Wall Monsters
Inevitably found guarding the clue room of Level 1, Wall Monsters make their presence known once the Dungeoneer has picked up the food item on display, challenging them to a series of riddles. Correct answers result in the monster giving the players increasing amounts of useful information to guide them through the perils found further on in Level 1. In Series 2, they're also almost always responsible for giving the playing team the objective of their quest.
Although the Wall Monsters never manage to directly kill any team, failing to please them results in several bumbling onwards without their advice and meeting an inevitable demise.
- Berserk Button: For Olgarth and Granitas, being confused for each other. Granitas also dislikes it whenever people make fun of his name.
- Harmless Villain: They never manage to kill anyone, though this is enforced, as mentioned under Real Life Writes the Plot.
- Identical Stranger: Olgarth and Granitas look and sound almost identical, the only real difference being that Granitas is a slightly darker shade of grey than Olgarth. Averted with Igneous, who has a body made up from bricks and is voiced by a different actor.
- Real Life Writes the Plot: While they threatened to eat dungeoneers who failed to get even one question right, this was impossible to depict because of real-world technical limitations (it wouldn't be until Series 5 that this was feasible). Not that it really mattered for the most part, as only one team failed to get any questions right, and even then the production team just restarted their quest, as there wasn't another team to take their place.
- Trrrilling Rrrs: Igneous always speaks like this whenever he appears, notably whenever he says the word "Trrrruth".
Lillith
A sorceress found late in Level 1, Lillith resides in a chamber with a large chasm in the middle, and usually doesn't take kindly to the Dungoneer's presence. Pleasing her with one of the key items found in the Level 1 clue room is usually vital to pass through her chamber without taking a one-way trip to the bottom of the chasm. Her other noteworthy feat is that she's capable of preventing Treguard from assisting the team while they're in her chamber, as it's "her domain". In Series 2, she reprises her role and shares it with newcomer Mildread. Noticeably, one or the other will appear during the course of a team's quest, but never both.
- Berserk Button: She did not take kindly to being offered the wrong item, which invariably resulted in a one-way trip to the bottom of the chasm that lay below her lair.
- Hero Killer: Killed three different dungeoneers, making her one of the deadliest residents of the dungeon.
- Large Ham: While this is par for the course for a dungeon resident, she really turns it up a notch whenever she's offered an incorrect item. The empty jar of humbugs that she was offered late in Series 2 in particular rubbed her up the wrong way.
- The Smurfette Principle: The only female dungeon resident seen in Series 1. Series 2 would add another character (Mildread) played by the same actress, along with Gretel to serve as more of a protagonist-friendly character.
Folly
A jester appearing in Levels 1 or 2 to aid the team in a playful manner. His most notable moment came when he helped the second winning team through an otherwise hopeless situation in which they found themselves without any items in Level 2. After Series 2, his role is taken over by Motley.
Cedric, the Mad Monk
A dungeon guard almost always appearing at the start of Level 2, where he challenges the team to a series of riddles (much like the Wall Monsters) with the prospect of being given vital clues or spells if they can manage to answer correctly enough times. One two occasions the players manage to earn a brief escort from him, and on the first such occasion helps the first winning team through an encounter with Gumboil.
- Curb-Stomp Battle: Helps the first winning team get past Gumboil by giving the guard a beating, which he did so handily.
- Jerkass: Rained insults down on any Dungeoneer he encountered, and would sometimes even take away food if they did sufficiently poorly on his riddles. Oh, and he also killed a Dungeoneer in the infamous "Spade" incident, though the team was kinda asking for it.
- Hero Killer: Kills one of the later teams of Series 2 when they try to cast the "Spade", instead of the proper "Shovel" spell that they'd been given.
- Unusual Euphemism: Since this was a children's show, there were obviously limits on what insults he could use; "toad features" and "turtle-brain" were generally his favourite ones to use.
Gumboil
Another dungeon guard, usually found guarding Level 2 and requiring a bribe from the clue room to allow passage. He's noticeable for his general crudeness, from his bulbous warts to being often found drunk to his poor manner of speech.
- The Alcoholic: He appears drunk several times throughout the show, with both Cedric and Folly accusing him of being on the "Dungeon Juice".
- Butt-Monkey: Beaten up by Cedric, tricked by Folly, smacked with an anvil, appearing drunk. Gumboil has no luck at all in his various appearances. On one occasion he's magically thwarted twice in a row from the same team!
Gibbet
The third dungeon guard, seen only twice and only in Series 1. Both appearances mark him as a violent and aggressive man, which may be why his character was removed from the show so early on.
