Drago Zanovic (Russian: Драго Занович, Drago Zanovich) is a Russian mobster responsible for kidnapping former NSA cyber-terrorism expert, Roland Lowry. He also organized the abduction of Eric Lowry and Hawaii Five-0 Officer Kono Kalakaua.
He then used the three as hostages during a deal in which an unknown group brought the Skeleton Key, only for the deal to be interrupted by Kono's colleagues, Steve McGarrett, Chin Ho Kelly and Danny Williams who stormed into the warehouse, triggering a gunfight.
Everyone except for Drago's agent, Natalie Reed and a few henchmen escaped alive with Danny arresting Zanovic seconds later.