Raised from childhood to be a deadly assassin, bred specifically to serve the Haku a Doth (known to the general population as “The Teeth”), Koshu and his twin brother Kumo became a ruthless duo, thriving on the death they dealt together. Koshu, a master of blades, torture and stealth complimented his brother’s alchemical and toxicological expertise perfectly.
However when Koshu finds a mark he isn’t willing to eliminate, Kumo was quick to dispatch his brother and maintain his own honor. Unfortunately for Koshu, Kumo’s favorite poison was a concoction that rapidly disintegrates flesh, and is consumed by it before his alleyway doctor can nullify the effects.
Koshu awakened the same evening, flesh partially eaten away to the bone, eyes clouded to a milky white, granted ghostly powers and a sateless hunger to protect his only friend, Stitcher.