http://static.tvtropes.org/pmwiki/pub/images/merlin-merlin-on-bbc-2683111-800-600_5829.jpg
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The main character page for the series is [[Characters/{{Merlin}} here]]. For characters of the main cast, go [[Characters/MerlinMainCast here]].

[[foldercontrol]]

[[folder:Characters Introduced in Season 1]]

!The Great Dragon: Kilgharrah (Creator/JohnHurt)

[-"There is no right or wrong. Only what is and what isn't."-]

[[quoteright:256:http://static.tvtropes.org/pmwiki/pub/images/bigger_dragon_9908.jpg]]

The last of the dragons who was captured during the time of the Great Purge and imprisoned in the dungeons under Camelot as an example of Uther's victory over magic. With an extensive knowledge of future events, the dragon introduces Merlin to his destiny and provides guidance over the course of his life.

* AndroclesLion: {{Inverted}}
* AntiVillain: Until his HeelFaceTurn, as he has ''very'' good reason to despise Uther.
* BecauseDestinySaysSo: Practically his motto.
* BigBad: The final episode of series two.
* BigBrotherInstinct: To Merlin. Kilgharrah's treatment of Merlin in Series 2 is best described as a come and go fondness. In Series 3, after becoming spiritual brothers, Kilgharrah burns up Serkets trying to kill Merlin, doesn't want him to leave the cave until he's fully recovered, and allows him to ride him despite the fact that the series 3 finale shows he detests being used as a horse. He still occasionally treats him like an idiot, but given that we have only one talking dragon to draw references from, this could have been a normal big brother relationship among dragons.
* BigDamnHeroes: [[spoiler:Comes to Merlin's rescue in ''[[{{Recap/MerlinS03E01TheTearsOfUtherPendragonPartI}} The Tears of Uther Pendragon Part I]]'', then again in ''[[{{Recap/MerlinS04E02TheDarkestHourPartII}} The Darkest Hour Part II]]''.]]
* BreathWeapon: He shoots fire from his mouth, mostly as a defence weapon.
* CharacterizationMarchesOn: He started out as rather flat character giving Merlin cryptic hints in riddles to defeat the monster of the week. When Mordred showed up around episode 8, he became a more darker and complex character.
* DemotedToExtra: In Series 5. [[spoiler: With good reason, as he is dying of old age.]]
* DisproportionateRetribution: His attack on Camelot. Uther slaughtered his entire kind, and in response he attempts to raze the city to the ground, leaving Uther untouched as his subjects die. Well, it's the exact same thing that Uther did to him, but he was still killing innocents.
* EccentricMentor: For the first few episodes he would always talk to Merlin in riddles.
* FanNickname: [[HoYay Slash Dragon]].
* FigureItOutYourself: In the first few episodes of Series One, when Merlin came to him for help, the Dragon would often tell the answer in a riddle, that Merlin would have to figure out.
* GiantFlyer
* HeelFaceTurn: When Merlin spares him despite his rampage on Camelot, the Dragon becomes a nicer though still cynical person.
* ItHasBeenAnHonor: In ''[[{{Recap/MerlinS04E02TheDarkestHourPartII}} The Darkest Hour Part II]]'' this is his reaction to Merlin stating that he’s going to sacrifice himself to seal off the spirit world. You can clearly hear the fondness and grief in his voice at the notion of Merlin dying, but it’s also obvious that Kilgharrah is incredibly proud of Merlin’s conviction and good nature.
* ItsAllAboutMe: Orginally his main motivation for helping Merlin was so that he would be free from his imprisonment. Later he developed a genuine fondess for the warlock.
* KarmaHoudini: He was never really punished for his rampage on Camelot: merely banished on pain of death by Merlin.
* LastOfHisKind: [[spoiler:Not anymore due to the hatching of Aithusa.]]
* ManipulativeBastard
* [[EvilMentor Morally Ambiguous Mentor]]
* MrExposition: Shares this trope with Gaius
* NoNameGiven: For the first two series at least. In the last episode of series 2, he was identified as "Kilgharrah" for the first time.
* NotSoOmniscientAfterAll: Remember all his prophecies about how Arthur would legalize magic and unite Albion and rule over the Golden Age, with the white dragon Aithusa as a symbol of the world that he and Merlin would build together? [[spoiler:Never happened]].
* OmniscientMoralityLicense: He's advised/ordered Merlin to do some ''incredibly'' dodgy stuff, including letting a child die and killing a terrified woman.
* OnlyOneName
* OurDragonsAreDifferent: Can talk perform magic, have incredibly long life spans and be controlled by Dragonlords.
* Really700YearsOld: He's at least a thousand years old, and claims to have seen civilizations rise and fall. [[spoiler: Although he's about to die of old age when the series end.]]
* SapientSteed: Whenever Merlin hitches a ride.
* [[spoiler:SecretlyDying: Although the secret's out in The Kindness of Strangers.]]
* SeenItAll: There's very little he ''can't'' give Merlin a spell or solution for. As long as the threat or problem is magical in nature, personal problems not so much. Justifed in that he's at least a thousand years old.
* TreacherousAdvisor: Betrays Merlin twice, both by having him almost kill his mom, and then attacking Camelot after he was freed.
* WhatTheHellHero: Merlin calls him out on some of his morally questionable decisions.
** In ''[[{{Recap/MerlinS03E05TheCrystalCave}} The Crystal Cave]]'' he’s enraged at the fact that Merlin forces him to divulge a spell to heal Morgana by using his Dragonlord powers, considering it a serious breach of trust.
* WouldHurtAChild: At least by omission: he tries to prevent Merlin from saving Mordred, when Mordred was a little kid and still ''very'' innocent.

!Nimueh (Michelle Ryan)

[-"I have watched so many people I love die at your hands, Uther Pendragon. Now it is your turn."-]

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/nimueh_7083.jpg]]

The sorceress who cast the spell that allowed Uther and Igraine to conceive Arthur. After Igraine died in childbirth as per the conditions of the magic, it served as a catalyst for Uther's hatred of magic and the massacre that followed. Throughout the first season, Nimueh works against Uther from a distance in order to undermine his rule. She appeared in ''[[{{Recap/MerlinS01E03TheMarkOfNimueh}} The Mark of Nimueh]]'', ''[[{{Recap/MerlinS01E04ThePoisonedChalice}} The Poisoned Chalice]]'', ''[[{{Recap/MerlinS01E09Excalibur}} Excalibur]]'' and ''[[{{Recap/MerlinS01E13LeMortdArthur}} Le Mort d'Arthur]]''.

* ArcVillain: She's only had a role in series one.
* {{Badass}}: Nimueh is a very powerful sorceress.
* BadassBoast: She uses threats towards her opponents to scare them off and let them know just how powerful she truly is.
* BestServedCold
* BigBad: Nimueh is the villain of most of season one.
* BlackMagic: Seemed to practice dark magic the most.
* TheChessmaster: Nimueh is rather manipulative and cunning in nature, best demonstrated when she attempts to destroy two warring kingdoms' chances at a peaceful treaty while simultaneously giving Merlin a fatal dose of poison.
* DealWithTheDevil: Merlin makes a deal with her in ''[[{{Recap/MerlinS01E13LeMortdArthur}} Le Mort d'Arthur]]''.
* DecoyDamsel: In ''[[{{Recap/MerlinS01E04ThePoisonedChalice}} The Poisoned Chalice]]''.
* [[EvilSorcerer Evil Sorceress]]
* [[HeyItsThatGuy Hey It's That Girl]]:
** After she dies, she [[Recap/DoctorWhoS30E15PlanetOfTheDead ends up on a sandy world with David Tennant]].
** Also recognizable to UK soap fans as [[Series/EastEnders Zoe Slater]].
** She's also [[{{Jekyll}} Dr. Jackman's]] assistant.
* [[HighPriest High Priestess]]: Of the Old Religion.
* HotWitch
* IceQueen: Nimueh has a very icy and sociopathic personality. She doesn't show any emotion.
* InTheHood: In ''[[{{Recap/MerlinS01E09Excalibur}} Excalibur]]''.
* KilledOffForReal: [[spoiler: By Merlin, [[ShockAndAwe in the most badass way ever.]]]]
* LackOfEmpathy: Nimueh doesn't show andy guilt or remorse for other's suffering.
* LadyInRed
* MagicIsEvil: When Nimueh uses magic.
* ManipulativeBitch
* MsFanservice
* OlderThanTheyLook
* OnlyOneName
* PlayingWithFire: She throws a fireball in ''[[{{Recap/MerlinS01E13LeMortdArthur}} Le Mort d'Arthur]]''.
* PoisonIsEvil
* SeenItAll: Her response when Gaius comes to her to offer his life in exchange for Merlin's.
* StarterVillain
* TamperingWithFoodAndDrink: {{Inverted}} in the ''[[{{Recap/MerlinS01E04ThePoisonedChalice}} The Poisoned Chalice]]'', in that it is the ''chalice'' that is poisoned, not the drink.
* TooDumbToLive: Granted, Merlin can't seem like much of a threat. But she decided that, rather than avoid angering Merlin by choosing a victim he would not know, she would go for his mother which she knows is a BerserkButton of his. And then she lures him to the Isle of the Blessed for a face-off. And when he gets up unscathed from a ''fireball to the chest'', she just smirks at him patronizingly. The worst part? Unlike most villains, she actually knew she was fighting the greatest wizard of all time, and it doesn't even occur to her that this might be a really bad idea. Merlin proceeds to show the audience just why this was a bad idea: by exploding her with lightning in what some fans consider the best [[Awesome/{{Merlin}} Crowning Moment of Awesome]] in the entire show.
* UnknownRival: Though she is a formidable opponent, most of her evil plans are done from a distance, and Prince Arthur never discovers who she truly is after she pulls a DecoyDamsel on him. She interacts only once with King Uther (who would be her major foe) but then dies in the season finale without having any sort of confrontation with either Uther or Arthur. In fact, it's unclear whether they even know that she's dead.
* WaterSourceTampering: In ''[[{{Recap/MerlinS01E03TheMarkOfNimueh}} The Mark of Nimueh]]'' to create a MysticalPlague.
* WeCanRuleTogether: She tries this with Merlin. It doesn't work.
* WitchSpecies
* VainSorceress: Nimueh looks like she takes care of her appearance quite a bit.
* TheVamp

!Lancelot (Santiago Cabrera)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/lancelot_729.jpg]]

[-"I would die for you one hundred times over. Live for me, or everything that I am has been for nothing."-]

A commoner who desires to become a knight of Camelot. He shares a brief romance with Gwen and becomes one of Merlin's long-term [[SecretKeeper Secret Keepers]]. He appeared in the first, second, third and fourth series.

