Ghost (played by Anthony Wong) is the guns specialist of the Logos ship in the video game Enter the Matrix and the feature films The Matrix Reloaded and The Matrix Revolutions.
Ghost is described by the Wachowski brothers as an "ascetic Buddhist killer". A student of philosophy, he quotes and/or refers to Hume, William James, Nietzsche and especially Kierkegaard. Ghost's name may be a reference to the phrase "ghost in the machine", which describes the concept of mind-body dualism.
As seen in Enter The Matrix, Ghost and Trinity refer to each other as brother and sister, as they were unplugged from the Matrix on the same day. Ghost's romantic feelings for Trinity are unrequited, since she is in love with Neo, and is content with this path because Ghost did not want to be tied down by Trinity's expectations.
Ghost is known to be the best gunner in the fleet; he displays this skill of accuracy in Revolutions aboard the Mjolnir. He and Niobe share some of the same parts in Enter The Matrix, though they mostly have different sides to the story. It is also mentioned in the video game that Ghost is the most capable hand-to-hand combatant (excluding Neo, before his apparent death in Revolutions) currently participating in the war.
Ghost's latest appearance was in the MMORPG The Matrix Online. Due to copyright issues with Anthony Wong, Ghost is bald and has been completely shaven of all facial hair. Ghost, along with "the Twins", are the only recurring characters up-to-date to lack voice actors for the Matrix Online. Ghost was the first to encounter "Trinity" inside the Matrix after her death, although it was not made clear whether this Trinity was 'real' or a simulacrum.