In the movie "Ballistic: Ecks vs Sever," the character Sever is a former government agent who has gone rogue and is now on the run from the authorities. She is portrayed by Lucy Liu and is the main antagonist of the film.

Sever is portrayed as a highly skilled and deadly assassin who has been tasked with stealing a dangerous biological weapon. Throughout the film, she engages in several high-octane action sequences and is shown to be a formidable opponent for the film's protagonist, Jeremiah Ecks (played by Antonio Banderas).

As the film progresses, it is revealed that Sever has a personal connection to Ecks and is motivated by a desire to uncover the truth behind her own past. This adds a layer of complexity to her character, as she is not simply a one-dimensional villain but has her own motivations and goals.

Lucy Liu's performance as Sever was praised by some critics, who noted her ability to bring intensity and depth to the character. Despite the film's negative reception, Sever has since become something of a cult favorite among fans of action cinema, with many citing her as one of the film's most memorable aspects.