Sergei Dragunov is a member of SPETSNAZ and a villain in the Tekken series. He is completely silent in the games.
He was working at a dig in a sub-arctic forest digging for an unknown body when his government called him away for a special mission. The people dubbed Dragunov the "White Angel of Death". He was then given orders to go to Japan, possibly to infiltrate The King of Iron Fist Tournament 5. Though he had successfully infiltrated Japan and the tournament, the Russians could not locate the organism called Devil. There was complete chaos all over Russia and Dragunov was busy fighting the enemies in his country. The Russian government feared of what will happen if Jin Kazama is allowed to continue, so they sent Dragunov in to The King of Iron Fist Tournament 6 to kill the Mishima Zaibatsu.
In his Tekken 6 ending, Dragunov and his men capture the lifeless Azazel. Just as Raven claims the orb of Azazel, Dragunov kills Raven with an explosive detonator.