Senōchi

Senōchi is the result of a successful extraterrestrial DNA experiment on a human newborn by in his older days. The experimental surgery was performed to save the life of a victim suffering from an extreme case of. While the expectations of the DNA binding were extremely low and the side-effects unknown, a complete new genetic engineering surfaced and indirectly granted Kabuto to create a new specimen that branches from humans. Despite his success, the scientist refused to share his accidental success with his former master and the others, leaving him in a predicament. Unable to raise the child amongst his children from the orphanage, aware that Konoha had the power to unravel the uniqueness they carried, Kabuto abandoned his protégé in the hands of Wind nomads with a special bundle of books that can only be opened with the child’s chakra.

In and of itself, Senōchi is the pinnacle of life; and genetically only carried by Kōsei. His entire bodily functions related to blood shifted ― and a complete counter to his disorder. It seems to have disrupted the regular chakra pathway system, making it more complex for him to utilise chakra for even the most simplistic (elemental) techniques known by shinobi. Because Senōchi’s original development was meant to cure him from it, Kōsei gained immunity against most illnesses, poisons and diseases but also inhuman healing speed from the most fatal injuries to even regrowing limbs with the thanks from constant production of red blood cells. By touching his (self-inflicted) wounds with his concentrated chakra, Kōsei can temporarily slow-down the healing process for merely a minute. This gives him the opportunity to transfer his blood to a patient to heal them from any state, who can obtain a mere portion of his enhanced physical strength temporarily. The duration of this effect is dependent on the amount of blood received and needed to heal from their injuries or illnesses, which is why the Kazekage forbade Kōsei to use his unorthodox method of healing.

His healing ability is one of the greatest gifts Senōchi grants him, but it’s also a curse. It seems like his sensory receptors that send signals to his nerves aren’t familiar with the concept of pain; he feels nothing. Instead, Kōsei has heightened senses for hearing, smell and taste, which seems to amplify while using appendages made from his inhuman blood. Ironically, it’s then that his receptors for pain become active because the mantle of blood is full of nerves that return to the core of his existence.