Enemies of the Ka-Tet

John Farson

Farson ("The Good Man") was a bandit who attacked coaches in the Barony of Garland and Desoy. Prior to the events of Wizard and Glass, he began amassing an army and a weapons stockpile, with the intention of eventually installing himself as ruler of Mid-World. Two years after the events of Wizard and Glass, Roland tells the ka-tet, Farson succeeded.
Farson supplied his men with many weapons — including tanks, lasers, flamethrowers, bazookas, and robots — from the days of the Great Old Ones. After the destruction of Gilead, the battle between the gunslingers and Farson eventually reaches Jericho Hill. The remaining gunslingers, other than Roland, fall at that battle, and Mid-World is lost.
John is best displayed on the cover of Dark Tower: Treachery 5, shown as a tall, slim man with short dark hair, dressed all in black 'armor', holding his gruesome mask.

Jack Mort

Jack Mort (whose name means "Death" in French) is a fictional character who makes a brief appearance in The Gunslinger, and a more detailed appearance in The Drawing of the Three. The third door that Roland encounters on the beach leads to Mort and New York in the mid-1970s. Roland finds himself inside the mind of "The Pusher", a sociopath named Jack Mort, whose sadistic acts of random violence have shaped the lives of Roland's companions. Mort, an accountant, thrives on being a meticulous planner when it comes to murder. This, and his style of execution, leads him to be an anonymous and therefore very effective killer. For example, Mort will drop bricks (and presumably other heavy items) on people's heads from tall places (what he calls "depth charging"), will push people in front of cars, and will also push people in front of subway trains. His methods allow a complete lack of direct confrontation, and thus allow him to continue his secret life quietly and with deadly effectiveness. He acts as a linking point between Susannah (both Odetta and Detta), Jake, and ultimately Roland. When Odetta was five, Mort dropped a brick on her head (which led to the emergence of her multiple personalities); he also pushed Odetta in front of a subway car when she was a teenager (neither knowing nor caring that she was a previous victim of his cruelty). On the day Roland enters him, he is planning to shove a young boy (who turns out to be Jake Chambers) into traffic. Unwilling to let Jake die once again through his inaction, Roland takes control of Mort's body and stops him. This death was the means that forced Jake into Roland's world the first time; when Roland prevented it, it had caused a time paradox, though it was resolved later, or rather, undermined, when Jake entered into Roland's world again, but through a door. Later, Roland purposefully forces Jack Mort to throw himself burning in front of a subway train, while telling him that he deserves a far worse fate. In the midst of this struggle, Roland manages to trick Detta into looking through the door, which forces both Odetta and Detta to acknowledge their dual personalities and the cause of them. Mort is described as tall, thin, and having blonde hair in The Drawing of the Three, yet is said by Roland to have had dark hair when mentioned in The Waste Lands.

Blaine the Mono

Blaine the Mono is a demented monorail train appearing in The Waste Lands and Wizard and Glass. Roland and his ka-tet have to ride this psychopathic train in order to travel safely in the Wastelands. The train seems to be connected to the children's book found by Jake, Charlie the Choo-Choo. Before Blaine lets Roland and his ka-tet on board, he kills every single living thing in the city of Lud with poison gas. Blaine reveals to the ka-tet that he plans to destroy himself along with the ka-tet, he promises to let them live on one condition, the ka-tet must beat him in a riddling contest. If he cannot answer one riddle they ask him, he will not destroy himself with the ka-tet on board. It becomes clear that Blaine has a huge library of riddles from many different levels of the tower at his disposal, and programs to decipher the riddle's wordplays or hidden clues, so the game seems doomed. Eddie eventually stumps Blaine with unsolvable and exceedingly stupid jokes humans sometimes make. This forces Blaine to try to "lower" his intelligence to levels necessary to answer, which ends up driving him completely insane and causes his computer to crash. Eddie then proceeds to shoot Blaine's main computer, which causes the train to crash, killing Blaine.

