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which Hiruko refers to as a living madogu. It functions as a second heart, and even gives off an energy that is able to be detected by those who can sense the presence of other living beings. Hiruko wears it on his back. The Kesshu turns normal blood into what Hiruko calls magic blood. While it runs through his body, the quantity of blood increases and thickens. Hiruko can also control his blood, even if it is not in contact with his body. According to Domon, Hiruko's speed is on par with Tokiya's, who he has fought evenly with.
 * Sword of Blood: Hiruko stabs himself in the hand with a dagger, allowing his blood to flow from his hand, and harden it into a makeshift sword.


 * Water-cutter of Blood: Hiruko uses his still wet blood to slash the opponent several yards away. It can cut through stone.


 * Shield of Blood: Hiruko hardens blood around a certain part of his body into a small makeshift shield, it is more durable than Mikagami's ice from Tsurara Mai.


 * Blood Coating: By spraying or somehow covering his opponent with his blood, Hiruko then hardens it into a makeshift shell to keep his enemy from moving. This is used to set up Hiruko's Ketsu Kandan technique.


 * Ketsu Kaidan: Hiruko hardens his blood, and throws it at a target with enough force to bite into a steel wall. Domon describes the attack as being like bullets of blood.


 * Ketsu Kaikyū: By hardening his blood around one of his hands, Hiruko can use the blood as a battering weapon.

The weakness to the Kesshu is that if Hiruko uses too much blood at one time, he will need a transplant of the same blood type, which is why he fought Domon in a room with extra containers of blood in case he needed to replenish himself.
 * Blood Absorption: When Hiruko is low on blood, he can absorb more blood into himself to keep himself from passing out from blood-loss and continue using his techniques.

He also has a high, if not superhuman tolerance for pain, because his madogu requires him to injure himself by drawing blood, usually by stabbing himself through the hand, or allowing himself to be pierced by his enemy's attacks.

Hiruko can also create illusionary copies of himself to distract his opponent. Whether they are created through the Wakemi technique or merely after images created by raw speed is unknown.