"After you've gobbled him down you'd be left alone to regret it while covered in blood and guts. That's the hunger of a ghoul. That's our destiny."
Shoto Todoroki is a 18 year old, bi-hair coloured University student. He's a cool guy who doesn't ta...
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A kagune (赫子, red child) is a ghoul's predatory organ and functions as their weapon and claws. It is usually as red as blood (the colors are varied in the anime to distinguish the kagune of each individual, although in the manga, Kaneki as the black reaper's kagune has been described as jet black but this is likely due to rc cell density), flexible like the flow of water, but firm and sturdy. When released, a ghoul's physique is strengthened, they are more resilient, and their mobility heightens. A kagune is composed of Rc cells, which flow just like blood, can become as solid as teeth and can be described as "liquid muscles." The Rc cells are released from a kakuhou piercing the skin, and the released Rc cells form the kagune. The kagune are voluntary muscles as ghouls can control them whenever they want and repeatedly harden and soften them at will. Kagune size depends on the Rc cells' quality and quantity while the shape depends on the creativity and intellect of the user.
Although a ghoul's healing ability is high, the healing of wounds tends to be delayed if the wounds are inflicted by a kagune. It is also evident that in order to counter a kagune in battle, one must also have a kagune. Hence, ghoul investigators use kagune-based quinque as a tactical means to battle against ghouls.
Formation
Research conducted by the CCG Laboratory Division resulted in identifying three stages of kagune formation. At their current knowledge, the stages are the same for every ghoul capable of manifesting kagune.
Formative stage
At the point base of the kagune where the Rc cells erupt from the kakuhou, the erupted Rc cells will form bonds with each other. They will organize themselves in the structure best fit for their Rc type in a repeated web. This repeated action of the cells will occur instantaneously and lead to the next stage.
Fixative stage
The bonded Rc cells will retain the resulted form for a fixed length of time. The basic shape of the kagune is seen at this stage. During this time, the defensive and offensive capabilities and weaknesses will take on their respective properties to the ghoul's Rc type. The manifested kagune's appearance is usually hereditary, taking on the shape and characteristics of their genetic predecessors, additionally, kagune size also depends on the Rc cells' quality and quantity while the shape depends on the creativity and intellect of the user. In relation to this stage is the user's manual control of the kagune's movement and actions, which can include crystallization and increase in length, dexterity, sharpness, and concentration.
Disintegrative stage
After time has elapsed, the bonds between the cells begin to break apart. At this point, the kagune loses its solidity and deteriorates.
