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Fire Force Wiki
Demon Infernal
Haran's Fireball.png
Generation Info
Romaji Oni
Manga Two-On-Two Death Match
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A Demon (鬼, Oni) is a rare type of Infernal that is characterized by being horned and having a stronger heat signature compared to normal infernals.[1] Like ordinary Infernals, Demons can be created by a Bug as well as being sentient.


Demons most notable difference to normal Infernals are how difficult they are to kill, due to their strength and durability. Their skin is capable of withstanding being shot at by normal weapons,[2] as well as being cut by strong Third Generation plasma and fire attacks, resulting in tremendous amounts of power needed to kill one.


  1. Fire Force Manga: Chapter 103, Page 18
  2. Fire Force Manga: Chapter 108, Page 8