Shardik

Shardik is a character encountered by Roland and his ka-tet in the novel The Waste Lands.
Shardik, while appearing to be a massive bear, is actually a mechanical construct of North Central Positronics. A cyborg, Shardik was built by North Central Positronics to serve as one of the twelve Guardians of the Beams. At the time that he is encountered by Roland, he is several thousand years old and dying and infested with parasites (a reference to Richard Adams's novel Shardik). Driven insane by his illness, he attacks Roland and his ka-tet, and they are forced to kill him.
The Guardians of the Beams keep watch over either end of the six beams that support The Dark Tower. Of the twelve Guardians the ones that are mentioned are Turtle, Bear, Fish, Wolf, Elephant, Rat, Bat, Lion, Horse, and Eagle; Maturin, the Turtle (also a character in It), is considered the most powerful, or significant, of these. By the time Roland was growing up, the Guardians had reached a near-mythic status, and he wasn't sure whether they even existed before running into Shardik.
The original Guardians, like so many other elements of Roland's world, may have been magic entities that were replaced by North Central Positronic's technological constructs. The death of Shardik represents another failure of technology and is one more step in the dismantling of not only Roland's world, but the entire multiverse of existence.
Shardik is also a novel by Richard Adams; King took the name from this book, something some members of Roland's ka-tet recognize: Susannah realizes the source of the name (although the book was published a decade after the year she was drawn from), while Eddie mentions that he thinks of rabbits when he hears the name Shardik—a reference to Watership Down, another of Adams' books. Adams' Shardik, like King's, is a giant bear.

Rhea

A decrepit old witch, Rhea Dubativo was the one responsible for the death of Roland's true love, Susan Delgado. She was entrusted with the pink Wizard's Glass (known as Merlin's Grapefruit), which slowly drained her and drove her insane, similar to the deterioration of Gollum from The Lord of the Rings. Readers never find out what happens to her; although Roland implies that he killed her, nothing more is elaborated upon beyond that.

Eldred Jonas

The main antagonist of Wizard and Glass, Eldred is a failed gunslinger now in service to the Crimson King. He leads a gang called the Big Coffin Hunters. Eldred, though in charge of the Red's operations in Mejis, is answerable to George Latigo (one of John Farson's chief lieutenants) and Randall Flagg (at this time known as Walter), Farson's personal wizard.

Roy Depape

Arguably the shortest-tempered of the Big Coffin Hunters, Roy Depape's hot-headedness is one of the major catalysts for events in Wizard and Glass; through threatening Sheemie Ruiz following a mishap in the local tavern, Roy sets off a multi-layered Mexican standoff between Roland's original ka-tet and the Big Coffin Hunters. Though the situation is initially resolved with diplomacy, the event reveals to Jonas the true nature of Roland and his friends (who were hiding incognito in Mejis under aliases) and blows their cover. When the Big Coffin Hunters frame the young Gunslingers for murder he kills mayor Hart Thorin and plants the rook's skull that ties Cuthbert and by extension Roland and Alain to the crime. He was killed by Roland when the three young gunslingers attacked Eldred and his hundred men, who were riding to meet George Latigo.

Clay Reynolds

Clay Reynolds is Eldred Jonas' right-hand man and the quietest of the Big Coffin Hunters. He is described as red-haired and especially handsome, and has a reputation as a ladies' man. His most notable accessory (besides his pistol) is a long red cloak. When the Hunters are framing Roland and his friends he volunteers to kill Kimba Rimer with a long dagger he bought for the occasion, in revenge for a comment Rimer made about his cloak. During the ensuing confusion that transpires near the end of The Dark Tower IV: Wizard and Glass, Clay escapes from Mejis with Coral Thorin, and the two become a bandit couple. It is interesting to note that King first cites Reynolds as having red hair, then changes it to dark (brown/black), then references Depape as being "be-spectacled and red-haired" several times. Roland mentions that both Reynolds and Coral Thorin were killed in a failed robbery several years after the events of Mejis. In the comic series The Long Road Home, Reynolds is seen leading a possee of Mejis citizens in pursuit of Roland's Ka-tet, which they break off when Cuthbert Allgood cuts a rope bridge over a wild river. In the one shot issue The Sorcerer, Reynolds is seen being whipped by John Farson for losing Maerlyn's Grapefruit while Coral Thorin waits outside Farson's tent.

Coral Thorin

Coral is the traitorous sister of Mejis' mayor, Hart Thorin. Mature and slender, she catches the eye of both Eldred Jonas and Clay Reynolds. Crafty and intelligent, Coral is able to ascertain that Jonas is indeed working for John Farson and, not wanting to be on the losing side, conspires with and aids Jonas in his dealing in Mejis. The two enter into a sexual relationship, but following Jonas' death Coral becomes the lover and cohort of Clay Reynolds.

