Trinity, played by Carrie-Anne Moss in the films, is Neo’s love interest and a major character throughout the trilogy. Like the series’ other main characters, Trinity is a computer programmer and a hacker who has escaped from the Matrix, a sophisticated computer program in which most of the human race is imprisoned. Though few specifics are revealed about her previous life inside the Matrix, we are told that she cracked a database so secure that she is famous amongst hackers, and that Morpheus, one of a number of real-world hovercraft commanders, initially identified her and helped her escape from the program. At the beginning of the series, she is first mate on Morpheus’ Nebuchadnezzar and serves mainly as a go-between for him and the individuals he wishes to free from the Matrix. As the series progresses, her primary importance as a character becomes her close relationship with Neo. Throughout the entire Matrix Trilogy series, Trinity’s Matrix-given name is never revealed.
Trinity is first introduced at the beginning of The Matrix, in a phone conversation with Cypher, which is heard offscreen. This cuts to a dingy hotel room chase scene between Trinity and a group of police officers and Agents, a series of programs that police the Matrix against rebels. Trinity is next seen communicating with Neo for Morpheus in several encounters. Eventually, she and the rest of the Nebuchadnezzar’s crew unplug Neo from the Matrix and begin his training as a new recruit in the war against the machines. She participates in several missions into the Matrix, including taking Neo to The Oracle, a computer program inside the Matrix who is said by the rebels to have supernatural powers. Throughout the film, it is apparent that Trinity has been in love with Neo from afar for some time, and tries to hide her feelings for him. Near the end of the film, after he is killed by Agent Smith in the Matrix, she speaks to his still plugged-in body and reveals that the Oracle told her that she would fall in love with the One, a prophesied individual capable of manipulating the Matrix to an unprecedented degree. She kisses him, whereupon he is revived. Neo defeats the Agents and the film ends. This marks the beginning of a romantic relationship between Neo and Trinity which proves decisive in the outcome of the series.
Trinity’s importance as an individual character in the first sequel to The Matrix is fairly minimal for the first half of the film, though she appears in almost every scene. She aids in the rescue of the Keymaker from the Merovingian and in the subsequent escape, but her real role in the plot does not come into play until the climax of the story, where Neo is forced to choose between saving Trinity and saving Zion, the underground city where the last humans not living in the Matrix reside. Neo chooses to save Trinity and revives her after she is shot by an Agent. In the final installment of the Matrix series, Trinity is involved in the rescue of Neo from a cut-off segment of the Matrix, where he is being held by a program in the employ of the Merovingian. In the real world, Trinity goes with Neo to the Machine City in an attempt to negotiate with the Machines. While attempting to evade Machine pursuers, their hovercraft crashes, so that Trinity is fatally wounded and dies in Neo’s arms. After Trinity’s death, Neo gives his life to defeat Smith and negotiate a truce with the Machines.