"It's funny, isn't it? How even the best of men can be... deceived by their true nature."
― Wilson Fisk (Marvel Cinematic Universe)
" The true self that is suppressed—the dark side of one's personality that is buried deep inside."
― Morgana (Persona 5)
"We never lose our demons, Mordo. We only learn to live above them."
― The Ancient One (Marvel Cinematic Universe)

The power to control and harness the power of a demon or beast living inside you.

Also Called

  • Inner Demon
  • Inner Monster


The user can control their inner demons to gain strength and ferocity to destroy anything in their path. Although, the user mustn't let their inner beast overpower them or they become psychotic killing machines, bent on survival and bloodlust. The user must be careful and try to stay calm unless they really need to unlock the beast inside them. The user also takes on the aspects of wild, dangerous, and diseased animals that are insane and almost nothing can stop them.




  • Tranquilizers
  • The user must calm down or their inner beast will turn them into a psychopath and/or rampaging killer.
  • May be vulnerable to bullets and other objects.
  • This power may destroy the user if not used wisely.
  • The user must maintain a focused mind in order to keep this power under control.
  • Removal of the inner beast may result in death due to the process of removal being extremely painful and taxing on energy.

Known Users


  • Beast Boy (Teen Titans); can transform into a savage werewolf-like form
  • Toa Hordika (Bionicle)
  • Orion (DC Comics)
  • Bruce Banner (Marvel Comics); with The Hulk
  • Illyana Rasputina/Magik (Marvel Comics); with her demonic form and persona called Darkchylde, the result of black magic corrupting her soul
  • James "Logan" Howlett/Wolverine (Marvel Comics)
  • Frank Castle/Punisher (Marvel Comics); with the Voice
  • Warren Worthington III (Marvel Comics); with the Archangel persona
  • Henry McCoy/Beast (Marvel Comics)


  • Guts (Berserk); with the hound-like Beast of Darkness, a manifestation of all his rage and hatred
  • Visored (Bleach); can channel their inner Hollows through masks
  • Kang Too Jee (Change Guy)
  • Natsu Dragneel (Fairy Tail)
  • Saiyans (Dragon Ball series); with their Oozaru/Great Apes
  • Inuyasha (InuYasha); being half-dog demon can transform into a full-fledged demon when in life-threatening danger
  • Jinchūriki (Naruto); with their respective Tailed Beasts


  • Dr. Jekyll (Strange Case of Dr. Jekyll and Mr. Hyde); with his inner-evil Mr. Hyde.

Video Games

  • Ragna the Bloodedge (Blazblue)
  • Liu Kang (Mortal Kombat); can transform into a dragon
  • Hanzō Hasashi (Mortal Kombat); struggles with the Scorpion spirit within him when he has control of himself
  • Sonic the Hedgehog (Sonic the Hedgehog); temporarily gained the ability to transform into a werehog
  • Persona Users (Persona Series)
  • Shadows Users (Persona Series)