* ActionHero
* AllLoveIsUnrequited
* BackForTheFinale: Of series three.
* BadassCape
* BadassNormal
* BackFromTheDead: [[spoiler: In season four by Morgana. Although, Lancelot came back as a shade.]]
* [[BettyAndVeronica Betty]]: To Arthur's [[BettyAndVeronica Veronica]].
* BigBrotherInstinct: Towards Merlin. Lancelot is seen to be highly protective of him.
* BigBrotherMentor: To Merlin.
* BigDamnHeroes: With Percival.
* BodyguardCrush: With Gwen. But this pertains more to the original Arthurian legend although it can also apply to the series.
* BrownEyes
* [[spoiler:CameBackWrong]]: [[spoiler:Deliberately so on Morgana's part.]]
* CatchPhrase: In the three episodes named after him he utters the phrase: "My name is Lancelot". In all three cases, it's his first line of the episode.
* ConflictingLoyalty: Always between what he wants and what he thinks he deserves. In his first appearance it was between becoming a knight of Camelot and staying true to his ideals by not taking credit for something Merlin achieved; in later episodes it exists between his fealty to Arthur and his desire for Guinevere.
* DidNotGetTheGirl
* [[spoiler:DyingAsYourself: When he dies the second time, he thanks Merlin for freeing him from Morgana's spell.]]
* EverythingButTheGirl
* [[spoiler:EvilCostumeSwitch]]: When he [[spoiler:comes BackFromTheDead as Morgana's UnwittingPawn, he's dressed in black. It's a wonder the good guys didn't notice...]]
* {{Expy}}: Of [[Series/{{Smallville}} Oliver Queen]].
* FailedASpotCheck: He did ''not'', which is the reason he is aware of Merlin’s magic. He clearly overheard Merlin’s incantation that helped him kill the Griffin. Worthy of noticing that he has been the ''only'' character to come to this logical conclusion.
* TheFettered: Lancelot is such a gentleman and so noble.
* {{Foil}}: To Arthur. He adheres to the same knightly code of honour but is unfailingly nice and polite as opposed to Arthur's temper tantrums (especially early on in the series). And he's the accessible with open admiration suitor to Gwen in contrast to Arthur's UptownGirl and hot-cold attitude.
* GenreSavvy
* [[spoiler:GoOutWithASmile: Twice, even.]]
* HeroesPreferSwords
* [[spoiler: HeroicSacrifice]]
* HeroicSelfDeprecation
* HeterosexualLifePartners: With Merlin. It helps that they both think the world of each other.
* HeyItsThatGuy: [[Series/{{Heroes}} Issac Mendez]] is Lancelot.
* HonorBeforeReason: Rejects the offer of becoming a real knight of Camelot in favor of first being true to himself.
* HumbleHero
* {{Hunk}}
* IncorruptiblePurePureness: The kindest, nicest and most noble of all the knights.
* IGaveMyWord: In ''[[{{Recap/MerlinS04E01TheDarkestHourPartI}} The Darkest Hour]]'' he promises Gwen that he'll protect Arthur, no matter what. [[spoiler: He sacrifices himself to uphold the promise]].
* IWantMyBelovedToBeHappy: Leaves in Season 2 after realizing that Arthur is in love with Gwen, and he doesn't want to come in between them.
** And again in ''[[{{Recap/MerlinS04E01TheDarkestHourPartI}} The Darkest Hour]]'' in which he [[spoiler:sacrifices himself]] to preserve the Arthur/Gwen relationship.
* [[spoiler:KilledOffForReal: The writers have confirmed that his story arc is finished, and he won't return to life again. HesDeadJim.]]
* KnightErrant
* KnightInShiningArmor
* LadyAndKnight: With Gwen.
* LongingLook: His expression of choice whenever in the vicinity of Guinevere.
* MasterSwordsman
* MrFanservice
* MuggleBestFriend: To Merlin. He was also the first person outside of Gauis that discovered Merlin's magic.
* NiceGuy: Is he ever. Perhaps the nicest, kindest and noblest person in the entire series. Even Kilgarrah mentions this to Lancelot.
* OnlyOneName
* PermaStubble
* PrettyBoy: Manages to be this ''and'' a {{Hunk}}. How is that even possible?
* PuppyDogEyes
* RagsToRiches: Sort of. He goes from a poor commoner with no title to his name to a Knight of Camelot in season three.
* RedOniBlueOni: Lancelot is the Blue to Arthur's Red. While Lancelot is more sensitive, calm, and compassionate, Arthur is more passionate, impulsive and hot-headed.
* RescueRomance: Played straight and then {{subverted}} in ''[[{{Recap/MerlinS02E04LancelotAndGuinevere}} Lancelot and Guinevere]]''. The two of them bond extremely quickly due to the life-or-death situation they find themselves in, but it is actually Arthur who ends up saving ''both'' of them.
* RichSuitorPoorSuitor: In the love triangle between himself, Arthur and Gwen. Lancelot is a commoner (Poor Suitor) and Arthur is a wealthy royal (Rich Suitor).
* TheRival
* RomanticFalseLead: His reappearance causes some conflict to the Arthur/Gwen romance.
* RomanticRunnerUp
* [[spoiler:SacrificialLion]]
* ScarsAreForever: Subverted. In 2x04 he's given a scar on his cheek which has disappeared by his next appearance in series 3.
* SecretKeeper: One of only two regular characters that knows Merlin's secret.
* SelfMadeMan: Born a commoner.
* SelfProclaimedKnight
* SensitiveGuyAndManlyMan: The Sensitive Guy to Arthur's Manly Man.
** Also the Sensitive Guy to Gwaine and Percival's Manly Man.
* [[spoiler:SoullessShell]]: In 4x09, thanks to Morgana.
* SpannerInTheWorks: To Arthur and Guinevere's relationship.
* StarcrossedLovers: With Gwen oh so much. In the Arthurian legends, their love affair is just, if not, even more tragic.
* TallDarkAndHandsome
* TrueCompanions: With Merlin, Arthur and the Knights at the Round Table.
* WhiteStallion

!Mordred (Asa Butterfield/Alexander Vlahos)

[-"My name is Mordred."-]

[[quoteright:229:http://static.tvtropes.org/pmwiki/pub/images/Senza_titolo-3_7351.jpg]]

Mordred is a young Druid boy who Morgana grows instantly attached to. According to the Great Dragon, Mordred will one day kill Arthur. Merlin's desire to help Mordred becomes heavily strained because of this. Also, another prophecy states that [[spoiler:Mordred and Morgana will be united in evil]]. He appears in the first, second and fifth series.

