Agents of Mayhem Wiki

Oni, A.K.A. Masamune Senichi is a M.A.Y.H.E.M. field agent and apart of the Firing Squad, alongside Kingpin and Scheherazade.

To unlock Oni as a playable character, players need to complete Operation: Demon & Fox.


The son of a Japanese businessman, Senichi shamed his family by entering the world of organized crime. But when he discovered that the Boss of his family was working for the Ministry of Greed, he brought down the organization from within. When MAYHEM ran across him taking on a Yakuza army all by himself – and winning – Persephone had to have the man on their side.


Name Icon Quote Description
Silenced Pistol
Icon Silenced Pistol
Oni is an efficient killing machine using stealth and his silenced pistol to take out LEGION.
Fear Tactic
Icon Fear Tactic
Your attacks delivers an automatic critical hit and panics the target.
Fear the Demon
Icon Fear the Demon
All surrounding enemies become panicked, each kill increases the duration.


Agents Skins []

Weapon Skins[]


Oni's Vehicle is a custom Torch, His vehicle skin is called "Speed Demon" and the major differences of his car is the front bumper and splitter, the rear bumper and lights, the large spoiler on the rear and the wheel arches. the paintjob of his car is primarily red with some purple designs


  • Oni's The Joking Killer agent skin and The Punchline weapon skin are references to The Joker, a main villain and main antagonist in the DC Comics Batman series.
  • Oni's shirtless "Demoni" skin with exposed Hanya tattoo and mask is a reference to the character Goro Majima from the Yakuza video game series, as the character is commonly shown shirtless with a similar Hanya tattoo.
  • Oni's "Dragon Rising" skin with an orange suit designed like a prisoner outfit covered in blood is a reference to Hannibal Lecter, the antagonist in the films "Red Dragon" and "Hannibal Rising".
  • Oni's "Prince of Demons" skin is a reference to the deceased musical artist known as Prince.
  • In Japanese folklore, Oni is shown in different forms from demon, ogre, troll, and the common mischief makers in European myth Goblins, in jest since Oni is born from Japan.
  • Oni has a daughter named Aiko and an unknown named wife both of whom are held captive by the remnants of his former yakuza clan.





Agents of Mayhem- Oni Intro


Firing Squad Trailer


Agents of Mayhem- Meet Oni


External links[]

Firing Squad

Playable Agents
BraddockDaisyFortuneGatHardtackHollywoodJouleKingpinLazarusOniRamaRed CardSafewordScheherazadeYeti