Cordelia Delgado

Cordelia Delgado was Susan Delgado's aunt, who sold her to Mayor Thorin as a "gilly". She has no problem selling Susan for money, which seems quite odd. Cordelia has a short temper and has fits where she becomes enraged and screams at Susan. When Cordelia learns that Susan has lost her virginity to Roland and not Hart Thorin, she becomes enraged and slowly loses her mind. Towards the end of the book, she has gone completely insane and joins Rhea in killing Susan. Cordelia is the first person to light the pile that sets Susan on fire, Rhea is second. Shortly after killing Susan Delgado, Cordelia has a stroke and dies.

Mia

An invading spirit who possesses Susannah Dean's body in Wolves of the Calla. Originally an immortal spirit similar to a succubus, she saw and fell in love with a baby and longed to have one of her own (an unknown force kept her from coming too close to the child she loved and taking it for herself). Long after a plague ravaged the town of Fedic and the child was taken away, Mia struck a bargain with Walter/Flagg. If she would give up her formless immortality, Walter would give her a baby. Mia's purpose in Walter's and the Crimson King's plan is to bear Roland's child; prophecy has foretold that this child will be Roland's doom.
Mia called the child her "chap", and it was carried by both Susannah and Mia. Susannah had become pregnant with Roland's seed from the demon she copulated with in The Waste Lands, during Jake's Drawing. The demon, a hermaphrodite able to change its sex, had copulated previously with Roland as a female in The Gunslinger while Roland protected Jake and queried it for information. The demon had somehow preserved Roland's semen (and allowed it to be somehow mixed with that of the Crimson King's seed) and impregnated Susannah with it while male. Mia possessed Susannah in order to take over the birthing of her "chap".
Mia is killed and eaten by her child, Mordred, shortly after giving birth.

Mordred Deschain

Son of two fathers and two mothers, Mordred was born of Susannah's egg fertilized by the seed of both Roland of Gilead and the Crimson King, and carried to term by Mia. Mordred is half-human, half-spider, able to transform between the two, and if his fate is fulfilled, he will both kill Roland and topple the Dark Tower itself. He is both very powerful and extremely arrogant. Growing at a rapid speed, Mordred passes from childhood through adolescence in a matter of months. His abilities include the ability to change between human form and spider form at will and absorbing a victim's knowledge and experience by devouring them. Neither the seers nor fate itself could protect Mordred from the death of magic in Mid-World as the Tower falters. Mordred becomes deathly ill after eating poisoned horse meat, and when he makes a final attempt to kill Roland, he is attacked by Oy. Oy is able to distract Mordred long enough to allow Roland to wake up and kill his son, at the threshold of the Dark Tower.

Richard Patrick Sayre

The leader of the can-toi and the head of the Sombra Corporation, Sayre is the individual who lured Callahan to his death in 1983. He is the one who witnesses Mordred's birth in the Extraction Room at the Arc 16 Experimental Station in Fedic, and he meets his end when he is shot twice in the back of the head (once for Mia, once for Pere Callahan) by Susannah. Like several other characters, his name is 19 letters long. He, like all low men, has a large red dot on his forehead that resembles an open wound. His usual attire was a black shirt with black pants, a yellow sport coat, and blood-red tie. He was killed while drawing his pistol by Susannah Dean when she tried to escape after Mordred devoured Mia.

Finli O'Tego

Finli o'Tego is a Taheen that appeared in the fifth and seventh Dark Tower books; he was referred to briefly in Wolves of the Calla, before reemerging as a fully fleshed out character in The Dark Tower.
Finli is an assistant and close friend to Pimli Prentiss and helped in the running of Devar-Toi. Like most Taheen, he has psychic abilities; he also enjoys eating pus. He is credited with orchestrating the re-capture of Ted Brautigan, an event described in Hearts in Atlantis. During the siege of Algul Siento by Roland's ka-tet, Finli was mortally injured and ultimately put out of his misery by Eddie Dean.

Enrico Balazar

Enrico Balazar is a New York criminal kingpin first introduced in The Drawing of the Three. He manages a club called "The Leaning Tower" and has a fascination with building houses of cards on his desk. Among his actions in the series are: kidnapping Eddie Dean's older brother, Henry (who in turn overdoses on heroin before he can be saved), running over Jake with his car and killing him for the first time, and hiring out his musclemen to the Sombra Corporation. Enrico is killed by Eddie and Roland in Dark Tower II, but a parallel-earth version of him is alive and mentioned in books VI and VII.

