- Artificial Human: In the John Hyams-directed films, thanks to gene therapy and cloning technologies.
- Back from the Dead: They're basically reanimated soldiers that have been killed in action.
- Bio-Augmentation: Pituitary and Thyroid Augmentations plus deep tissue electrical shocks to reheat a surgically repaired body on ice, along with implied bone, muscle and joint augmentations for added strength, durability and speed, along with other assorted goodies. Later kicked up a notch with gene therapy.
- Hand Cannon: The original film equipped them all with Desert Eagles.
- Hollywood Cyborg: With the exception of the headset and the blackbox, installed in the thighs of the UniSols, there really aren't many cybernetics in a UniSol's body. It's implied that there are additional bone and muscle augmentations for the UniSols, to add to their Made of Iron and Super Strength capabilities.
- Laser Sight: Their MP5's are armed with Imatronic LS45 laser sights.
- Monogender Monsters: Averted in the non-Canon movies, where there are female Unisols. Played Straight in the Canon movies. As to why there are no female UniSols, no one knows. It is a possibility, that the process of augmenting a female combatant would be much more time-consuming, as they would have to add more bone and muscle mass to make them as physically strong as their male counterparts without the muscle booster.
- More Dakka: The UniSol 2500's were equipped with OICW rifles.
Luc Deveraux/GR44 (Jean-Claude Van Damme)
- Awesome Anachronistic Apparel: In Day of Reckoning, he goes the route of Colonel Kurtz by wearing an M65 Field Jacket, along with matching pants and combat boots.
- Bond One-LinerYou're discharged, Sarge!This is not your lucky day.
- Dark Messiah: Becomes this in Day of Reckoning. He is seen as a messianic figure by the liberated UniSols, and has created a church-like compound deep in the swamps of Louisiana. They are seen as a separatist group by the US Government.
- Expy: Starts taking on Colonel Kurtz-esque traits, a la Heart of Darkness in Day of Reckoning.
- Face Death with Dignity: Admits his defeat against John and allows John to deliver the final blow.There is no end... Always another, John.
- The Hero: For most of the series, except Day of Reckoning.
- Kubrick Stare: Dons one in Day of Reckoning.COME HERE!
- One-Man Army: Becomes one at the climax of Regeneration. He manages to wipe out the company-sized force that the General brought with him to occupy Chernobyl, without much resistance, and does so with a combination of small arms fire, knife work, and lots of good ol' fashioned hand-to-hand combat.
- The Stoic: Shows almost no emotion at all in Regeneration and Day of Reckoning.
Andrew Scott/GR13 (Dolph Lundgren)
- Awesome Anachronistic Apparel: In Day of Reckoning, he runs around wearing clothing components from infantrymen in World War II, along with combat boots from the Vietnam War era.
- Badass Boast: His speech in Day of Reckoning.
- Bond One-LinerThat's the spirit, soldier!
- Cloning Blues: How he returns in Regeneration and Day of Reckoning.
- Creepy Souvenir: Wears a necklace of human ears at the start of the first film, and again later.
- Dynamic Entry: Starts off his fight with John by walking up to the latter from behind, and punching the man hard enough in the face to knock him clear on to his ass.
- Failsafe Failure: In Regeneration. The Doctor tries to attribute it to a failure in temperature regulation. It doesn't stop Scott from pulverizing his head with his bare hands.
- Large Ham: Once he regains his memories. His second clone keeps up the tradition in Day of Reckoning.
- More Dakka: Courtesy of his M60 in the first movie.
- Thirteen Is Unlucky: Even his serial number thinks he's bad news!
GR74 (Ralf Moeller)
GR55 (Tommy Lister)
John (Scott Adkins)
- Badass Normal: ...though as the plot progressed we learn that he's a UniSol.
- Berserk Button: If you mess with his non-existent family, then you're gonna have a hell to pay.
- Fingore: Loses his fingers to Magnus, who used an fireman's ax to chop his fingers off.
- It's Personal: Wants to take down Deveraux because he killed his family. Or so he thinks.
- Made of Iron: Survived many heavy impacts including being thrown through a wall of bedrock by another Unisol and having Devereaux almost cut his arm off with a sharpened machete. Granted, he's a cloned UniSol.
- One-Man Army: Becomes this after he is captured by the UniSol Army. He proceeds to wipe the floor with a lot of UniSols attempting to stop him, and takes down both Scott and Deveraux in the process.
