The Oni Kind (鬼種, Kishu?) are a Phantasmal Species and a type of demon symbolized by inferno and scorching heat.[1] They declined as human civilization advanced, and are now all but extinct.

In Colorful Moon Tsukihime, Oni are said to exist in the following varieties:

  • Those who were from the start referred to as Oni, and fundamentally distinct from humans.
  • Those humans who by way of aberration (変異, hen'i?) become as Oni.

Known OniEdit

The following is a list of known Oni that have appeared within the canon:


Akiha crimson

Akiha close to becoming Crimson Red Vermillion, evident by her red hair

In the past of Japan, many families wanted to crossbreed with the Oni Kind. This resulted in the present clans of Mixed-Bloods, such as the Tohno and the Kishima. The relationship between the half-breeds and the oni is not unlike that between the Dead Apostles and the True Ancestors. Both the oni and the mixed-bloods have been in conflict with the Demon Hunter Organization for quite some time.

Those with thick oni blood are often overwhelmed by their blood with Inversion Impulses, and those that maximize the blood are called Crimson Red Vermillion (紅赤朱, Kurenai Seki Shu?). Also known as Ancestral Return (先祖還り, Senzo Kaeri?), they are enveloped by an illusion-like fog and their demon blood overwhelms and consumes their human blood. Those that become Crimson Red Vermillion are never able to return to being human again. Having thick demon blood, Akiha Tohno has a high chance of becoming one. Her hair is normally red because she is close to becoming one, but she manages to keep it black by suppressing her powers. The only other known Crimson Red Vermillion is Kouma.[2][3]

Known Powers of Oni Mixed BloodsEdit

There are many ways the blood of the oni can manifest itself as a special power. A few special powers that emerged from strong oni blood, were the ability to move things without touching them, fangs that could be used to take bodily fluids from other people and being able to reverse the temperature with a glare to freeze an opponent. There exists also a specific ability related to weapon manufacturing. When the time of a real battle comes, they cut off one of their arms and create their final and greatest blade out of their bones. Kouma Kishima as an example possesses massive physical strength, speed, as well as a body as hard as steel. His physical prowess gives him the power to crush trees with his bare hands. Other known powers are:

Death Resistive BodyEdit

Death Resistive Body (拒死性肉体, Kyoshisei Nikuta?) is the mixed-blood ability of the real SHIKI Tohno.[4] Instead of simply regenerating from heavy wounds, his body is able to reshape on its own, so that he can survive even without vital organs. This also allows him to crystallize his blood, which then can be used as an extremely fine sword or thrown weapon.

Eroding DetachmentEdit

Eroding Detachment (蝕離, Shokuri?),[5] an ability of the real SHIKI Tohno. It allows him to take in a body part of another person, by eating their flesh, and then use it as his own. It's basically like an organ transplant without a limit. This ability also allows him to reattach lost limbs and to junction his lifeforce on to another living individual, and continue to live on through that method.


Plunder (略奪, Ryakudatsu?),[6] is the mixed-blood ability of Akiha Tohno is to steal the Life-Force of all living beings within her sight through a Cursed Field of 'plundering'. But at the same time it is a double-edged sword as she can plunder someones entire concept with it as well.

Shikigami OperationEdit

Shikigami Operation (式神行使, Shikigami Kōshi?) is an ability that Akiha has, but details are unknown. Although this is what sounds like how she saved Shiki's life, since a Shikigami in oriental myths is animating a dead animal or non-living object and using it as a servant.


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