Ukon is the twin brother of Sakon, the final character in the Sound Four created by Kishimoto. While fighting Kiba and Akamaru, Sakon created Ukon to even the playing field. Ukon is the type who is impatient and wants to end battles quickly. He resides in Sakon's body, with only his head protruding from Sakon's back. He is able to extend an arm or leg out to increase attack, or defend blind spots.