Jack Andolini

Jack Andolini is a New York gangster and affiliate of Enrico Balazar, whom readers first met in The Drawing of the Three . In that novel, he followed Eddie and Roland from Earth to Mid-World (via magic door) and was promptly eaten alive by lobstrosities (after suffering major wounds to his face and arm during gunplay with Roland). He reappears, first in Wolves of the Calla and later in Song of Susannah as a representative of the Sombra Corporation, in a parallel-earth, 1977. When Roland and Eddie enter the Maine of 1977, Andolini and his gang ambush them at the East Stoneham General Store. This version of Andolini meets a less horrible fate: he is imprisoned in a Maine county jail.

Dandelo

Dandelo is a psychic vampire who feeds on emotions. He makes an appearance in Book VII: The Dark Tower. Using the name of 'Joe Collins', he lures Roland and Susannah into his cottage on Odd Lane (the street that crosses Tower Road in the White Lands of Empathica, and an anagram of "Dandelo") and treats them to a feast. Afterward, he tells them that before entering All-World, he was a stand-up comedian. Roland asks to hear some of his act, during which Dandelo comes close to making Roland laugh to death. Susannah avoids entrapment because she is in the bathroom at the time, tending to a troublesome sore on her face. There she discovers a note apparently left by Stephen King himself (the note even acknowledges itself as a deus ex machina) that helps her puzzle out Joe's true identity. Before he can sap all of Roland's life force, Dandelo is killed by Susannah with two shots to the head.
It is later revealed that he had kept Patrick Danville captive as a 'food source' to drain of emotions; at one point Dandelo ripped out Danville's tongue, preventing him from speaking.

Lippy

Dandelo had a stable behind his house, in which he kept a horse named Lippy. Lippy whinnied when she saw Roland, Susannah and Oy approach. She was very old, ragged, and had holes in her coat. When Dandelo is slain by the gunslingers, Lippy flees her stable, but returns to seek shelter from a winter storm—only to be shot down by Roland. After the gunslingers have moved on, Mordred Deschain, starving after weathering the storm out in the wilderness, fed on Lippy's corpse, which poisoned him and eventually contributed to his downfall.

Tick-Tock Man

The Tick-Tock Man (real name Andrew Quick) is the leader of the Grays of Lud.
He is the great-grandson of David Quick. His left eye was punctured by Oy during a fight, and Jake shot him in the leg, and then in the head with a .22 pistol. He was left for dead, but survived, the bullet having only grazed his skull and torn off a flap of skin. Randall Flagg rescues him and takes him to the Emerald Palace, where he attacks Roland's ka-tet, and is shot and killed by Eddie and Susannah. He seems to be a successor to the Trashcan Man from The Stand, as both were followers of Flagg who repeated the mantra "My life for you" in regard to their loyalty to him.

Andy the Messenger Robot (Many Other Functions)

Andy was one of the main antagonists in Wolves of the Calla. Andy was created by Lamerk Industries(the same company that made the Twelve Guardians) and had lived in the Calla for thousands of years. He was obsessed with telling people their horoscopes, like Blaine the Mono was obsessed with riddles. Andy played music from a speaker in his chest and was loved by all the children in the Calla. Andy sent information about the Calla and the whereabouts of the children of the Calla to Finli O'Tego. The information was used so that the Wolves, who were really robots disguised as monsters, could locate the children and take them into the Thunderclap. Andy's evil side was discovered by Jake, who hid in an ancient control center and overheard Andy talking to Ben Slightman Sr. about the Wolves. Andy claimed he didn't know much about the Wolves (under Directive Nineteen), but he always told the townsfolk when they were coming a month in advance. Andy was finally put to rest by Eddie, who blinded him by shooting his eyes out and then ordering him to shut down under Directive Twenty. Andy was then buried underneath a pile of manure in an outhouse.

Pimli Prentiss

Pimli Prentiss is the warden of Algul Siento. He is described as being tall, overweight, and balding. Pimli Prentiss (born "Paul Prentiss"; he adopted the taheen name Pimli during his induction ceremony) was recruited by the Crimson King to run Algul Siento, the Crimson King's prison for Breakers. He got the job by replying to a help wanted advertisement in a daily newspaper. Pimli was not a resident of the planet that Algul Siento existed on, but a parallel Earth very similar to our own, where he worked as a prison guard.
Pimli is shown to be cautious and restrained in his approach to his service to the Crimson King. He relies on his humanity and spirituality to guide him in his endeavors. He is portrayed as being a newly devout Catholic. This devotion to Catholicism is apparently triggered by his experiences in End-World.
Pimli was killed by Roland Deschain's ka-tet during the raid on Algul Siento. Before dying, he was able to inflict a mortal gunshot wound on Eddie Dean, thus breaking Roland's ka-tet.