* {{Adorkable}}: When the older knights tease him.
* AmbiguouslyEvil
* AntiVillain
* BadassCape: When Mordred became a knight.
* FutureBadass: Mordred goes from a small, unknown Druid boy from a small village, to a knight of Camelot under King Arthur's rule. [[spoiler: Not only that, but in the future, he is the ultimate demise of King Arthur.]]
* HiddenBadass
* BecauseYouWereNiceToMe: This is most likely the cause of Mordred's loyalty towards Morgana.
** He also wants to save Arthur 'cause Arthur saved him when he was a child.
* BewareTheQuietOnes: When Mordred was a child, he didn't talk much, if ever. But he smashed a mirror with his powers when he was angry and upset over one of his kind being executed. That was a clear sign to not mess with this kid.
* BigBad: Eventually.
* BigBrotherWorship: Towards Arthur. Ironic, considering Mordred is his son in the legends.
** Considering that Mordred was originally just another foe of Arthur's in the earliest tellings (who was upgraded to major villain and Arthur's incestuous spawn in later tellings - ''Le Morte D'Arthur'' by Sir Thomas Mallory can probably be credited for this), one can argue that this is Mordred's character being brother full-circle.
* BrokenPedestal: All the time. He idolized Merlin, who's like the magic world's greatest rockstar, and he keeps trying to kill him for no reason. He has a special bond with Morgana, who was sweet and caring, and she became a vengeful woman driven by hate. He worships Arthur, and he [[spoiler:has his beloved hanged]]. He considers the knights friends, and they [[spoiler:let him down when he needed them the most]].
* TheBusCameBack: He's been recast for series five.
* ChildMage
* ChildProdigy
* ChildrenForcedToKill
* CreepyBlueEyes: His unblinking gray-blue eyes when he is a child can be quite unsettling.
* CreepyChild
* CuteBruiser: As a child, he was a Druid with great strength and power.
* [[CuteWitch Cute Warlock]]: When he was a young child.
* DarkAndTroubledPast: His father was killed; he was injured and sentenced to death; he saw his [[DoomedHometown village destroyed]]; he was hunted down and forced to kill and after the TimeSkip he said he learned to keep a low profile to not be burned to the stake or sold out. Also, considering how clueless he is about the Old Religion, he probably didn't meet other sorcerers after leaving Alvarr.
* DeliberatelyCuteChild
* DesignatedVillain: ''[[invoked]]'' He is prophesied to be the one who will kill Arthur. When he was still a child and apparently did no harm, the Great Dragon bluntly told Merlin to leave him to his death. Later Merlin himself adopts the belief that Mordred will be up to no good.
* TheDreaded: To Merlin, who believes that he'll one day kill Arthur. [[spoiler:Which he does, but only because the entire situation was a twisted SelfFulfillingProphecy.]]
* [[{{Druid}} Druid Boy]]
* EnfanteTerrible
* EvilSorcerer: A very young one.
* {{Foil}}: To Merlin. They are both born having powerful magic with grand destinies. Both [[DesperatelyLookingForAPurposeInLife serve Arthur in hope to find acceptance]]. [[spoiler: Their love interests die by Arthur's hand]]. Merlin forgives Arthur for failing to live up to expectation. Mordred does not.
* {{Foreshadowing}}: He will someday kill Arthur.
** Right now there is a proper vision of him killing/wounding Arthur.
* FreudianExcuse: Mordred's storyline starts with him seriously injured by Camelot's guards and his father executed by Uther; then he is imprisoned and sentenced to death. He returned to his people only to have his mentor killed, his village destroyed by Arthur and he's forced to leave Morgana to save himself. After that he's openly hostile to the Pendragons, plus his caretaker is [[ManipulativeBastard Alvarr]]; then Merlin, someone he considers sort of an ally, sides with Camelot instead. Three episodes, and he already has a hell of a FreudianExcuse for the day he will be the BigBad.
** And now [[spoiler:the girl he loved gets killed on Arthur's orders]].
* FromNobodyToNightmare: In his first appearance he was just a helpless kid. With each subsequent episode he displays considerably more power, until he returns as an adult, and is one of the few villains who not only unnerves Merlin, but genuinely terrifies him.
* GlassShatteringSound: Mordred's screaming is so powerful that it has literally broken and shattered a glass mirror.
* HeartwarmingOrphan: {{Subverted}}. He did have traces of it at the start, but at the same time he was ''also'' a CreepyChild from Day One.
* HeelFaceRevolvingDoor: Though he's supposedly destined to kill Arthur, his loyalties are hard to determine, especially when he [[spoiler:turns on Morgana and stabs her InTheBack, saving Arthur's life in the process.]]
** [[spoiler:He has a FaceHeelTurn in 5x11]].
* HeyItsThatGuy: As a child he was [[Literature/TheBoyInTheStripedPyjamas Bruno]] and [[NannyMcphee Norman]]. As an adult, he's Dorian Gray.
* HiddenAgendaVillain: No one is quite sure what he's up to (if anything), least of all Merlin.
* IKnowYourTrueName: He constantly (but telepathically) refers to Merlin as "Emrys"; in fact, he's the first person in the show to mention that name to Merlin.
* InTheHood: Often wore hoods both as a child and as an adult.
* InnocentBlueEyes: When he first appears.
* InnocenceLost: Probably [[BecauseDestinySaysSo because destiny says so]]: he has to [[BigBad kill Arthur]], so a lot happens to make him change from a [[TheWoobie scared little boy]] to a [[EnfanteTerrible vindictive kid]].
* KickTheSonOfABitch: Whenever Mordred kills knights. It's sociopathic and TroublingUnchildlikeBehavior, especially for a kid that was raised by pacifists, but the people he was killing were intent on either killing a boy who was, from their perspective, a defenseless child, or dragging him off to Uther, who has [[WouldHurtAChild had children drowned in the past.]]
* [[spoiler:KilledOffForReal:]] As of ''The Diamond of the Day Part 2.''
* KillerRabbit: As a child, he was cute, adorable but very creepy and dangerous.
* [[LittleMissBadass Little Mister Badass]]: As demonstrated when he kicked the asses of a bunch of Camelot's guards with his magic in 2x03 and 2x11.
* MagicIsEvil
* MagicKnight: In 5x01, we see a prophetic vision of Mordred on the battlefield, wearing chainmail and wielding a {{BFS}}.
* MakeMeWannaShout: When his father in Series 1 and [[spoiler: girlfriend]] in Series 5 are killed, his scream shatters a mirror in the former case and [[spoiler: breaks the prison door]] in the latter.
* MySignificanceSenseIsTingling: He seems able to sense Merlin/Emrys' presence. He can also sense the deaths of his father and [[spoiler:girlfriend]].
* MysteriousPast: Particularly in the [[TimeSkip Time Skips]]. How'd he go from Iseldir's care to Aglaine's care to Alvarr's care to working with bandits?
* NamesToRunAwayFromReallyFast: NamesToRunAwayFrom/{{Mor}}[[TheDreaded dred]]
* NowLetMeCarryYou: Mordred is glad to take care of an injured Morgana, in thanks for her previously caring for him.
* NotSoDifferent: To Merlin. Both were born having powerful magic and have to hide their talents to non-magical people. Lampshaded by Mordred himself.
----> '''Mordred''': We are not so different. You and I.
* OnlyOneName
* OracularUrchin: It would seem so, as Alvarr says Mordred is the only one powerful enough to use the Crystal of Neahtid. Considering even ''Merlin'' had trouble with it, this would suggest great power indeed.
* TheOtherDarrin: He's been recast as [[http://ontd-merlin.livejournal.com/378554.html 23 year old Alexander Vlahos]].
* ParentalAbandonment: His father died and his mother was [[MissingMom never mentioned in the first place]].
* ParentalSubstitute: Not very lucky with them: the first one was killed by Camelot's knights and the second was a ManipulativeBastard who wants to use him and Morgana to bring Uther down.
* PuppyDogEyes: Oddly, teen-Mordred seems a puppy who's trying to be loved much more than [[CreepyChild child-Mordred]].
* PutOnABus: Unfortunately, Asa Butterfield (Mordred) won't be in Season 3 and 4 because of scheduled filming conflicts. He ran off into the forest at the end of season two and hasn't been seen since.
* ReformedButRejected: Seems the case with Merlin: since his returning Mordred has done anything evil or wrong, [[spoiler:he actually saved Arthur life ''twice'', one almost dying in the process]], but Merlin doesn't trust him and basically wants him dead.
* RuleOfThree: Has appeared three times in the first two seasons.
** With the recasting he is in three seasons.
* TheRunaway
* ScarfOfAssKicking: And it's ''bigger than Merlin's''.
* SchiffOneLiner[=/=]WhamLine: 1x08 when he reveals his identity -- the above quote.
* TheSociopath: A budding example.
* SonicScream
* StartOfDarkness: In 2x03 Mordred is forced to kill some soldiers in self-defense, but shows absolutely no remorse.
* TheTeamWannabe: Looks like Mordred really wants to be part of ''something'', and he's trying really hard to gain Merlin's trust and friendship.
* {{Telepathy}}: Has contacted several characters -- including Merlin and Morgana -- with his thoughts.
* ThisIsUnforgivable: When Merlin attempts to prevent Mordred from escaping the Camelot knights in 2x11, Mordred ends up killing the knights and warning Merlin telepathically that he will not forgive Merlin nor will he forget this betrayal.
** Looks like he did forgive him, though: some things he said seems to imply that Mordred considers his old attitude a result of being a child, not fully understanding what was going on and all the implications.
*** Harming his beloved is an entirely different thing.
* TimeShiftedActor: Thanks to the [[TimeSkip Time Skips]] between seasons, it's been seven years since Mordred was last seen, thus allowing Alexander Vlahos to step in as an older version of the same character.
* TroublingUnchildlikeBehavior: Merlin is shocked when he witnesses Mordred killing several knights with a SonicScream - even worse is the kid's reaction - he looks around at the bodies with a small smile and casually runs away.
* TheVoiceless: Played straight in 1x08, where Morgana start to wonder if he's too afraid to speak or he can't. In later episodes Mordred is more verbal, but still seems to prefer telepathy over voice.
* [[WitchSpecies Warlock Species]]: Mordred is a Druid with magical abilities.
* WildCard: Season 5. [[spoiler: Stabs Morgana in the back, joins the knights, shows kindness to the prisoners, doesn't use his magic, and doesn't reveal Merlin's identity to either Arthur or Morgana.]] So far, the show's doing a very good job not letting us know if he's heel or face.
* WiseBeyondTheirYears: Or so it would seem.
* YouAreNotAlone: He tries this on Merlin ''and'' Morgana in 5x02, only to be cold-shouldered by Merlin and on the receiving end of a crazy rant from Morgana. One gets the sense that he [[spoiler:chose Arthur]] not just because [[IOweYouMyLife I Owe Him My Life]] but because he doesn't fully trust the only other two magic-users on the show.

[[/folder]]

[[folder:Characters Introduced in Season 2]]

!Sir Leon (Rupert Young)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/leon-1_3351.jpg]]

A Knight of Camelot seen throughout series 2 and made a semi-regular in the third, fourth and fifth series.

* ActionHero: He's a Knight of Camelot who uses combat to solve missions.
* AscendedExtra
* BackStory: Is linked with Gwen. We find out at the end of season 3 that her mother was a maid in his family's household, and [[LikeBrotherAndSister the two of them grew up together]].
* BadassBeard
* BadassCape
* BadassNormal: It really shines in ''[[{{Recap/MerlinS03E02TheTearsOfUtherPendragonPartII}} The Tears of Uther Pendragon]]''.
* BearerOfBadNews: It's usually his job to inform people that evil forces are advancing on Camelot.
* BigBrotherInstinct: Like the other knights, Leon is seen to be protective of Merlin.
* CanonForeigner: On account of him starting as a BitCharacter and becoming an AscendedExtra thanks to the actor's popularity among the rest of the cast, Sir Leon is the only knight of the Round Table that has no basis in Arthurian legend.
* CharacterizationMarchesOn: In one of his first appearances (''[[{{Recap/MerlinS02E07TheWitchfinder}} The Witchfinder]]'') he is shown tearing apart Gaius's study in an attempt to find evidence of magic, smashing bottles and overturning tables. It's difficult to imagine the later, more gentler, Leon doing such a thing.
** Though in fairness, it was during a WitchHunt that [[OOCIsSeriousBusiness left tensions running high]]. After all, if he hadn't have searched ''everything'' and it later turned out that Gaius ''was'' a sorcerer, Leon could have been burnt at the stake as a collaborator.
* ChildhoodFriends: With Guinevere.
* DisguisedInDrag
* HeroesPreferSwords
* KnightInShiningArmor
* TheLancer: To Arthur.
* LikeBrotherAndSister: With Gwen. See ChildhoodFriends.
* NumberTwo: He seems to be this to Arthur among the Knights.
* MasterSwordsman
* MauveShirt
* OlderAndWiser: Among the Knights. And it shows, as he is often calm, collected and sensible.
* OnlyOneName
* RomanceOnTheSet: There are persistent rumors that he's dating Creator/AngelCoulby.
* ShirtlessScene: Which cemented his position as a major cast member.
* UnexplainedRecovery: Known amongst fans for being "immortal". Got fried by a dragon at the end of one series, was completely fine at the beginning of the next. Later seemed to have died during an attack on his patrol but survived certain death by drinking from a magical cup given to him by the druids and returned to Camelot more or less unharmed. [[spoiler: And now, contrary to all reasonable expectations, he has actually survived the whole series. Something ''Arthur'' didn't manage to do. He's even in one of the last shots.]]

!Morgause (EmiliaFox)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/morgause_9619.jpg]]

[-"Arthur Pendragon, a great destiny awaits you. The battle for your soul is about to begin."-]

A mysterious sorceress who has a connection to Morgana, Morgause desires the doom of Uther and Camelot. She appears in the second, third and fourth series.

