*Colonel Xenia Zaragevna Onatopp (Russian: Ксения Сергеевна Онатопп) was a former Soviet fighter-pilot and a ruthless assassin with sexual psychopathy employed by the Janus crime syndicate. The character first appeared as the secondary antagonist in EON Productions' 1995 James Bond film GoldenEye, portrayed by Dutch actress Famke Janssen. Janssen would continue to provide her likeness for several video-games, notably the 1997 Nintendo 64 game GoldenEye 007 and the 2004 spin-off GoldenEye: Rogue Agent (voiced by Jenya Lano).

Born in the former Soviet republic of Georgia, Xenia Zaragevna Onatopp was a fighter pilot in the Soviet Air Force. After the collapse of the USSR, she joined the Janus crime syndicate, led by renegade MI6 agent Alec Trevelyan. Operating as a ruthless enforcer and assassin for the organisation, her main characteristic is that she apparently can receive sexual satisfaction through killing. Her sadistic sexual proclivities, coupled with her overall lack of conscience as well as remorse for the deaths she causes, would seem to qualify her as a psychopath. She is proficient in martial arts, with a considerable degree of physical strength. She is a skillful aviator, able to commandeer a stolen EMP-hardened helicopter.

Xenia Onatopp is extremely callous, sadistic, cold-hearted, sexually psychopathic and villainously playful. She had an amicable relationship with Alec Trevelyan (possibly a romantic one) and the rest of her Janus associates. She has a rather twisted enjoyment for killing people with her strong legs. She is shown to derive sexual pleasure from killing people. Furthermore, she is shown to be bisexual.*