- Violent Glaswegian: Has a very noticeable Glasgow accent, and threatened to kill the third dungeoneer of series 1 just for waking him up with a "Lantern" spell (though the team ended up killing themselves by dispelling said spell).
Mug the Gargoyle
Appearing only in Level 3, Mug usually doesn't directly seek to harm the heroes, but his frequent bouts of depression are deadly to those around him. Cheering him up is usually a requirement to get by him safely.
- The Eeyore: Constantly complains about how ugly he is and how he doesn't have any friends, requiring the dungeoneers to cheer him up before they can proceed. Sometimes it's not even possible to do that, and the dungeoneers just have to get past him as quickly as possible.
Gretel
A rather dim maiden appearing on the first two Levels of the dungeon to help the team. She's occasionally seen paired off with her much older and fouler-looking fellow Series 2 newcomer Mildread. She doesn't appear again after Series 2, with Mellisandre largely taking over her role.
- Genki Girl: What she lacks in brightness, she makes up for in the sheer exuberance with which she seeks to help the players out.
- Damsel in Distress: The first-ever winning team had to save her from Mogdred's clutches in order to win their quest.
Bumptious
A dwarf miner appearing in Level 2. Teams usually manage to run afoul of him by mishandling his mining equipment or site, prompting Bumptious to go through a riddle sequence (usually pertaining to dwarf or ore-related manners) with them to prove themselves worthy.
- Fantastic Racism: A mild example; he was distrustful of any race other than his fellow dwarves, though could be won around either by doing him a favour or correctly answering riddles.
- Motor Mouth: Tends to talk very quickly, especially when rattling off the various regulations imposed by his guild.
- Obstructive Bureaucrat: He generally acts the part at first with his mining guild's regulations for mining sites and equipment, but mellows out on the "obstructive" part once the team manages to answer a few riddles.
- Our Dwarves Are All the Same: He's not short, but he's got the beard and the love of mining.
Mildread
A witch with the power to change her voice and appearance, Mildread occasionally tries to trick the team into climbing haplessly into her cooking pot. Mildread usually appears late in Level 1, and must be given the correct key item from the clue room on the same floor before she'll help the team through her room safely. She and Lillith usually play the same role in a team's quest, and thus they never both appear in the same one.
- Manipulative Bastard: Would often impersonate the voice of one of the advisors, or even Treguard himself in order to trick the dungeoneer into climbing into her cooking pot.
Olaf
A Scandinavian "tourist" appearing in Series 2 to replace Gibbet. He's usually found guarding Level 2, where he challenges teams with a choice of "Loot, Pillage, or Kill" - meaning he almost invariably needs to be bribed with the correct item before teams can get past him.
- The Ditz: Apparently, Olaf is so lacking in brains he can be bribed with just about anything. Indeed, only on two occasions (both in Series 2) did a team give him something that was actually valuable (a ruby in Team 4's case and a bar of gold in Team 11's case, the former though had to convince Olaf it was valuable). Most others gave him something more mundane or had to employ some form of trick (i.e. a "sorcerer's stone" that was invisible to stupid people) to get past him. Motley even lampshades this in one quest.
- Funny Foreigner: Encounters with him are usually on the silly side thanks to his broken manner of speech.
- Horny Vikings: His general appearance, right down to the horned helmet.
Owen the Dragon
A dragon appearing in Level 3, and usually one of the last characters encountered on a team's quest. In Series 2 he appears as a final threat that must be overcome, while in Series 3 he challenges the team to a final set of riddles to judge them worthy (or not) of receiving a crucial final bit of advice to seize victory.
- Took a Level in Kindness: In Series 2 he typically got very cranky when dungoneers encountered him, although this can be justified by his usually being annoyed at getting woken up by Mogdred. By contrast, he was much nicer in Series 3.
Motley
- The Bus Came Back: After being absent for Series 7, he returns at the start of Series 8, when the first dungeoneer of that series saves him from petrification.
- Casanova Wannabe: Frequently tried hitting on the female residents of the dungeon, to little avail.
- Suspiciously Similar Substitute: For Folly, with even Treguard lampshading how the only major difference between the two was that Motley didn't bother with facepaint.
Wall Spirits
- The Smurfette Principle: Brangwen was the only female among the wall-dwelling creatures in Series 1-3. She even lampshaded this by referring to herself as the "Brangwen-she."
- Suspiciously Similar Substitute: For the three wall monsters who appeared in the first two years of the show; they had a very different appearance to Olgarth, Granitas and Igneous, but fulfilled the same function.