* ActionGirl: So much that she can best ''Arthur'', the best swordsman in Camelot, in a duel.
* {{Badass}}: Not only is Morgause a powerful witch, but she is also an excellent swordswoman.
* BadassBoast
* TheBaroness: The Rosa Klebb type.
* BigBad: Of season three, after being built up some during season two.
* BigSisterInstinct[=/=]CoolBigSis: Towards Morgana. Seriously, what sister would [[spoiler:give you a kingdom to reign over?]]
* BlondesAreEvil
* BreakoutVillain: She was only going to be around for a couple of episodes until the writers released how important she was to Morgana's StoryArc.
* BrownEyes
* ChainmailBikini: Averted. She gears up for combat appropriately.
* TheChessmaster
* TheCorrupter
* DangerouslyGenreSavvy: Morgause is pretty aware of what is going on around her and she always has a plan.
* DarkActionGirl
* TheDeterminator
* EnemyMine[=/=]FireForgedFriends: Morgause and Cenred seem to be allies over their mutual hatred for Uther.
* [[EvilSorcerer Evil Sorceress]]
* EyeColorChange: When Morgause uses magic, her eyes become golden-coloured.
* GirlyBruiser: Morgause is reasonably feminine and she can kick some major ass.
* GoodScarsEvilScars: The evil kind.
* HeterosexualLifePartners: With Morgana.
* [[HighPriest High Priestess]]: Of the Old Religion.
* HotGirlsAreBitches
* HotWitch
* IceQueen: Morgause is cold, ruthless and uncaring.
* KickTheDog: Putting a spell on Morgana to make her the vessel to summon the Knights of Medhir in order to destroy Camelot ''without'' telling Morgana probably wasn't Morgause's best idea in the world...
* [[spoiler: KilledOffForReal: By ''Morgana'' in the series 4 premiere. It's a MercyKill, with Morgause's full consent.]]
* [[KnightTemplarBigBrother Knight Templar Big Sister]]
* LackOfEmpathy: Morgause has no guilt or remorse for who she hurts.
* LadyInRed
* LadyOfBlackMagic
* LongLostRelative
* MagicKnight: She's a witch and also a very skilled swordswoman.
* ManipulativeBitch: And how.
* [[MasterSwordsman Master Swordswoman]]: She can give Arthur a run for his money in a sword challenge or duel.
* MsFanservice
* NamesToRunAwayFromReallyFast: NamesToRunAwayFrom/{{Mor}}gause.
* OnlyMostlyDead: [[spoiler:Apparently killed in the season 3 finale, but she comes back in season 4. Given her mutated face, it's clear that she and Morgana went to extreme lengths to keep her alive.]]
* OnlyOneName
* PetTheDog: In spite of her plot to murder Uther, Morgause does find time to reunite with her half-sister Morgana and give her a bracelet that would help her sleep. [[spoiler:And help her take over Camelot...]]
* RememberTheNewGuy: Partially justified in that she and Morgana were deliberately kept apart.
* TheReveal: She is Morgana's [[LongLostRelative half]]-[[SeparatedAtBirth sister]]. Though it's not totally clear through which parent they're related, popular FanWank is that they share a mother: Vivienne.
* RomanticTwoGirlFriendship: With Morgana.
* SamusIsAGirl: Her {{Badass}} debut.
* SmugSuper
* SupernaturalGoldEyes: When using magic.
* ThanatosGambit: [[spoiler:She ensures that her death furthers Morgana's cause]].
* UndyingLoyalty: To her half sister, Morgana.
* UnkemptBeauty: When fully armored. Otherwise, she seems to take time to style her hair and also dress very nicely.
* TheVamp
* VillainsNeverLie: Everything she tells/shows Arthur about his mother is the truth, and it's ''Merlin'' that has to coax Arthur back into believing the lies surrounding the circumstances of his birth.
* WellIntentionedExtremist

!Freya (Laura Donnelly)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/freya_5160.jpg]]

[-"You already saved me. You made me feel loved."-]

Freya is a young Druid woman with a dark secret who Merlin protects from captivity. They develop a strong bond in the process. Freya becomes Merlin's first love. She appears in ''[[{{Recap/MerlinS02E09TheLadyOfTheLake}} The Lady of the Lake]]'', ''[[{{Recap/MerlinS03E13TheComingOfArthurPartII}} The Coming of Arthur Part II]]'' and ''[[{{Recap/MerlinS05E13TheDiamondOfTheDayPartII}} The Diamond of the Day Part II]].'' [[note]]Or at least her arm does[[/note]]


* AdaptationalHeroism: In some depictions, the Lady of the Lake learns magic from Merlin and eventually traps him in the trunk of a tree. Here, she helps save Camelot by advising Merlin and giving him Excalibur.
* AloofDarkHairedGirl
* BackForTheFinale: Of series three and five.
* BeautyEqualsGoodness: Although she was cursed, Freya was a kind and good-hearted individual.
* BeautyToBeast: Played straight due to her being cursed. When Freya transforms into the Bastet monster, she goes from being a fragile, beautiful girl to a huge, flying, and unattractive beast.
* BirdsOfAFeather: Merlin is able to develop such a strong bond with newcomer Freya because of the fact that they are both born of magic and must keep it a secret. In the process, they fall in love.
* BoyMeetsGirl
* BreakHisHeartToSaveHim: Freya runs away so that Merlin doesn't lose his chance at a good life in Camelot.
* BreakTheCutie
* BrokenBird
* [[BroodingBoyGentleGirl Brooding Girl, Gentle Boy]]: [[GenderInvertedTrope Gender-Inverted]]. Freya is the Brooding Girl to Merlin's Gentle Boy. Merlin manages to make brooding, isolated and cursed Freya feel happy and loved.
* BrownEyes
* CannotSpitItOut: Freya has a hard time expressing how she's feeling about everything basically.
* [[ChekhovsGunman Chekhov's Gunman]]: She [[spoiler:returns at the end of Season 3 in order to deliver Excalibur into Merlin's hands so that he can defeat the immortal army.]]
* TheCutie: Oh so much. Freya is very endearing.
* DarkAndTroubledPast: Freya was attacked and almost raped by a man and she killed him in self defence. After the man's mother, who was a sorceress found out what Freya had done to her son, she cursed Freya to become the Bastet so that she was cursed to kill forever against her will.
* DarkSecret: Freya is cursed and is a Bastet, which is a winged panther.
* DesignatedVictim: Definitely the victim of the episode. At least it wasn't Arthur this time around.
* DiedInYourArmsTonight
* DisproportionateRetribution: Perhaps. Freya turns into a Bastet because she killed a man in self-defence and was subsequently cursed by his vengeful mother. That's Freya's version of events, and there's no in-show reason to disbelief her.
* DistressBall
* DistressedDamsel
* [[{{Druid}} Druid Girl]]
* TheDulcineaEffect
* EeriePaleSkinnedBrunette
* EmotionlessGirl: Freya appears this way at first, but it turns out the reason for this is because Freya is hiding a deep, dark secret.
* EnigmaticEmpoweringEntity: In her second appearance. Freya becomes the Lady of The Lake and returns as a spirit to deliver Excalibur into Merlin's hands.
* FirstLove: For Merlin. Merlin fell hard for Freya, so much so that he wanted to run away with her and choose her over his destiny.
* GiantFlyer: In her winged panther form.
* GoOutWithASmile: Freya manages one before she dies.
* TheGwenStacy
* HerosMuse: For Merlin. Freya eventually becomes The Lady Of The Lake and assists Merlin, her FirstLove and TheHero, on his journey and his quests by retrieving Excalibur for Merlin whenever he or Arthur needs it.
* HiddenDepths: Freya appears as a regular girl but she actually suffered a lot of trauma due to her dark and troubled past. She is also cursed with being a Bastet.
* TheIngenue
* InvoluntaryShapeshifting: [[spoiler:She transforms into a giant winged panther at the stroke of midnight.]]
* IAmAMonster: Freya thinks of herself as this.
* IJustWantToBeNormal: Which is understandable considering that she had her free will and her humanity taken away from her against her will.
* IJustWantToHaveFriends: It was pretty obvious that Freya was lonely and yearned for love and friendship. Merlin gave that to her.
* KillTheCutie
* LadyInRed
* LittleDeadRidingHood
* TheLostLenore: She's this for Merlin.
* LoveAtFirstSight: With Merlin.
* LoveInterest: For Merlin. Turns out that Freya is [[SingleTargetSexuality the first and last girl that Merlin was ever in love with for the entire series.]] Since Freya died, Merlin hasn't shown that much romantic interest in another girl. Heartbreaking.
* LoveHurts
* LoveRedeems: She's not ''evil'', but Freya says that Merlin's love for her saved her in more than one way.
* MadeASlave
* MagicalGirl
* MagicalGirlfriend: For Merlin. Although Merlin is capable of attracting the opposite sex, he hasn't had much luck with love or having love interests. Freya was the first girl (from what is shown on the show) that Merlin truly loved and they were rather compatible.
* MeaningfulLook[=/=]LongingLook: Shares these with Merlin.
* MeaningfulName: Even though "Freya" isn´t one of the names given to the Lady of the Lake in the Arthurian legend, her name is Old Norse for "Lady", and alludes to Freyja, a goddess associated with love who rules over the fields of Fólkvangr, [[http://en.wikipedia.org/wiki/Avalon ''where half of those that die in battle go upon death]].''
* MixAndMatchCritter: Freya in her Bastet form has a panther's body and bat wings.
* MonsterSobStory: See DarkAndTroubledPast.
* MysteriousWaif
* OneShotCharacter: Though, it is implied that Freya will one day return as the Lady of the Lake in future to help Merlin for helping her.
** [[spoiler:Freya appeared in the final episode of Season 3, at least somewhat.]]
* TheOneThatGotAway: She represents this for Merlin.
* OnlyOneName
* PainfulTransformation
* PantheraAwesome
* ThePromise: '''Freya to Merlin:''' "Someday I will repay you." [[spoiler: She does once she becomes the ''Lady of the Lake''.]]
* ReallyBigCat
* RescueRomance: With Merlin. Merlin rescues Freya from being captured as a slave.
* SatelliteLoveInterest: She gets ''one'' scene in which she's permitted to share details of her past (and even that is more of a MythologyGag that establishes her affinity for lakes), the rest of the time she only exists so that Merlin can be her [[TheCaretaker Caretaker]], enjoy openly using his magic in front of her, and experience manpain when she dies. It's especially glaring when he takes her to a lakeside in order to [[LetThemDieHappy Let Her Die Happy]] and she mutters: "you remembered..." Well of course he remembered - her love of lakes is the only personal detail she ever shares with him!
* SecretIdentity: Freya was the Bastet but nobody knew that at first.
* SecretKeeper: One of the few characters who knew about Merlin's magic and secret identity.
* SecretRelationship: With Merlin. Nobody knew that Merlin was in love with Freya, not even Gaius.
* ShrinkingViolet: Freya comes off as really shy and introverted.
* SingleWomanSeeksGoodMan: Her relationship with Merlin. Although, she didn't seek to fall in love with Merlin. Merlin sought her out and fell HARD and she reciprocated.
* SoHappyTogether: With Merlin. Sadly, it doesn't last.
* SpiritAdvisor: For Merlin. Freya becomes the ''Lady of the Lake'' who will help Merlin.
* StarcrossedLovers: With Merlin SO MUCH.
** Her romance with Merlin was implied to have been known or destined according to the FisherKing in 3x08.
* SupernaturalIsPurple
* TheQuietOne
* UnkemptBeauty
* WeHardlyKnewYe
* WhenTheClockStrikesTwelve: Freya turns into a Bastet.
* TheXOfY: Freya as The Lady of the Lake.
[[/folder]]

[[folder:Characters Introduced in Season 3]]

!Cenred (Tom Ellis)

[[quoteright:223:http://static.tvtropes.org/pmwiki/pub/images/Cenred-merlin-on-bbc-16891208-1600-12001211_2858.jpg]]

The ruler of the rivaling kingdom of Cenred (named after himself), Cenred seeks the downfall of Uther and Camelot by becoming an accomplice of Morgause's. He appears in ''[[{{Recap/MerlinS03E01TheTearsOfUtherPendragonPartI}} The Tears of Uther Pendragon Part I]]'' and ''[[{{Recap/MerlinS03E02TheTearsOfUtherPendragonPartII}} II]]'', ''[[{{Recap/MerlinS03E07TheCastleOfFyrien}} The Castle of Fyrien]]'' and ''[[{{Recap/MerlinS03E12TheComingOfArthurPartI}} The Coming of Arthur Part I]]''.

