She is a fighter pilot and assassin who crushes her enemies with her thighs to get sexual satisfaction, working for the renegade MI6 agent Alec Trevelyan (Sean Bean).

She lures a Canadian admiral, Chuck Farrell (Billy J. Mitchell), onto a yacht moored off Monte Carlo and kills him during sex (honey trapping) by crushing his ribs with her thighs, achieving orgasm in the process.

Meanwhile, Trevelyan's henchman General Arkady Grigorovich Ourumov (Gottfried John) steals the dead admiral's NATO ID, granting him and Onatopp access to a prototype EMP-hardened Eurocopter Tiger aboard a French warship anchored off Monte Carlo.

The two indulge in aggressive foreplay where Onatopp attempts to crush Bond between her thighs, he finally draws his Walther PPK on her and demands to be taken to Janus.

In her final encounter with Bond in Cuba, she ambushes him and Severnaya programmer Natalya Simonova (Izabella Scorupco) by rappeling from a helicopter and again attempts to crush him between her legs.

Killing Onatopp is the only way for the player to dual-wield two different guns in the game without a complex series of button presses; she uses an RC-P90 and a grenade launcher at the same time.

Anna Katherine Amacker and Donna Ashley Moore suggest that Onatopp is a "direct throwback to the earlier style of Bond girl, complete with an innuendo-laden name and a blatant sexuality.

[4] Bassil-Morosow goes on to note that Onatopp "also sees violence as a broadly defined sexual act in which she gets to dominate and ultimately decide people's fates," and argues that she "poses a threat to Bond's status as a dominant male as she consistently outdoes him in all his favourite activities: driving, killing, risk-taking and having sex with multiple partners."

Bassil-Morosow concludes that "Onatopp's character, masculinised, independent, domineering and sexually liberated, can be read as a bitter parody of feminism.