Answer
Dragan Armansky, played by Goran Visnjic, is a key character in "The Girl with the Dragon Tattoo." He is a wealthy businessman and the head of the Armansky family, a powerful and influential clan with ties to the criminal underworld. Armansky is involved in the investigation of the disappearance of Harriet Vanger, and his actions and motives become increasingly suspicious as the story progresses.