Avatar name: Mirror Universe Kirk
Rank: Captain
James T. Krik (William Shatner) at I.S.S. Enterprise
First Appearance: "Mirror, Mirror"
Evil captain of the parallel universe's Enterprise. A transporter accident caused Kirk, Scotty, McCoy and Uhura to switch universes.


Avatar name: Mirror Universe Spock
Rank: Commander
Spock (Lenoard Nimoy) at I.S.S. Enterprise
First Appearance: "Mirror, Mirror"
Kirk's first officer. Attempted to kill Kirk when the transporter accident switched his ruthless captain for the positive universe's more rational Kirk.


Avatar name: Mirror Universe Sulu
Rank: Lieutenant
Hikaru Sulu (George Takei) at I.S.S. Enterprise
First Appearance: "Mirror, Mirror"
Navigator aboard the parallel universe's Enterprise. Attempted to seduce the positive universe's Uhura.


Avatar name: Mirror Universe Uhura
Rank: Lieutenant
Nyota Uhura (Nichelle Nichols) at I.S.S. Enterprise
First Appearance: "Mirror, Mirror"
Communications officer aboard the parallel universe's Enterprise. A transporter accident caused her, Kirk, Scotty and McCoy to switch places with their counterparts in another universe.


Avatar name: Mirror Universe Sisko
Rank: Captain
Benjamin Sisko (Avery Brooks) at the Morgue
First Appearance: "Crossover"
Smuggler turned Terran patriot. He was a smuggler for Intendant Kira before Kira and Bashir visited the parallel universe and he helped save their lives. He starts a rebellion against the Alliance, but is killed later. Sisko is kidnapped to pose as his counterpart once.


Avatar name: Mirror Universe Kira
Rank: Intendant
Kira Nerys (Nana Visitor) at Terok Nor
First Appearance: "Crossover"
She served the Klingon/Cardassian alliance as the Intendant of the Terak Nor station. During her encounters with personnel from the Starfleet universe, she displayed a ruthlessness not shared by her counterpart from our universe.


Avatar name: Mirror Universe Bashir
Rank: Rebel
Julian Bashir (Alexander Siddig) at U.S.S. Defiant
First Appearance: "Through the Looking Glass"
Member of the Terran Rebellion. Not very fond of Sisko.


Avatar name: Mirror Universe Jadzia
Rank: Rebel
Jadzia Dax (Terry Ferrell) at U.S.S. Defiant
First Appearance: "Crossover"
Member of the Terran Rebellion. Formerly Sisko's mistress.


Avatar name: Mirror Universe Ezri
Rank: Rebel
Ezri Dax (Nicole DeBoer) at Terok Nor
First Appearance: "The Emperor's New Cloak"
Helps the positive universe Quark and Rom rescue their Grand Negus, who has been captured by the Alliance.


Avatar name: Mirror Universe O'Brien
Rank: Engineer
Miles O'Brien (Colm Meaney) at U.S.S. Defiant
First Appearance: "Crossover"
Helped the positive universe Kira and Bashir escape from Terok Nor. Later kidnapped Sisko so he could pose as the mirror universe Sisko. Helped build a copy of the Defiant.


Avatar name: Mirror Universe Odo
Rank: Constable
Odo (Rene Auberjonois) at Terok Nor
First Appearance: "Crossover"
Enforcer on Terok Nor for the Alliance. Killed by Doctor Julian Bashir during an escape attempt.


Avatar name: Mirror Universe Worf
Rank: Regant
Worf (Michael Dorn) at the flagship
First Appearance: "


Avatar name: Mirror Universe Garak
Rank: Alliance Member
Elim Garak (Andrew J. Robinson) at the morgue
First Appearance: "Crossover"
Garak was first officer of the alternate Terok Nor in 2370. In 2371, the mirror Garak tortured and killed the mirror Rom after the Ferengi revealed a Terran rebellion plan to get the mirror Jennifer Sisko away from Terok Nor. He was later killed by the Regent.


Avatar name: Mirror Universe Bareil
Rank: Thief
Bareil Adonis (Phillip Anglim) at Bajor
First Appearance: "Reserrection"
Was sent from the alternate universe to the positive universe by the Intendant to steal the Orb of Prophecy and Change.


Avatar name: Jennifer Sisko
Rank: Civilian
Jennifer Sisko (Felicia M. Bell) at the morgue
First Appearance: "Through the Looking Glass"
Terran scienist married to Sisko, the leader of the Terran Rebellion. The positive universe Sisko was kidnapped after the alternate universe Sisko was killed so they could rescue Jennifer. Later she was killed protecting Jake Sisko from the Indenant.


Avatar name: Mirror Universe Vic Fontaine
Rank: Rebel
Vic Fontaine (James Darren) at Terok Nor
First Appearance: "The Emporor's New Cloak"
Helped Quark, Rom and the alternate Ezri escape form the Terran rebels so they could rescue the Grand Negus.


Avatar name: Mirror Universe Tuvok
Rank: Rebel
Tuvok (Tim Russ) at Terok Nor
First Appearance: "Through the Looking Glass"
Member of the Terran Rebellion.


Avatar name: Chaotica
Rank: Meglomaniac
Chaotica (Martin Rayner) at the holodeck
First Appearance: "Night" The villain in Tom Paris' holodeck program "The Adventures of Captain Proton," which was based on early 20th-century entertainment and represented that era's view of the future. In the serialized storyline, Chaotica was a megalomaniacal alien dictator determined to conquer Earth and enslave the human race in the Mines of Mercury.


Avatar name: Queen Arachnia
Rank: Queen
Arachnia (Kathryn Janeway) at the holodeck
First Appearance: "Bride of Chaotica!"
Captain Janeway portrayed Arachnia to help defeat Chaotica.


Avatar name: Captain Proton (1)
Rank: Captain
Proton (Tom Paris) at the holodeck
First Appearance: "Night"
Fictional hero of a holodeck program created by Tom Paris. "The Adventures of Captain Proton" is based on old Earth film serials from the 1930s.


Avatar name: Captain Proton (2)
Rank: Captain
Proton (Tom Paris) at the holodeck
First Appearance: "Night"
See above.


Avatar name: Proton's Sidekick (1)
Rank: Sidekick
Buster Kincaid (Harry Kim) at the holodeck
First Appearance: "Night"
Ace reporter and trusty sidekick to Captain Proton in Tom Paris's futuristic holodeck serial-adventure.


Avatar name: Proton's Sidekick (2)
Rank: Sidekick
Buster Kincaid (Harry Kim) at the holodeck
First Appearance: "Night"
See above.


Avatar name: "Chaotica" Doctor
Rank: Hologram
Doctor (Robert Picardo) at the holodeck
First Appearance: "Night"
The Doctor in Tom's holodeck program.


Avatar name: Chaotica Robot
Rank: Servent
Satan's Robot (Tarik Ergin) at the holodeck
First Appearance: "Bride of Chaotica!"
Robot working for Chaotica.