* {{Badass}}
** BadassNormal
* BarbarianLonghair
* CurtainsMatchTheWindow
* EarlyBirdCameo: Was first mentioned in ''1x10''.
* EnemyMine[=/=]FireForgedFriends: Morgause and Cenred seem to be allies over their mutual hatred for Uther.
* EvenEvilHasStandards: He refuses to let his army die and withdraws the battle against Camelot once he realizes they can't win.
* [[spoiler:KilledOffForReal]]
* OhCrap: [[spoiler: When he realizes Morgause is going to kill him, and there's nothing he can do about it]].
* OnlyOneName
* ShipTease: There seems to be ''something'' going on between Cenred and Morgause. According to Morgause, Cenred only wishes to please her.
-->'''Cenred:''' You are very beautiful when you're angry.
-->'''Morgause:''' Is that why you continue to defy me?
-->'''Cenred:''' You wouldn't like it if I made it easy for you.
** And this:
--->'''Morgause''': Of course you do. After all, you stand to gain much from Arthur's death.
--->'''Cenred''': I don't deny it. But I'm rich and powerful already. I do this only to please you.
--->'''Morgause''': (with a seductive look) Is that so? Then please me.
* TallDarkAndHandsome
* TallDarkAndSnarky
* TheUnfought: He barely interacts with any of the good guys, and is ultimately [[spoiler:killed by Morgause]]. (He does briefly get in a SwordFight with Arthur, but it's in a DeletedScene for ''The Castle of Fyrien'' and occurs off-screen).
* [[spoiler: YouHaveOutlivedYourUsefulness]]

!Gwaine (Eoin Macken)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/gwaine_4553.jpg]]

[-"If there's one thing that I learned from my father's life is that titles don't mean anything. It's what's inside that counts".-]

A man who saves Arthur during a brawl at a town tavern, Gwaine is given hospitality at Camelot until his injuries heal. He resents nobles and is secretly the son of a knight. He helps Merlin in protecting Arthur from danger during the melee. He is a future [[http://en.wikipedia.org/wiki/Gawain Knight of the Round Table]]. He appears in the third, fourth and fifth series.

* ActionHero
* TheAlcoholic: Though not, by any means, in a bad way. Most of the time.
* BackForTheFinale
* {{Badass}}
* BadassCape
* BadassMustache[=/=]BadassBeard
* BadassNormal: So, so badass.
* BigBrotherInstinct: Seems to have adopted this stance toward Merlin and Elyan, the youngest of the new knights.
* BigBrotherMentor: To Merlin.
* BigDamnHeroes: [[RuleOfThree Three times]] no less.
* BlueBlood: Gwaine comes from a noble family, although Gwaine never acknowledges it in the beginning.
* BoisterousBruiser: Gwaine is friendly, extroverted, charming and fun-loving.
* TheCharmer: Flirts with Gwen in a playful manner, but when he notices Gwen's feelings for Arthur, the two remain good friends. In fact, their "friendliness" is enough to rile Arthur's [[GreenEyedMonster jealousy]] (and Merlin's amusement of said jealousy).
* DeadpanSnarker
* DemotedToExtra: He became this in series four and five - oddly enough, he got more screen-time and characterization as a guest star than as a series regular.
* DisappearedDad: Which gives Merlin and Gwaine something to [[BirdsOfAFeather bond]] [[NotSoDifferent about]].
* TheDrifter: At least until he's knighted.
* DualWielding: And he makes it Badass.
* {{Foil}}: To Arthur. According to the creators, Gwaine shows the possible friendship between Arthur and Merlin had Arthur not been royalty and is genuinely nice to Merlin ([[http://zahrawithaz.livejournal.com/25983.html this review says it best]]). He's also defiant to Camelot's elitism as opposed to Arthur, who upholds it. Last but not least, he's fun-loving, casual and a flirt as opposed to Arthur's formality.
* FreudianTrio: In the PowerTrio of himself (Strength), Merlin (Magic) and Arthur (Courage), Gwaine is TheMcCoy/Id (Fun-loving, roguish, carefree, rebellious, daredevil) to Arthur's TheSpock/Superego (Stoic, serious, strategic, noble, courageous) and Merlin's TheKirk/Ego (Balanced, neutral, peacemaker, the mediator between the opposing personalities of Arthur and Gwaine, friends with both Arthur and Gwaine). See TheMcCoy.
* GuestStarPartyMember: Throughout series three, before becoming a regular recurring character in series four.
* HairFlip: Reached MemeticMutation status by the end of his first episode.
* HeroesPreferSwords
* HeterosexualLifePartners: He's often seen with Percival, the two implied to have become close friends.
** His friendship with Merlin.
* HiddenDepths
* HoneyTrap: Falls into one at the hands of Eira in a subversion of the RescueRomance. He does figure it out pretty quickly, though, and is able to use her to feed Morgana false information. He seems pretty shaken by the whole thing despite previous hints that he is something of a womanizer.
* HonorBeforeReason: Refuses to expose his identity as the son of a knight out of his resentment towards nobles -- when Gwaine's father, a knight, died, Gwaine and his mother were left penniless, and the king in their land refused to give them any compensation. Gwaine would later change his opinion of Arthur after Arthur defends him.
* {{Hunk}}
* [[spoiler:KilledOffForReal:]] As of ''The Diamond of the Day Part 2.''
* KingIncognito: Gwaine isn't royalty, but secretly comes from a noble family, seeing as his father was a knight.
* KnightErrant: Gwaine is a knight but he's also a bit of a drifter.
* KnightInShiningArmour: Gwaine becomes knight of Camelot in season three.
* KnightInSourArmor: A minor example. His friendship with Merlin seems to be wearing down his cynicism.
* KnightKnaveAndSquire: Gwaine is The Knave to Merlin's The Squire and Arthur's The Knight. They are also a trio of Magic (Merlin), Courage (Arthur) and Strength (Gwaine), according to Grettir.
* LoveableRogue
* ManHug: Gives one to Merlin in 3x08, being the first one to hug Merlin.
** And again in 4x02 when [[spoiler: Merlin comes back, healed and alive after the Dorocha attack.]]
* MasterSwordsman
* TheMcCoy/'''Id''' (FreudianTrio): In the trio between himself (Strength), Merlin (Magic) and Arthur (Courage), Gwaine is TheMcCoy to Merlin's TheKirk and Arthur's TheSpock.
* MrFanservice
* MuggleBestFriend: To Merlin.
* NobleMaleRoguishMale: Gwaine and Arthur with Gwaine as the Roguish Male to Arthur's Noble Male.
** Interestingly enough, both Merlin and Gwaine are Roguish Males in comparison to Arthur who is a Noble Male.
* OddFriendship: With Merlin. The two seem to have absolutely nothing in common, but bond fairly quickly.
* OnlyOneName
* PermaStubble
* PluckyComicRelief: Gwaine is one of the most humorous characters in the series, especially alongside Merlin.
* ThePrankster
* ShirtlessScene: At least three in his introductory episode ([[SarcasmMode oddly enough]], titled ''[[{{Recap/MerlinS03E04Gwaine}} Gwaine]]'') -- and if he is wearing a shirt, the collar of said shirt is at least hanging open enough to give the audience [[MrFanservice something to look at.]]
* TheSlacker: Even after becoming a Knight of Camelot, he's the one most likely to be goofing off.
* TheSnarkKnight: Gwaine is the king of sarcasm and snark.
* TallDarkAndHandsome
* TallDarkAndSnarky

!Elyan (Adetomiwa Edun)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/elyan_8791.jpg]]

[-'''Gwen''': "He's just one of those people, never settled down, never thinks about the future, just follows his heart wherever it leads him".-]

Guinevere's estranged brother and only sibling. He appears in the third, fourth and fifth series.

* ActionHero
* [[AloofOlderBrother Aloof Younger Brother]]: Often away traveling from one place to another and never even visited Gwen when their father died.
* AnAxeToGrind
* BackForTheFinale
* {{Badass}}
** BadassCape
** BadassNormal
* BigBrotherInstinct: Like the other knights, he is protective of Merlin.
* BlackDudeDiesFirst: {{Averted}}.
* DeadpanSnarker: On seeing the ruined castle that Arthur has brought them to, he comments: "It's gotta be better than that cave."
* [[spoiler:DeathInTheLimelight: In the "The Dark Tower". In series 3, Elyan is introduced and knighted. The writers went on to do absolutely nothing with his character until mid-series 5, in an episode which explored his relationship to his sister, made him the key figure in a rescue mission, and gave him more lines than in any previous episodes. Any GenreSavvy viewer could see the giant bullseye on his head from the very first scene. Elyan did get a DayInTheLimelight episode in season 4 (that revolved around him being BrainwashedAndCrazy and trying to murder Arthur) but he's still an excellent example of this trope.]]
* DemonicPossession: In 4x10
* HeroesPreferSwords
* InTheHood
* ISeeDeadPeople: In 4x10
* [[spoiler:KilledOffForReal]]
* KnightInShiningArmor
* LongLostSibling: To Guinevere. Elyan is Gwen's younger brother.
* MasterSwordsman
* MrFanservice
* NowLetMeCarryYou: He pledges his fealty to Arthur in repayment for the rescue Arthur undertakes in ''[[{{Recap/MerlinS03E07TheCastleOfFyrien}} The Castle of Fyrien]]''.
* OnlyOneName
* RaceLift: The legendary Elyan was known as "Elyan the White". In the series, he's played by a black actor. Granted, "the White" would have referred to his pure soul, but it's still pretty funny.
* RememberTheNewGuy: Partially justified in that he and Guinevere were estranged for years.
* ShipperOnDeck: At the very least, he certainly isn't ''opposed'' to his sister Gwen dating the Prince of Camelot, judging by the smile on his face when they kiss at the end of ''[[{{Recap/MerlinS03E13TheComingOfArthurPartII}} The Coming of Arthur Part II]]''.
* TokenMinority

!Percival (Tom Hopper)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/percival_7190.jpg]]

[-"Your enemies are my enemies."-]

A warrior who arrives with Lancelot in order to help Arthur and his loyalists take back Camelot. Having showed up in the very last episode of the third season, we learn very little about him. He appeared in the third, fourth and fifth series.

