbium is also known for being the Underworld’s greatest tactician and strategist, during his youth, he served as the tactician for the Anti-Satan Faction during the Devil Civil War, significantly contribute to the victory against the Old Satan Faction with superior plans for Sirzechs, Serafall and Ajuka's troops and has gathered many talented subordinates to handled the majority of his duties. Falbium stated that Ajuka is the only Devil who can match his tactical genius.


  • The only known member in Falbium's peerage is the "Blue Holy Bull", Kuyutha.[1]
    • Kuyutha in Arabian mythology is the bull that was supported underneath by Bahamut in stabilising the world.
  • Falbium's name is derived from the names of two machines from the Gundam TV series, G-Falcon of After War Gundam X and Dendrobium, GP03 of Mobile Suit Gundam 0083: Stardust Memory.
  • Falbium has been given the nickname Satan Green and has the "Holy Bull" Kuyutha as a member of his peerage. In One Piece there is an Admiral named Ryokugyu which translates as Green Bull.


  1. High School DxD Light Novel Volume 8 Afterword