Chainsaw Man Wiki

"Just you wait, Chainsaw Man! I'll make you vomit nuclear weapons back up!"

Yoru (ヨル Yoru?) is the War Devil (戦争の悪魔 Sensō no akuma?), a devil that embodies the fear of war and a member of the Four Horsemen, who now occupied Asa Mitaka’s body as a Fiend.


The War Devil is only seen briefly, but appears to have a bird-like body, similar to a dark colored owl or potoo.

After taking over Mitaka's body, the War Devil took on her appearance, but with added facial scars across her face and left cheek which are in the same location where Mitaka's face was slashed by the Class President. In this form, the War Devil's eyes also have multiple rings in her eyes similar to Makima’s, another Horseman. Her hair is also worn loose. In Mitaka's form, the War Devil wears the school's female student uniform.


The War Devil is confident and prideful, treating its opponents as mere warm-up and confidently vowing to take back Nuclear Weapons from Chainsaw Man, contrary to its fellow horseman, Makima, who only thought it was a possibility to win against him. Also similarly to Makima, the War Devil is more than willing to use people for her own goals, forcing Mitaka to work with her under the threat of death.

The War Devil is very bold and blunt, and will not hesitate to do unusual or embarassing things if they serve its goals, such as immediately attempting to make Yoshida her boyfriend, embarassing Mitaka, and bluntly telling Mitaka about the possession situation. The War Devil also has a very flippant attitude towards death, easily murdering or offering to murder people for things ranging from actual crimes to bullying.



As a member of the powerful group of Devils known as the Four Horsemen. They, along with the Weapon Devils once waged a brutal battle against the Chainsaw Devil in Hell, but at the height of the battle, the Chainsaw Devil disappeared, making them unable to find him.[1]

War Devil arc

Appearing on Earth, the War Devil took over the body of Asa Mitaka. And after quickly disposing two humans as warm-up, the War Devil vowed to make the notorious Chainsaw vomit back up the Nuclear Weapons Devil who he previously ate.[2][3]


Physical Abilities

Enhanced Speed: The War Devil is able to move very quickly, easily jumping around and dodging attacks from the contracted Class President.

Enhanced Strength: The War Devil was able to pull Tanaka's head off his shoulders and spinal cord out of his body, requiring a great deal of force, and is able to easily carry objects as big as herself with one arm over her head.

Supernatural Abilities

Flesh Weapon Creation: The War Devil is able to make anything in her possession, specifically human and fiend, into a variety of deadly weapons almost instantaneously simply by touching them.[4][5] This does not appear to immediately kill the human, as they can still scream in agony. The weapons created by the War Devil so far are:

The War Devil holding the Tanaka Spinal Cord Sword

  • Tanaka Spinal Cord Sword (田中脊髄剣 Tanaka Sekizuiken?): A long crooked sword that the War Devil created using Tanaka’s head and spinal cord that it ripped out of his body.[6] Sharp enough to easily cut through devil-enhanced flesh with ease.[7]

The War Devil creating a hand grenade

  • Flesh Hand Grenade (手榴弾 Shuryūdan?): A hand grenade that the War Devil created using the arm from the contracted Class President.[4] And it is shown that it is able to detonate like a normal grenade.[8]

Contract Creation: As a devil, the War Devil can bestow contracts upon humans for a price. However, The War Devil lost this ability when it took over Mitaka’s body, as a fiend cannot make a contract.

Blood Consumption: As a devil, the War Devil should be able to restore its health by consuming blood.[9]

Body Possession: As a devil, the War Devil could take over a dead human body and their consciousness, becoming a fiend. In this state, they could still use their devil ability albeit significantly weaken. Like all other fiends, the War Devil also has a distinct feature on her head. [10] That being her facial scars, which only appear while it is in control of the body.[11]

  • The War Devil took over the body of Asa Mitaka after her head got sliced in half.[12] The War Devil, however, only took over half of her brain, leaving Mitaka’s consciousness intact while still being able to switch with it to take control over Mitaka’s body anytime it wants.[13][14] While in this state, whoever isn’t in control of the body will appear as a hallucination to the other and could even communicate to them.[15]

Revival: As a devil, the War Devil should revive in Hell after being killed effectively making it immortal.[16]


Swordsmanship: In the body of Asa Mitaka, the War Devil is a skilled swordswoman. It was able to easily take down the contracted Class President with her sword.[7]

Chapter Appearances

v  e
Control Devil arc
80. A Dog's Feelings Absent
81. Paw Absent
82. Always Eat A Hearty Breakfast Absent
83. Death, Resurrection, Chainsaw Absent
84. Hero Of Hell Mentioned
85. Bloody Good Gut Feeling Absent
86. Date Chainsaw Absent
87. Chainsaw Man vs. the Horrifying Weapon Humans Absent
88. Star Chainsaw Absent
89. Go Get 'Em, Chainsaw Man Absent
90. Super Power Absent
91. Power, Power, Power Absent
92. Zombie, Blood, Chainsaw Absent
93. You & Crappy Movies Absent
94. Chainsaw Man vs. the Weapon Humans Absent
95. Chainsaw Man vs. Control Devil Absent
96. This Kind of Taste Absent
97. I, Love, Chainsaw Absent
v  e
War Devil arc
98. Bird & War Debut
99. Two Birds Appears
100. How to Walk Shoeless Appears
101. Afterschool Devil Hunters Appears


  • The War Devil’s bird-like appearance could be a reference to the little owl that accompanied Athena, the goddess of warfare in Greek Mythology.
  • Yoru could be translated as "night" as a counterpart to Asa, which could be translated as "morning".


  1. Chainsaw Man Manga: Chapter 87, Page 2
  2. Chainsaw Man Manga: Chapter 98, Page 48
  3. Chainsaw Man Manga: Chapter 84, Page 11
  4. 4.0 4.1 Chainsaw Man Manga: Chapter 98, Page 45
  5. Chainsaw Man Manga: Chapter 99, Pages 17-18
  6. Chainsaw Man Manga: Chapter 98, Pages 41-42
  7. 7.0 7.1 Chainsaw Man Manga: Chapter 98, Page 46
  8. Chainsaw Man Manga: Chapter 98, Page 47
  9. Chainsaw Man Manga: Chapter 1, Page 13
  10. Chainsaw Man Manga: Chapter 4, Page 5
  11. Chainsaw Man Manga: Chapter 99, Page 14
  12. Chainsaw Man Manga: Chapter 98, Page 40
  13. Chainsaw Man Manga: Chapter 99, Page 7
  14. Chainsaw Man Manga: Chapter 99, Pages 13-14
  15. Chainsaw Man Manga: Chapter 99, Page 5
  16. Chainsaw Man Manga: Chapter 53, Page 13

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