Unnamed mirror universe inhabitants
List of unnamed mirror universe inhabitants.

Alien scientist  
This so-called "unknown alien scientist" was the inventor of the Tantalus field. 

According to , "I always thought that was funny, the great, powerful Captain  who owes everything to some unknown alien scientist and a plundered laboratory." James T. Kirk justified his (counterpart's) actions, by beginning to state that "Well, if you don't take advantage of your opportunities…" before Moreau finished, "…you don't rise to the command of a starship or even higher." Kirk later used it in his rise to power by killing his many enemies. ()

Alien slave  

This alien slave worked for the Tholians aboard the Federation starship  under the Gorn slave master Slar in 2155. 

When that ship was stolen from a Tholian dock and commandeered by , an unknown reptilian creature attacked and killed , one of Archer's officers. The alien slave worker was interrogated in the Defiants briefing room as to the identity of the murderer. Eventually, he revealed that the killer was his slave master, Slar. ()

Bajoran musician  

This Bajoran musician played on a woodwind instrument aboard  in 2370.

When Intendant  entered , he asked her what he should play for her. ()

Dabo girl 

This dabo girl ran the dabo table in 2370 when Major Kira Nerys visited . ()

Lisea's killer 
According to , this drunken Cardassian was responsible for killing his lover, Lisea, with a disruptor, after a bar fight broke out where the two were eating. ()

Personnel lists 
 Klingon-Cardassian Alliance personnel
 Regent's flagship personnel
 MACO personnel
 Starfleet personnel
 ISS Avenger
 ISS Enterprise NX-01
 ISS Enterprise (NCC-1701)
 
 Vega IX inhabitants

Tellarite rebel 

A female Tellarite member of the Terran Empire rebellion was present on the planet Harlak in 2256. ()

Terrans

Tholian pilot  

When the  crew was attempting to commandeer the Tholian-held , they destroyed a Tholian vessel and captured the pilot, beaming it into the ship's decon chamber.  proceeded to torture the Tholian by lowering the temperature in the chamber until it gave them the location of the Defiant. When the Tholian later attempted to send a signal to its people, Phlox killed it by lowering the temperature until its carapace shattered. ()

Vulcan rebels  
These two Vulcan rebels from the mirror universe welcomed Bashir, Smiley, Ezri Tigan, and the Ferengi Quark, Rom, and Zek back aboard  in 2375. ()

Vulcan servants  
These Vulcan servants served for Intendant  on the station  in the mirror universe in 2370 and 2371.

The first two helped her out of the bath tub and dressed her in a gown. Later, they accompanied her to the party in . ()

The latter two were present when the intendant told  about the death of her . ()

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Unnamed individuals
Unnamed Bajorans
Unnamed Tellarites
 Mirror universe
Unnamed Vulcans
Unnamed² species