Velda
- Action Girl: The first real example of such in the show's history, as the female characters in Series 1 and 2 had either been evil, or a Damsel in Distress and Spoiled Brat in Gretel's case.
- Fantastic Racism: Much like Bumptious she was instinctively distrustful of anyone not belonging to her native race (Elves), though could be won over if a dungeoneer helped her.
McGrew
- Involuntary Dance: Had this inflicted on him in his first appearance as a result of a spell cast by the team. Unfortunately, they didn't bother to show him mercy, which resulted in their death by spectral sword in the very next chamber.
- Man in a Kilt: Wore the traditional Scottish garb of a shirt, sash and kilt.
- Tempting Fate: Tried to challenge Mogdred to a fight, and was turned into a frog for his trouble. The dungeoneer subsequently managed to earn his trust by turning him back.
- Violent Glaswegian: At least, he tried to come across this way. In truth he was actually more of a blowhard, and never actually committed any acts of violence against a dungeoneer; contrast this with Gibbet, who actually did kill a dungeoneer for waking him up.
Mrs. Grimwold
- Eaten Alive: Implied.
Festus
- The Ghost: Festus was never seen on-screen, but his growls could be heard nearby wherever Mrs. Grimwold was.
Mr. Grimwold
Mellisandre
- Suspiciously Similar Substitute: For Gretel, in that she was a maiden who sometimes needed to be rescued as the goal of the quest. However, she was generally less of a ditz than Gretel was.
The Goblins
Knightmare's most recurring threats.- Hell Is That Noise: The distinctive noise of their horns. When you hear them, run!
Brother Mace
A monk who has taken a vow of insobriety.
- Fat Bastard: Could occasionally be this in Series 4, though more often than not he was polite and helpful.
- Forced Transformation: At Hordriss's urging, one of the Series 4 teams fed him a potion that turned him into a lizard (temporarily), to teach him a lesson about drinking to excess.
- Took a Level in Kindness: While he was never really that nasty to begin with, in Series 5 he shook off his less savoury aspects and fully aligned himself with the Powers that Be.
Gundrada
- Action Girl: Essentially took over this role from Velda, though other than that the characters didn't have a whole lot in common.
- Ax-Crazy: She was so eager to kick butt that she'd quite often threaten to attack a dungeoneer unless they persuaded her that they were friendly.
- Upper-Class Twit: Carried this trait because her lines tended to use well-to-do wordage and she constantly mispronounced her R's.
The Weeping Doors
- And I Must Scream: It's implied that the doors were humans at one point, who were transformed into mostly-animimate forms. Needless to say, their existence is not a happy one.
- Suspiciously Similar Substitute: For the wall-dwellers of the previous few seasons. They weren't actually able to devour people, though, so failing to answer any of their riddles would just render it impossible to proceed (not that it mattered, as no team got all three riddles wrong).
Oakley
Fatilla
Gwendoline
Elita
Sir Hugh de Witless
- Meaningful Name: Was dumb enough to try insulting Hordriss, thus getting himself cursed to always be compelled to rescue people.
- Unwanted Assistance: His entire schtick is saving people, whether or not they actually want to be rescued (because he's under a spell compelling him to do so). It's implied that he would have "rescued" dungeoneers by bringing them all the way back to Knightmare Castle (thereby ending their quest) if they didn't talk him out of it.
Pixel
Blockers
- I'm a Humanitarian: Would devour any dungeoneer who failed to provide the correct password. By now it was possible to depict this happening on-screen, so when one of the dungeoneers found themselves without the password, he quickly became the Blocker's snack.
Ah Wok
- Good Counterpart: To Julius Scaramonger; while Julius could occasionally sell useful items but was more likely to try ripping people off, Ah Wok was nothing but helpful to the dungeoneers.
- Yellow Face: Let's just say that it's very obvious that Mark Knight has no Asian ancestry, and leave it at that.
- You No Take Candle: His English was actually pretty fluent, but heavily accented. In one instance, this meant that he pronounced Hordriss's calling name ("Malefact") as "Marefact," meaning that the team had to work out what the correct pronunciation was.
Ridolfo
Captain Nemanor
- Anti-Villain: Didn't really like working for Lord Fear, but only did so due to not much liking the Powers that Be either, and Fear's work at least paying well.
- Heel–Face Turn: In the final episode of Series 6 he provided the dungeoneer with the item necessary to destroy Lord Fear's red dragon, which would otherwise have destroyed Castle Knightmare.
Rothberry
Fidjit
Grimaldine
Brother Strange
Stiletta
Snapper Jack
Honesty Bartram
- Meaningful Name: He's a trader whose name evokes "Barter".
