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Aku Doge, the first example of an Aku enemy

For other uses, see Akuma.

Aku Enemies (悪魔 Akuma, Devils or Demons), also known as just the Aku, are a type of Enemy Unit first introduced in the Empress' Research stages and Uncanny Legends. They are the second blue enemy type in the game, though they are a darker shade of blue than Aliens, with black accents. Most Aku carry at least one of two exclusive abilities: Shields are a Barrier-like defense that absorbs cumulative damage which regenerates each time their bearer receives a damage-based knockback, and Death Surge gives its user a chance to produce a Surge Attack when killed.

Like Angels, all Aku lack the Floating trait.

See here for a list of units with anti-Aku abilities.


  • Aku (悪) is a Japanese word meaning "evil" or "wickedness".
  • In all main versions of the game except the English Version, the Aku trait's name directly translates to "Devil" or "Demon".
  • There is an inconsistency with the pluralization of Aku. In unit descriptions it's just Aku, but on Aku Researcher's sign it's Akus.
  • Aku have their own writing system consisting of pixelated upside-down or sideways katakana. This text is not translated between languages.
Source Text Kanji Translation
Aku Cyclone's ring アメニモマケズ
A Devil
unbeaten by the rain,
unbeaten by the wind,
bested by neither snow nor summer heat
Evil Aku Researcher's sign (red text) アクマジョウホウ 悪魔情報 Devil Information
Evil Aku Researcher's sign (black text) マカイノトビラハネコジョオウニヨッテヒラカレル 魔界の扉はネコ女王によって開かれる Cat Queen opens the gates to the Devil World
Button for uncleared Aku Realms stages イセカイカラエネルギーヲスイトリ
Stealing energy from another world;
the Devils' Fortress seals levels
World of Darkness Meow Medal マカイ 魔界 Devil World
Cat Researcher's sign (red text) ネコジョウホウ ネコ情報 Cat Information
Cat Researcher's sign (black text) ナニヲカンガエテイルカワカラナイセイメイタイ 何を考えているか分からない生命体 Lifeforms whose thoughts are unknown
Brainwashed Eraser Cat and Malevolent Eraser Cat ネコケシ ネコ消し Cat Eraser
  • Thaumaturge Cat's staff seems to bear the "evil eye" associated with Aku, though it may just be a reference to Magical Circle Guru Guru, as it predates Aku enemies.
  • This type may have been inspired by the Death enemies from YuruGeGe, which also looked demonic and had a barrier-like ability that blocked off damage.
    • Aku enemies' designs could've also been based off of Zombie Cat's Evolved Form, Devil Cat.
  • Most Aku have yellow eyes; those with none or black eyes tend to be peons or Wicked/Malevolent Cats.
  • Many Aku enemies have descriptions pertaining how they came to be after making a devilish deal.
  • The first Aku enemy is technically Dark Emperor Santa, who was retroactively given the trait in version 11.3.
    • As such, Dark Emperor Santa is the only Aku enemy whose body is not mainly that of a dark blue color.
  • Despite being introduced later than the Relic trait, Aku was listed before Relic in all menus such as the Upgrade Menu until Version 13.3.
  • Aku, Relic and Traitless are the only standard enemy types without Fruit Treasures.

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