Sacred Gear

Sacred Gears are powerful equipment bestowed to humans by the Bible God. Only humans or human hybrids are born with Sacred Gears. They die if their Sacred Gear is removed. Angels and Devils can obtain them by resurrecting a human or human hybrid as one of their own. Fallen Angels have devised a ceremony to extract and possess a Gear from the original user. Examples of Sacred Gear include Asia's Twilight Healing and Issei's Boosted Gear / Gauntlet of the Inferno Dragon. Another mentioned Sacred Gear is the commonly occuring Twice Critical, which the Fallen Angel Reynalle mistakes Issei's Gauntlet for. Another Sacred Gear is Kiba Yuuto's Sword Birth that creates Demonic Swords. In Volume 10 its revealed that he also possesses the holy equivalent Blade Blacksmith.

Sacred Gear can have a variety of effects, such as Twilight Healing granting near-intstantaneous healing and Twice Critical doubling the power of the user. Yuuto's Sword Birth, for example, can create swords imbued with different attributes, examples include creating a sword that absorbs Holy energy, a sword that erase flame and a sword that absorbs wind.

It is explained that the Bible God created the Sacred Gears as part of His system to enact miracles on earth. It is mentioned that those humans with Sacred Gear have become very powerful and influential, but no example is given. As to why Angels and Devils are never born with them, yet keep them when transformed from humans, is another mystery. Presumably because God never foresaw the new systems of reborn devils and angels which arose after His death. However there is the case of the governor and leader of the fallen angel Azazel creating Artificial Sacred Gear through his research but are inferior to the real ones.

Sacred Gears have an ultimate state of activation called the Balance Breaker which is the most powerful manifestation of the Sacred Gear. Onced reached, the Balance Breaker can be entered again far more easily than the first time. Reaching the Balance Breaker can be triggered by the feelings of its possessor. For the two Sacred Gears sealing the Two Heavenly Dragons Ddraig and Albion, the seal can be suppressed to release their full powers in a state called the Juggernaut Drive (覇龍（ジャガーノート・ドライヴ） Jagānōto Doraivu)

Aside from the normal Sacred Gear, there are the longinus. Longinus are the ultimate of Sacred Gears and each having more than one ability compared to a normal Sacred Gear which only has one. There are 13 Longinus in total.

List of Sacred Gears

 * Boosted Gear (Gauntlet of the Red Dragon, Ddraig)
 * Twilight Healing
 * Sword Birth
 * Divine Dividing (Wings of Light of the White Dragon, Albion)
 * Forbidden Balor View
 * Absorption Line, Blaze Black Flare, Delete Field, and Shadow Prison
 * Twice Critical
 * Blade Blacksmith
 * Variant Detonation
 * Alice Mirror

Sacred Gear Holders

 * Hyoudou Issei
 * Asia Argento
 * Kiba Yuuto
 * Vali Lucifer
 * Gasper Vladi
 * Genshirou Saji
 * Joan
 * Heracles
 * Seigfreed
 * Tsubaki Shinra