* ActionHero
* AdaptationalBadass: In the original legends he is the epitome of GoodIsDumb and IdiotHero; here, he is the strong, silent type and more than capable of holding his own.
* BadassCape
* BadassNormal: Percival is a knight of Camelot and a skilled swordsman. Bordering on SuperStrength.
* BigBrotherInstinct: Was seen to be very gentle and caring towards Merlin in 4x02 when he carried him.
* BigDamnHeroes: With Lancelot.
* TheBigGuy: Percival is the tallest of the knights. Tom is also the tallest member of the Merlin cast.
* BruiserWithASoftCenter
* DogPileOfDoom: Though he throws it off pretty quickly.
* EleventhHourRanger
* EmotionalBruiser
* EvenTheGuysWantHim: Bradley James has freely admitted to having a man-crush on Tom Hopper.
* FriendToAllChildren: His EstablishingCharacterMoment in the first episode of season 4 is to endanger his own life to save three frightened children by carrying them all to safety in his arms.
* GentleGiant
* HeroesPreferSwords
* HeterosexualLifePartners: He's often seen with Gwaine, the two implied to have become close friends.
* {{Hunk}}
* KnightInShiningArmor
* LastEpisodeNewCharacter
* MasterSwordsman
* OneHeadTaller: He towers over the rest of the characters.
* OnlyOneName
* PietaPlagiarism: In 4x02 he carries Merlin in this manner.
* ShirtlessScene: He finally gets [[WalkingShirtlessScene an extended one]] in 5x01 and 5x02.
* SleevesAreForWimps: He's got them in the featured picture, but most of the time his armour is sleeveless, the better to show off Tom Hopper's rather extraordinary biceps.
* TheQuietOne
* WhatHappenedToTheMouse: A mild one, since it's the last episode, but Percival is last seen tracking Arthur and Merlin. He's back at [[spoiler: Gwen's coronation, though]].

[[/folder]]

[[folder:Characters Introduced in Season 4]]

! Lord Agravaine de Bois (NathanielParker)

[[quoteright:199:http://static.tvtropes.org/pmwiki/pub/images/Agravaineblackclothes_pic_9130_9699.jpg]]

[-'''Gaius''': "I suspect he's not as virtuous as he seems."-]

Arthur's uncle on his mother's side, Agravaine has been helping his nephew run the kingdom during Uther's sickness. It soon becomes clear that he's not a man to be trusted. He appears only in the fourth series.

* AffablyEvil
* AllLoveIsUnrequited: He seems to have a thing for Morgana. She couldn't care less.
* ArcVillain: Agravaine has a huge influence in season four due to being the uncle of Arthur. He's pretty much one of the main villains alongside Morgana throughout season four.
* AristocratsAreEvil: Played ''very'' straight.
* BitchInSheepsClothing
* BlackCloak
* BridalCarry: Carries Morgana like this when he finds her injured in the forest in 4x05.
* TheChessmaster: Agravaine is very scheming and cunning.
* ColorCodedForYourConvenience: He wears black, as does [[spoiler: Morgana]]. That pretty much sums it up.
* ConsummateLiar: He can look his nephew in the eye and swear on his dead sister's life that he isn't betraying him. (He is).
* CoolUncle: What Arthur sees him as.
* CorruptPolitician
* CreepyUncle
* DangerouslyGenreSavvy
* DarkIsEvil
* DevilInPlainSight
* DirtyOldMan: Seems to be creepily fascinated by both Morgana and Guinevere, and enjoys standing behind their chairs with his hands close to their necks. Overlaps with FoeYay and {{UST}}, especially in Morgana's case.
* TheDragon: To Morgana during season four.
* EvilChancellor
* EvilIsNotWellLit: He is first introduced stepping out of the shadows.
* EvilUncle
* GoodAngelBadAngel: The Bad to Merlin's Good.
* HandsomeLech: A sinister version.
* HeyItsThatGuy: Hey, it's InspectorLynley!
* HiddenAgendaVillain: He wants to sabotage Arthur's reign, but as of yet, we're not really sure ''why''. Unless his hatred of Uther extends to Arthur by proxy.
** A DeletedScene reveals that he's [[spoiler:in love with Morgana]].
* HiddenDepths: The end of 4x06 reveals that his feelings for Morgana run deeper than than we'd been led to expect.
* HypercompetentSidekick: Agravine is much more capable that Morgana as a manipulator and user of XanatosSpeedChess. In fact, if it where not for devotion towards Morgana, he would be a much better villain.
* IgnoredEnamoredUnderling
* {{Jerkass}}
* JerkWithAHeartOfJerk
* [[spoiler:KarmicDeath]]: Especially since no one really cares that [[spoiler:he's dead]].
* [[spoiler: KilledOffForReal]] [[spoiler: By Merlin, in a rather badass fashion.]]
* LoveMartyr: His devotion to Morgana is rather inexplicable considering she holds him in utter contempt.
* ManipulativeBastard: Oh so much.
* MeanCharacterNiceActor: While Agravaine is a bad guy, Nathaniel Parker is just absolutely adorable. Just listen to his laugh in the bloopers.
* TheMole
* ObviouslyEvil: Painfully so.
* OhCrap: [[http://oi48.tinypic.com/15fof8l.jpg A fairly priceless one]] when Gwaine catches him about to slit Gaius's throat.
* TreacherousAdvisor
* PromotionToOpeningTitles: As of 4x04 [[spoiler: after Uther's death in 4x03]], he's credited as a main cast member.
* RegentForLife: Played with. Though Arthur is more or less running Camelot, he appoints his uncle regent in his absence.
* RememberTheNewGuy: The writers take advantage of a year's TimeSkip between series three and four to introduce him as though he's been present in the kingdom all along. Even though he's never been mentioned before, there are lines like: "I promised your mother I'd always be there for you," and "I've known him since I was a child," though there's no indication where he's been all this time.
* RewardedAsATraitorDeserves: [[spoiler:Dies unmourned and unburied in an underground cavern]].
* ShooOutTheNewGuy: After being introduced at the start of series 4 and [[PromotionToOpeningTitles promoted to the opening titles]] in episode 3, he's written out permanently at the end of that same season without really doing anything particularly memorable or important during his run. Even [[spoiler:his death scene is all about Merlin]].
* {{Slimeball}}
* SmugSmiler
* SmugSnake
* ThickerThanWater: Arthur's reason for trusting him so implicitly.
* ToxicFriendInfluence: On Arthur
* VillainWithGoodPublicity
* WhatMeasureIsAMook: His PlotArmour eventually fails him, and he [[spoiler:is killed]] alongside a bunch of FacelessMooks.
* XanatosSpeedChess: Especially throughout 4x6.

! The White Dragon: Aithusa

[[quoteright:211:http://static.tvtropes.org/pmwiki/pub/images/big_dragon_3903.jpg]]

[-"The white dragon bodes well for Albion, for you and Arthur, and for the land you will build together."-]

A white baby dragon that Merlin hatches from a long-dormant egg, and said to be a good omen for the coming Golden Age of Arthur's reign. The events of the series four finale throw this into some doubt. He appears in the fourth and fifth series.

* AmbiguousGender: At his birth Kilgharrah identifies Aithusa as a "he", yet latest interviews with the cast refer to the dragon as a "she". It's either a RetCon or a GenderFlip.
* BreakTheCutie: From season five, it is pretty evident that Aithusa was tortured and abused when he and Morgana were locked up and isolated for months.
* BreathWeapon: Aithusa shoots fire from his/her mouth as a defence weapon.
* CharacterTitle: The episode in which he first appears is named after him.
* ChekhovsGunman: Appears in the very last scene of series four in order to save Morgana's life.
* CoolPet: To Morgana.
* CutenessProximity: Merlin is moved to tears.
* TheCutie: Oh so cute in the beginning.
* DiabolusExNihilo: In the series four finale.
* EggMacGuffin
* EvilAlbino: Apparently, though in his first appearance Kilgharrah comments on the auspiciousness of [[HeroicAlbino his whiteness]].
* FaceHeelTurn: Aithusa joined the dark side with Morgana.
* GiantFlyer: Later on, when he grows up.
* GoMadFromTheIsolation: Not as much insane as very severely rattled, but at an attempt to attack Merlin and an inability to speak seem to indicate he's not all there.
* HiddenAgendaVillain: We're never given any clear idea why he sides with Morgana over Merlin and Kilgharrah.
* InstantAwesomeJustAddDragons
* IntellectualAnimal
* KickTheDog: [[spoiler:By all appearances, he went through a lot of crap between series 4 and 5. He's emaciated, limping, and can't talk (either because he was never taught or because of some injury). He seems pretty loyal to Morgana, so it seems unlikely that she's responsible.]]
** Finally explained in 5x08. [[spoiler: He was trapped in a oubliette with Morgana for over 2 years and was left horribly crippled when he eventually outgrew his prison. According to his captor, his screams were even ''worse'' than Morgana's.]]
* LickedByTheDog: Aithusa's affection toward Morgana performs this function.
* LivingEmotionalCrutch: To Morgana. As of series 5, Aithusa seems to be the only thing keeping her tenuously sane.
* MeaningfulName: Means "light of the sun" in the language of dragons.
** IronicName: [[spoiler: Due to Morgana being captured, he spent the first two years of his life trapped in a dark pit]].
* MoralityPet: For Morgana in season four and five.
* OnlyOneName
* OurDragonsAreDifferent
* OutsideContextVillain: No one yet knows why he chose to heal Morgana. [[spoiler:And since he can't talk, he'll never be able to tell.]]
* RidiculouslyCuteCritter
* ShoulderSizedDragon: In series 4. In series 5, not so much.
* TeamPet: For Morgana and her army.
* ThereIsAnother: His birth means that Kilgharrah is no longer TheLastOfHisKind.
* UndyingLoyalty: To Morgana.
* TheVoiceless: Because apparently he's never learnt to speak.
* WhatHappenedToTheMouse: Merlin sends Aithusa away from the battle in the GrandFinale, never to be seen or mentioned again for the rest of the episode.


