Shinga

Wild grey hair juts upward in stiff spikes above Shinga's brow, and a red jewel is set into the middle of his forehead. Dark markings streak across his face, while lengths of bandage wind around both of his arms.

Arrogance and an unquenchable thirst for power drive Shinga. So fierce is his craving for greater strength that few limits exist on what he will do to seize it.

Once a laboratory scientist in the service of the Third Hokage, Shinga worked with two subordinates to devise a formidable new art, the Jibakugan, whose control he alone understood. It reaches into a target's subconscious and drags forth their buried hatred, turning those emotions into a weapon he can steer; he claimed the technique went beyond hypnosis and left no room for resistance, though Naruto Uzumaki, who carried the Nine-Tailed Demon Fox within him, broke free of its hold. He also fashioned a chakra-devouring demon, Shinki, capable of draining the very land.

Judging the work morally corrupt, the Third Hokage banned it and sent Itachi Uchiha after its creator, yet Shinga escaped and was assumed dead in a mudslide. He resurfaced to draw the demon seed out of the Konoha Sealed Hall before merging with it, an act that left Tsukigakure engulfed by a vast tree and granted him the power to steal chakra outright, before the united efforts of Naruto and Sasuke Uchiha finally killed him.