Ballerina gives Keanu Reeves's iconic assassin a difficult choice; why doesn't he kill his target in the film's climax?

Like Wick before her, Eve is driven by a personal vendetta: the brutal murder of her father when she was still a child by highly trained and heavily armed assassins. Winston (Ian McShane) brings her to the Ruska Roma, where Eve excels at her training as a "Kikimora," serving as an assassin or a bodyguard, as the situation requires.