For other meanings, see Onoskelis (disambiguation). 

Onoskelises are common, feminine demons found in nearly all layers of Hell from the Agony series.


The Onoskelises are demons that have a body of a woman, but a head that resembles a Venus flytrap sporting horns, and hairless goat legs. Some also have jewelry and/or protruding horns on certain parts of their body.

Most Onoskelises have different horns (straight, curled, etc.) and skin color (red, deep violet, etc.). These demons are in fact female-only species, and has no male candidates. They also cannot climb on cosmic substance.


The Onoskelises are mentally unstable female demons that cannot see but only sense. They attack their prey if caught and sometimes get sexually aroused but quickly return to their primitive state and brutally kill their victim. It is clear that these demons have arousal feelings but barely gets into it, due to their primal instincts overpowering their lust for skinship.


Onoskelis is a Jewish female demon with a beautiful form mentioned in the Testament of Solomon. The name is usually associated with the hobgoblin, Empusa, who was able to assume various shapes, however in this case, she is a satyra (female satyr).



According to dev blogs, they're created from the souls of female martyrs that cause enough suffering to others while in Hell, similar to chorts. This is backed up by the in game painting, seen in the back corner of the dining room with the spider on the table, showing a woman being transformed into an onoskelis.

Onoskelises are blind and can only sense, hear, and feel. Nimrod's best way to avoid getting killed by these demons is to keep his breathing noise down. Holding his breath is key to getting pass if he have no choice but to pass them in close range. The skills that is recommended is increasing the stamina and reducing the amount of noise Nimrod make as a damned soul.

Onoskelises are also more attracted to torches, as mentioned by the surviving man, they are looking for warmth; even for a brief moment. So to attract the demons away from blocking Nimrod's path, or stuck in a spot where he might end up getting stuck with it. Nimrod can try throwing his torch in a direction in the room and sneak past it as it gets some comfort from the fire.

Some Onoskelises uses their powers to either kill Nimrod in far range distance with pyrokinesis or push him off the edge with telekinesis to kill him. But of course when obtaining a soul upgrade, Nimrod can possess them. It is not recommended to use them all the time, use them to clear off dangerous foes and then (if he want) kill himself as an demon and possess an damned soul with a clean and hopefully safe path. However they cannot kill Chorts easily or even Ugly Goddess, so avoid them at all cost.


To be added.


  • The Onoskelises are supposed to be created by Lucifer according to the note.[1] The game's lead creator, Tomek Dutkiewicz, confirmed the fact as not apparently true due to an error in the English translation.[2]
  • Onoskelis is declared to be the community fan's favorite and an icon of the Agony series.[3]



  1. "Her seal was signed “Onoskelis,” and it is the Devil Himself who shapes the body of this beast. Not many have survived a meeting with this being, and it is she who always appears first and who changes life into a nightmare. They say that when you’ve met her once, she’ll never leave in peace. She’ll play with you and torment you until you go insane. Her breath will constantly bristle the hair on the back of your neck and as soon as you feel safe, she’ll rip your heart out of your chest, laughing in a guttural voice..." - "Onoskelis" note
  2. Madmind Studio Discord
  3. "Agony UNRATED Background image with Onoskelis demon. The most popular, fan favorite female demon in the game! She quickly became an icon of Agony." - Agony UNRATED Background: Onoskelis

Red GoddessThe Beast
High-Ranking Demons
Low-Ranking Demons
Basics: AmazonCherubChortHarpyOnoskelisSirenSuccubiUgly Goddess
Unique: Enormous ChortFrozen OnoskelisWinged Succubus
IfritGhost Octopus
LeviathanLocustSmall SpiderSpiderSnake

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