NGU (Andrei Arlovski)
- Blade Below the Shoulder: Sports one. He uses it twice to kill two of the four UniSols sent after him, and attempted to use it against Deveraux. He did use it against Captain Burke, stabbing him hard after Burke made a feeble attempt to take him down.
- Impaled with Extreme Prejudice: It doesn't kill him though.
- More Dakka: Gets in on the action, with a heavily modified AK variant loaded with double-stack magazine, which he has no problem unloading a ridiculous amount of lead downrange in the process.
- One-Man Army: Capable of wiping out an entire security detail by himself, along with an incredible amount of Ukrainian Police, in an effort to kidnap the children of the Ukrainian Prime Minister. He later wipes out a company of soldiers by himself.
Magnus (Andrei Arlovski)
- An Axe to Grind: Attacks John with an axe while he's in a motel with Fantasia/Sarah. He ends up cutting off John's fingers during their scuffle, and John repays him by chopping off his foot.
- Cloning Blues: He is cloned from the NGU.
SETH/Super UniSol (Michael Jai White)
- Immortality: What he wishes to achieve.
- Literally Shattered Lives: Deveraux defeats him by freezing him, and then kicking him in the head, shattering his whole body.
- Nanotechnology: His body is enhanced using nanomachines.
- The Social DarwinistThe creator has become the created.
- Straw Hypocrite: Possibly an unintentional example; he declares in his speech that UniSols act without emotions, yet some of them smiled during said speech. Both Romeo and SETH themselves also emotes throughout the entire movie.
Romeo (Bill Goldberg)
- Bond One-LinerNext stop intensive care!
Col. Perry (Ed O'Ross)
- Eye Scream: Scott kills him by shooting him in the left eye.
Cpt. Kevin Burke (Mike Pyle)
- Badass Normal: He holds his own against the General's forces, although he doesn't fare as well against the NGU later on.
- Cloning Blues: Dr. Porter cloned him at the end of Regeneration as a middle finger to him; he had stated his intense dislike for the UniSols previously.
- Super Soldier: By the end of the film he becomes one.
- What Happened to the Mouse?: Not mentioned again in Day of Reckoning.
Gen. Coby (Corey Johnson)
Agent Gorman (Rus Blackwell)
- CIA Evil, FBI Good: Introduces himself as an FBI agent at the beginning of Day of Reckoning. Just a few minutes later (and spoiled by one of the movie's trailers), we learn he's actually working for the government, presumably the CIA.Put the plumber to work.
Cpt. Blackburn (Justin Lazard)
Sgt. Morrow (James R. Black)
- Black Dude Dies First: Averted. He was the third Ranger to be killed by the UniSols.]]
Gen. Radford (Daniel von Bargen)
Dr. Christopher Gregor (Jerry Orbach)
Dr. Sandra Fleming (Emily Joyce)
Dr. Richard Porter (Garry Cooper)
- Mad Scientist: He is rather amoral, viewing ordinary soldiers with disdain and highly praising the efficiency and deadliness of the NGU. As a middle finger to Burke, who had stated his intense dislike for the UniSols, he is cloned at the end of the movie and made into a UniSol.
Dr. Robert Colin (Kerry Shale)
- Mad Scientist: He stole the NGU from the US Government used the NGU as a gun-for-hire as well as equipping Topov's fledgling terrorist army with a nasty surprise in the form of Andrew Scott 2.0.
Miles (Kristopher Van Varenberg)
- Beleaguered Assistant: To both Dr. Colin and Dr. Su.
- Unexplained Recovery: Was killed by Scott in Regeneration, as we (and Deveraux) see his corpse. Somehow, he returns in Day of Reckoning.
Dr. Su (David Jensen)
Dr. Dylan Cotner (Xander Berkeley)
Squid (Brent Hinkley)
- Evilutionary Biologist: Sort of.A Super UniSol, with SETH's own thought matrix for a brain... The next level of evolution, man and computer... *yells excitedly* ...extinct with one stroke of the key!
- You Have Outlived Your Usefulness: Gets killed immediately after SETH tracks him down.
Col. Petrov (Aki Avni)
- Taking You with Me: Blows himself up to eliminate the NGU. Naturally, it doesn't work.
Gen. Boris (Aki Avni)
Veronica Roberts (Ally Walker)
Erin Young (Heidi Schanz)
- Expy: A brutally obvious replacement of Veronica.