! Helios (Terence Maynard)

[[quoteright:211:http://static.tvtropes.org/pmwiki/pub/images/6400530697_b802a70d97_o-1_1768.jpg]]

[-"Were you expecting something different? Perhaps campfires and raw meat."-]

A womanizing warlord that Morgana enlists in her crusade against Camelot and whose army attacks it at the end of series four. He appears in ''[[{{Recap/MerlinS04E11TheHuntersHeart}} The Hunter's Heart]]'' and ''[[{{Recap/MerlinS04E12TheSwordInTheStonePartI}} The Sword in the Stone Part I]]'' and ''[[{{Recap/MerlinS04E13TheSwordInTheStonePartII}} II]]''.

* AffablyEvil
* AuthorityEqualsAsskicking
* BadassNormal
* BaldBlackLeaderGuy
* BaldOfAwesome
* BarbarianTribe: {{Subverted}}. When he wants to, he can be borderline WickedCultured.
* BatheHerAndBringHerToMe: Implied between Helios and Guinevere.
* TheBrute
* TheDragon: Seems to become this towards Morgana. Agravaine is GenreSavvy enough to note that there is a big possibility that he's much more a DragonWithAnAgenda. Then again, Agravaine may just be worried that he'll get replaced.
* EvenEvilHasStandards: Although his intentions toward Guinevere were hardly pure, he avoids the RapeIsASpecialKindOfEvil trope. Instead he seemed genuinely interested in her BackStory and lets her go without a fuss when she tells him that she's tired.
* EvilOverlord
* ItAmusedMe: Unlike Morgana's PsychoticSmirk or Agravine's SmugSmiler attitude when things are going their way, Helios' smiles and chuckles are more of genuine amusement. There are hints of him being a bit of a {{Troll}}.
* OnlyOneName
* ReasonableAuthorityFigure: Helios is an AffablyEvil version of this.
* TakingYouWithMe: [[spoiler: Gets killed by Isolde, but uses his last energy to kill her in turn before dying.]]
* TheSavageSouth: His mercenaries are referred to as "Southrons".
* ScaryBlackMan
* TheUnfettered: Devoted to Morgana in this sense, although we don't see much of him, and gives her his army. When [[spoiler: she ends up not being able to use magic]] he calmly steps in to defend her without panicking or running.
* WeHardlyKnewYe

[[/folder]]

[[folder:Minor Characters]]

! Geoffrey of Monmouth (Michael Cronin)

[[quoteright:213:http://static.tvtropes.org/pmwiki/pub/images/geoffofmonmouth_8674.jpg]]

Camelot's court genealogist, though he also works as a librarian, is a member of the royal council, and officiates over weddings and coronations. He appeared in the first four series, but not the fifth.

* AwesomeMomentOfCrowning: He's usually present, considering he's the one who officiates over them.
* BigOlEyebrows
* BitCharacter
* ChuckCunninghamSyndrome: He disappears completely after 4x02.
* CoolOldGuy
* ErmineCapeEffect
* LiteraryAgentHypothesis: His name suggests that this could be possible, as well as explaining why several aspects of typical Arthurian legends have changed so drastically (he's not being very accurate).
* MrExposition: Usually when Gaius is unavailable for some reason.
* MythologyGag: Geoffrey of Monmouth was real person; a 12th century bishop who was one of the earliest writers of tales of King Arthur and his father Uther.
* ReasonableAuthorityFigure
* SpookySilentLibrary: He works in one.

! Parents of the Main Cast

!! Hunith (Caroline Faber)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/hunith-1_8152.jpg]]

[-"It is every mother's fate to think her child is special, and yet I would give my life that Merlin were not so."-]

Merlin's mother, who sends her only son to Camelot at the start of the series in the hopes that he will learn to control his magical abilities under the guidance of her (much) [[WordOfGod older brother Gaius]]. She appears in ''[[{{Recap/MerlinS01E01TheDragonsCall}} The Dragon's Call]]'', ''[[{{Recap/MerlinS01E10TheMomentOfTruth}} The Moment of Truth]]'', ''[[{{Recap/MerlinS01E13LeMortdArthur}} Le Mort d'Arthur]]'' and ''[[{{Recap/MerlinS04E12TheSwordInTheStonePartI}} The Sword in the Stone Part I]]''.

* AbsurdlyYouthfulMother
* ActionMom
* BackForTheFinale: In series four.
* BerserkButton: To Merlin. Nothing gets him more riled or dangerous than if someone threatens his mother.
* BringHelpBack: In 1x10.
* GiveHimANormalLife: {{Inverted}}. Though she wants this for Merlin, she knows that he's exceptionally gifted. Rather than hide him away in Ealdor she sends him to Camelot to get tutelage for his abilities.
* [[GoodParents Good Parent]]
* LetsGetDangerous: When her village is attacked by bandits, she insists that she's going to fight or die trying.
* MamaBear: Towards Merlin of course. She's highly protective of him.
* TheOjou: Hunith is very kind, gentle, polite, maternal and soft spoken, despite not coming from wealth.
* OnlyOneName
* OpenMindedParent
* [[ParentsInDistress Parent In Distress]]: Hunith becomes gravely ill at the end of season one after Merlin makes a deal with Nimueh to save Arthur's life. Merlin does everything in his power to save his mother by sacrificing himself to Nimueh again.
* ThePollyanna: Hunith has a very hopeful and optimistic nature. Seems that Merlin inherited that trait.
* SeparatedAtBirthCasting: It's easy enough to buy her as Merlin's mother.
* ShipperOnDeck: She seems to be a huge Arthur/Merlin shipper.
* SoProudOfYou
* TeamMom: She appears to be maternal to everyone, including Arthur and Gwen.
* WhatHappenedToTheMouse: On two occasions she disappears abruptly from the episode; first when she falls sick (we're told that she recovers, but it happens off-screen) and second when mercenaries attack Ealdor at the end of series four (Merlin, Arthur and Gwen lead the attackers into the forest, and we're just left to assume that they left Hunith and the other villagers alone).

!! Queen Ygraine Pendragon (Alice Patten)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/ygraine_1865.jpg]]

[-"He sacrificed my life so the Pendragon dynasty could continue. It makes you no less my son, nor me any less proud of you."-]

Arthur's mother, Agravaine's sister, the late wife of Uther, and the former Queen of Camelot. She appeared in ''[[{{Recap/MerlinS02E08SinsOfTheFather}} Sins of the Father]]'' and ''[[{{Recap/MerlinS03E01TheTearsOfUtherPendragonPartI}} The Tears of Uther Pendragon Part I]]'' and ''[[{{Recap/MerlinS03E02TheTearsOfUtherPendragonPartII}} II]]''.

* BackFromTheDead: Very temporarily.
* BalancingDeathsBooks: The cause of her death; in order to conceive Arthur, Ygraine was doomed to die in giving birth to him.
* DeadPersonConversation: Thanks to Morgause's spell, Ygraine appears to Arthur to tell him the truth of his birth.
* DeathByChildbirth
* DeceasedParentsAreTheBest: Arthur idolizes his mother; so much that he even attacks his father when he finds out that he (Uther) is the cause of her death.
* HairOfGoldHeartOfGold
* TheHighQueen
* InnocentBlueEyes
* TheLostLenore: To Uther, whose death triggered his hatred of magic.
* MysteriousParent
* TheOjou
* OjouRinglets
* PlotTriggeringDeath: Her death is the reason for the Great Purge, which informs practically everything that follows.
* PosthumousCharacter
* PresentAbsence
* ProperLady
* RegalRinglets
* SacrificialLamb
* StrongFamilyResemblance: The casting nailed this one. Arthur is the spitting image of his mother.
* WomanInWhite

!! Balinor (John Lynch)

[[quoteright:280:http://static.tvtropes.org/pmwiki/pub/images/balinor_9634.jpg]]

[-"You don't choose to become a Dragonlord. It's not something you're taught. It's a sacred gift. For thousands of years it's been handed down from father to son."-]

Merlin's father and the last of the Dragonlords. In his youth he helped subdue the Great Dragon before Uther betrayed him and tried to have him executed. With Gaius's help he escaped to Ealdor where he was taken in by Hunith, only for Uther's men pursue him into the wilderness. He appeared in ''[[{{Recap/MerlinS02E13TheLastDragonlord}} The Last Dragonlord]]'' and ''[[{{Recap/MerlinS05E12TheDiamondOfTheDayPartI}} The Diamond of the Day Part I]]''.

* ActionDad
* BackForTheFinale: In the GrandFinale to [[spoiler: instruct Merlin about the nature of his magic]].
* BadassBeard
* BadassLongcoat
* BarbarianLonghair
* BeardOfSorrow
* TheBeastmaster: Balinor was a Dragon Lord who could command dragons. The gift was passed down from his father and when Balinor died, he passed the gift down to Merlin. Merlin then became the [[LastOfHisKind last Dragon Lord in existence.]]
* ChangedMyMindKid
* DaddyHadAGoodReasonForAbandoningYou: Balinor tells Merlin that he left Ealdor and Hunith because he wanted Hunith to be safe. Balinor says that he had too much danger and too many enemies surrounding him for him to stay in Ealdor and live a normal life with Hunith.
* DisappearedDad: Balinor was not aware of Merlin's existence till 2x13.
* FinalSpeech: He manages to impart some last words to Merlin about the nature of dragons.
* FunctionalMagic
* HealingHands
* TheHermit
* IHaveNoSon: Balinor says this to Merlin almost word for word in 2x13. [[spoiler: He later discovers that Merlin is his son.]]
* InTheBlood: Balinor says that the Dragon Lord powers are a sacred gift which are passed down in the lineage from father to son.
* KilledOffForReal
* TheLastOfHisKind: At least until he dies, at which point Merlin inherits his powers.
* LineageComesFromTheFather
* LongLostRelative: To Merlin, who is his long lost son.
* LukeYouAreMyFather: Merlin has to tell Balinor that he's his son. He had no idea that Hunith was even pregnant when he left Ealdor.
* MisunderstoodLonerWithAHeartOfGold: He is a loner and isolated from others but Balinor essentially has a good heart and good intentions.
* NatureHero
* NegatedMomentOfAwesome: His entire episode leads up to him deciding to return to Camelot to stop Kilgharrah with his Dragonlord abilities. Then he dies before he gets there.
* NoSocialSkills: Before he met Merlin, Balinor was very anti-social and hated everyone.
* OnlyOneName
* SummonMagic: Balinor was a Dragon Lord, therefore, summoning dragons was needed in order to tame them.
* TakingTheBullet: For Merlin
* WeHardlyKnewYe: Balinor ends up dying in the same episode that he is introduced.

