His utter slaughter of a squad of six turian soldiers in 'Retribution' using nothing but a pistol and a knife is probably the best example.Contractual Boss Immunity: He's immune to Stasis, even when other enemies would be affected.In the original concept for the Thessia boss fight, Kai Leng would have planted explosives throughout the temple before Shepard got there, instead of relying on a gunship to back him up.He starts developing a flair for Awesome, but Impractical after his indoctrination. The pragmatism is more evident in Retribution, where he generally behaves like a real assassin: Altering his appearance for a job where the risk of him being recognized is too great, and his personal preference for either poisoning Grayson or sniping him from afar.Combat Pragmatist: He's more than happy to call in reinforcements to help him or even have a gunship cover him while he 'recharges'.Climax Boss: He's the game's final proper boss.

Canon Immigrant: First appeared in the Retribution and Deception novels.

But Not Too Foreign: According to the novels, he has both Chinese and Russian/Slavic heritage, with the Chinese being the dominant of the two.

If true, then it doesn't seem to have changed his personality much.

Brainwashed and Crazy: It's implied on Thessia that he's indoctrinated.

Braggart Boss: With the sole exception that his actions and behavior aren't played for laughs, he fits this almost exactly, right down to the fancy flashy outfit.

Boxed Crook: The Illusive Man recruited him when he was imprisoned for the aforementioned incident with the krogan.

Mechanically he's the opposite of an Elite Mook a Cerberus Phantom but not as good.

Shepard actually calls him out on this in their last fight. Boisterous Weakling: He keeps acting like he's an unstoppable badass right up until the end, even though he's comprehensively lost every fight he's been in and only survived by running away after a save by allies.When faced with an opponent he can't just steamroll, he ends up calling in backup to cover his retreat. Despite the above quote, however, it quickly becomes apparent that he can't handle any situation where he doesn't have the advantage.Hints of social darwinism aside, he just loves violence, and relishes the idea of going up against Shepard. Blood Knight: He enlisted in the army at 16 using a false ID, only to be discharged for murdering a krogan the same year he was made N7.Blood from the Mouth: Happens when he's finally killed by Shepard.Averted in the game proper, where he's been augmented with Reaper tech, and it's still not badass enough to beat Shepard. Then, in Deception, manages to kill Гјber-biotic Gillian Grayson with a shiv while injured. And then 6 turians, again with just a knife. Badass Normal: No biotics, no cybernetics, and still manages to kill a krogan (who, remember, have redundant organ systems and an innate Desperation Attack) in a Bar Brawl with just a knife.Badass Baritone: Courtesy of Troy Baker.Backstab Backfire: How his boss fight ultimately ends.Arrogant Kung-Fu Guy: They don't get much more arrogant than Kai Leng.Certainly not the level of threat as the Reapers, Saren before, or his boss The Illusive Man for his influence. In reality, while Shepard despises him, s/he sees him as more of a cowardly roadblock and attack dog. Arch-Enemy: He considers himself to be Shepard's.His backstory is alluded to if you dig, but not in much detail. All There in the Manual: Most of his background is covered in the books, where playing just the game you would think he's just another baddie.He returns as part of the force that the Illusive Man sends against Shepard in the third game. A Cerberus assassin who had a run in with David Anderson during the events of Retribution and Deception.

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