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Phrases that I hear often. Are you people perhaps saying this to all the people related to the current government of the Underworld? Words that are filled with anger. There isn’t any elegance nor am I interested in them. –In other words, I find you boring.
I know that it is pointless to talk to you. It can’t be helped. I will do my job as a Maou, which I haven’t been doing for a while. –I will eliminate you all.
You came here knowing about my ability right? Did you actually think that if it was your demonic-powers, then it will work against me? Or are you shocked because it ended like this even though you powered up yourself? Either way, it’s impossible for you guys.
~ Ajuka fighting the Old Maou Faction


Ajuka Beelzebub is the current leader of the Underworld and the only Satan left after the events of 666. He is the Chief Advisor for the Technology Department and the creator of the Evil Pieces system and the Rating Game. He is Sirzechs' best friend and rival and is a Super Devil like him.

Power and Stats

Tier: 6-C, higher with Kankara Formula | Low 6-B, higher with Kankara Formula

Name: Ajuka Beelzebub, Ajuka Astaroth (formerly), "Satan Blue", "The One who Controls Techniques and Laws"

Origin: High School DxD

Gender: Male

Age: Around 560 years old (Fought 60 years on the Devil Civil War, which ended before 1535 per Heinrich Cornelius Agrippa's status as Zeoticus' Bishop)

Classification: Devil, Pure-blooded devil, Super Devil (Satan), One of the Four Great Satans

Powers and Abilities: Superhuman Physical Characteristics, Aura, Magic, Longevity, Flight, Summoning, Shapeshifting, Teleportation, Energy Projection, Illusion Creation, Enhanced Senses, Forcefield Creation, Dimensional Travel, Mind Manipulation, Memory Manipulation, Genius Intelligence, Extrasensory Perception, Creation of inanimate matter, Power Bestowal (Can create Evil Pieces which grant abilities to an individual), Pocket Reality Manipulation (Can create "another world" which is completely under his control), Law Manipulation (Can manipulate the laws and rules of abilities and phenomena with Kankara Formula [1]), Attack Reflection (Can control the direction and trajectory of attacks with Kankara Formula [2]), Minor Spatial Manipulation (Easily made a large hole in space, creating a "dimensional gap" when playing as Satan Blue [3]), Information Manipulation (Can control any phenomenon with the use of equations with his Kankara Formula [4]), Non-Physical Interaction (Characters in the series can interact with spirits which are stated to lack physical form [5]), Statistics Amplification and Statistics Reduction (Can alter and manipulate the potency and effectiveness of abilities using Kankara Formula [6]), Resurrection (Can bring targets back to life to be reincarnated as devils with the Evil Pieces), Danmaku (Kankara Formula can create multiple bullets of energy out of any attack and make them home in on targets [7]), Power Modification and Limited Power Nullification (Can fundamentally change and manipulate skills and abilities with the use of formulas and equations; for instance, he caused Tsufame's water projectiles to disperse into mist and evaporate harmlessly [8]), Mathematics Manipulation (Can alter the calculations of abilities, and manipulate abilities and phenomena with equations and formulas), Resistance to Time Stop (Adult Gasper stated that Super Devils can move in his time stopped world [9]), Mind Manipulation and Memory Manipulation via Devil Traits (Devils retained their memories after Raynare wiped the memories of everyone who knew about her human disguise) | All previous abilities to a greater extent.

Attack Potency: Island level (Equal to Sirzechs Lucifer. Stronger than Sairaorg, who deflected an attack that destroyed several islands). Kankara Formula allows him to amplify and control the potency of attacks | Small Country level+ (Comparable to True Form Sirzechs). Can increase the potency of attacks using Kankara Formula

Speed: FTL (Equal to Base Sirzechs) | FTL (Much faster than before, should be comparable to Sirzechs in his true form)

Lifting Strength: Class T (Comparable to Base Sirzechs) | Class T

Striking Strength: Island Class | Small Country Class+

Durability: Island level | Small Country level+

Stamina: High

Range: Standard melee range to at least several kilometers

Standard Equipment: Unknown. Able to create objects and materials out of nothing. 

Intelligence: Extraordinary Genius. He can accurately predict future events, leading him to be feared by the various mythologies and his inventive traits far surpass the likes of Azazel. He was able to threaten Shiva with one of his inventions, and is also the inventor of the Rating Game and Evil Pieces system which is a system used by all the devils in the underworld, used to bestow powers, resurrect and make one part of one's peerage.

Weaknesses: As a Devil, he is more vulnerable to abilities and items that possess holy qualities, such as Holy Swords and the Light Weapons of Angels

Notable Attack/Techniques:

  • Kankara Formula: Ajuka's special ability which allows him to control and manipulate all phenomenon using equations and formulas and modify it to make it into a special move of his own. All phenomena and all powers run on laws and rules all of which have been created with equations, by manipulating these equations, Ajuka is able to manipulate people's powers like his own hands. It is unknown as to what extent he can use Kankara Formula when he is serious.

Key: Normal | Serious

Note: Ajuka Beelzebub cannot be used in versus debates due to the fact that the exact applications and limitations of Kankara Formula are currently unknown.


  1. Volume 12, Life -3
  2. Volume 12, Life -3
  3. Volume 8, Life 6
  4. Volume 12, Life -3
  5. Volume 14, Life 4
  6. Volume 12, Life -3
  7. Volume 12, Life -3
  8. High School DxD Zero, Chapter 3
  9. High School DxD EX, Chapter 4


Notable Victories:

Notable Losses:

Inconclusive Matches:


Discussion threads involving Ajuka Beelzebub