!! Tom (David Durham)

[-"We're on the up now. Things are going to be different."-]

Guinevere's father, the local blacksmith. He appeared in ''[[{{Recap/MerlinS01E03TheMarkOfNimueh}} The Mark of Nimueh]]'' and ''[[{{Recap/MerlinS01E12ToKillTheKing}} To Kill The King]]''.

* BlackGuyDiesFirst: {{Averted}} and then played straight. He survives his first appearance, only to be killed by castle guards in his second.
* TheBlacksmith
* ForgottenFallenFriend: Notable for its {{aversion}}. Plenty of other far more important characters have fallen prey to this trope, but despite dying in series 1, Tom is consistently mentioned all the way into series 5.
* KilledOffForReal
* OnlyOneName
* MysticalPlague: But is healed by Merlin.
* SacrificialLion: The first reoccuring character to get killed off.
* SuddenSequelDeathSyndrome
* UnwittingPawn: To Tauren, who was using his blacksmithing skills to experiment with alchemy.

!! Vivienne

Morgana and Morgause's mother. Very little is known about her beyond the fact that she was married to Gorlois and had an affair with King Uther (which resulted in Morgana).

* GoodAdulteryBadAdultery: It's unclear whether she suffered any consequences from her dalliance with Uther.
* MementoMacGuffin: The bracelet that Morgause gives to Morgana when they first meet belonged to Vivienne.
* MissingMom
* MysteriousParent
* OnlyOneName
* PosthumousCharacter
* ShoutOut: Her name pops up frequently in Arthurian mythology, usually in connection to the Lady of the Lake.
* UnknownCharacter: We know nothing about her except her relationships to other characters.
* UnwittingInstigatorOfDoom: She gave birth to ''Morgana''!

! Kings, Queens, Princesses, and Other Assorted Royals

!! King Bayard (Clive Russell)

[[quoteright:169:http://static.tvtropes.org/pmwiki/pub/images/bayard11_1470.bmp]]

The King of Mercia. He is falsely accused of trying to poison Arthur as part of an EvilPlan devised by Nimueh. He appeared in ''[[{{Recap/MerlinS01E04ThePoisonedChalice}} The Poisoned Chalice]]''.

* ClearMyName
* ColourCodedArmies: He and the knights of Mercia wear blue, to contrast with the red-cloaked men of Camelot.
* FlatCharacter
* {{Frameup}}: Thanks to Nimueh
* HeyItsThatGuy: Clive Russell also played Lancelot's father in ''Film/KingArthur'' and Morgana's father Gorlois in ''TheMistsOfAvalon''. Guess he likes ArthurianLegend...
* HonourBeforeReason: He's prepared to drink from a (supposedly) poisoned goblet in order to prove his own innocence.
* TheGoodKing
* OneShotCharacter
* PeaceConference
* ReasonableAuthorityFigure
* UnwittingPawn: Nimeuh uses his gesture of presenting matching goblets to Uther and Arthur against him.

!! King Odin (Fintan [=McKeown=])

[[quoteright:168:http://static.tvtropes.org/pmwiki/pub/images/ODIN_8393.bmp]]

[-"I want you to kill the man who murdered my son. I want you to kill Arthur Pendragon."-]

The King of a land refered to only as "Odin's Kingdom". He has a vendetta against Arthur after his son was killed in a duel. He appeared in ''[[{{Recap/MerlinS02E02TheOnceAndFutureQueen}} The Once And Future Queen]]'' and ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]''.

* TheBusCameBack: In one of the most surprising displays of [[ContinuityNod Continuity]] this show has ever done, Odin returns ''forty-one'' episodes after he was last seen to finish off a StoryArc that had lay dormant for three seasons.
* CycleOfRevenge: Arthur attempts to stop this when Uther demands retribution from Odin after his attempt on Arthur's life. It doesn't appeared to have worked.
** A truce is finally agreed upon in ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]''.
* DuelToTheDeath: How his son was killed.
* FeudingFamilies: With the Pendragons.
* ItsPersonal: {{Subverted}} in that it's the ''villain'' who wants revenge on the ''hero''.
* MisplacedRetribution: Perhaps. We know very little about what really happened between Arthur and Odin's son, save that the latter ended up dead at the former's hands.
* RevengeMyopia: Odin wants Arthur dead because he killed his son; but Arthur claims that he was just defending himself.
* SmallRoleBigImpact: He's been on-screen for about two minutes back in series 2. In series 4 he sends an assassin to kill Arthur, who ends up fatally wounding Uther instead. He's also been mentioned frequently throughout the series.
** He returns in series 5 for an expanded role.
* SympatheticMurderer
* YouKilledMyFather: {{Inverted}}. This is a father seeking revenge for his son.

!! King Alined (David Schofield)

[[quoteright:209:http://static.tvtropes.org/pmwiki/pub/images/alined_9120.bmp]]

[-"If Olaf kills Arthur, then Uther will start a war. If Arthur kills Olaf, then ''his'' men will start a war. We cannot lose!"-]

The ruler of one of the Five Kingdoms. He comes to Camelot as part of a PeaceConference, determined to stir up enough trouble to drive the kingdoms back into war. He appeared in ''[[{{Recap/MerlinS02E10SweetDreams}} Sweet Dreams]]''.

* AmbiguouslyGay: He admits that he finds Arthur attractive, and there's rather a lot of SubText with his court jester.
* BadBoss: To Trickler
* BatmanGambit: He orders his jester to place Arthur and Lady Vivian under a LovePotion, betting that the fallout from various factions will inevitably lead to war.
* {{Chessmaster}}: If it hadn't been for Guinevere's TrueLovesKiss, he would have gotten exactly what he wanted.
* ChessMotif: He demonstrates his plans to Trickler using a chess set.
* DiplomaticImpunity
* FauxAffablyEvil
* KarmaHoudini: He doesn't get what he wants, but he still leaves Camelot scott-free.
* HeyItsThatGuy: [[PiratesOfTheCaribbean Mercer!]]
* ManipulativeBastard
* TheMatchmaker: Only in the sense that he wants Arthur and Vivian together in order to make trouble.
* PretextForWar
* WarForFunAndProfit

!! King Olaf (Mark Lewis Jones)

[[quoteright:210:http://static.tvtropes.org/pmwiki/pub/images/olaff_9792.bmp]]

[-'''Alined''': "Olaf is the most overprotective buffoon I've ever met. It would surely end the peace talks if anyone were to lay a finger on his daughter."-]

The ruler of one of the Five Kingdoms and father to Lady Vivian. He unknowingly [[UnwittingPawn plays into the hands of King Alined]] when his protectiveness of Vivian leads him to challenge Arthur to a duel, having been led to believe she's been seduced by him. He appeared in ''[[{{Recap/MerlinS02E10SweetDreams}} Sweet Dreams]]''.

* BoisterousBruiser
* BruiserWithASoftCenter
* DuelToTheDeath: Challenges Arthur to one.
* EasilyForgiven: After spending the entire episode rampaging over his daughter's virtue, Arthur brings their duel to a close and Olaf becomes entirely amiable.
* FlawExploitation: His protectiveness of Vivian is exploited by King Alined.
* HairTriggerTemper
* MyGirlIsNotASlut: In front of everyone, he calls Vivian "an innocent girl!" His daughter's reaction to this indicates that she's probably ''not''.
* OverprotectiveDad
* PapaWolf
* ThrowingDownTheGauntlet: Literally.
* UnwittingPawn
* YouAreGrounded: A variation. Vivian is being taken home, presumably for good.

!! Lady Vivian (Creator/GeorgiaMoffett)

[[quoteright:188:http://static.tvtropes.org/pmwiki/pub/images/VivianSD_7874.jpg]]

[-"''I'' am not ''most'' of your guests."-]

Lady Vivian is the bratty daughter of King Olaf. Accompanying him to the peace talks hosted at Camelot, she becomes the target of a love spell in an attempt to disrupt the proceedings by playing on the emotions of her OverprotectiveDad. She appeared in ''[[{{Recap/MerlinS02E10SweetDreams}} Sweet Dreams]]''.

* AlphaBitch
* BlondesAreEvil: Or at least quite spoiled.
* BeautyIsBad: As noted by Arthur, she's very beautiful but her manners are appalling.
* BrattyTeenageDaughter
* DaddysGirl
* TheDitz: Whilst under a spell.
* EverythingsBetterWithPrincesses: Oddly {{averted}}. Despite her father being a king, she's only ever referred to as a lady.
* IKissYourHand: Uther does this on greeting her.
* KissingUnderTheInfluence
* LargeHam
* LovePotion: Is the (permanent) victim of one.
* MissingMom
* RichBitch
* RoyalBrat
* SatelliteLoveInterest: Deliberately an InvokedTrope between her and Arthur. Being a RoyalBrat who only exists to flounce around in pretty clothes. The two of them are put under a [[LovePotion Love Spell]] that makes them act like SickeningSweethearts, much to the bafflement of everyone else.
* SickeningSweethearts: With Arthur
* SpoiledBrat
* StrongFamilyResemblance: InformedAttribute. When she arrives in Camelot, Uther tells Vivian she looks just like her mother. Since we never see her, we just have to take his word for it.
* TemporaryScrappy
* WellExcuseMePrincess
* WhatHappenedToTheMouse: Last we see of her, she's being carted off by her father. For all we know, [[FridgeHorror she's still under the love spell, pining for Arthur]].
* WomanInWhite

!! Princess Elena (Georgia King)

[[quoteright:209:http://static.tvtropes.org/pmwiki/pub/images/Elenapic_5917.jpg]]

[-"I'm not the perfect princess, am I?"-]

The Princess of Gawant and daughter of Lord Godwyn. Unbeknownst to her, she was possessed by a Sidhe fairy whilst just a baby, causing her to grow up with a variety of embarrassing traits and peculiarities. She appeared in ''[[{{Recap/MerlinS03E06TheChangeling}} The Changeling]]''.

* {{Adorkable}}
* AllGirlsLikePonies
* ArrangedMarriage: Godwyn and Uther organise one between her and Arthur.
* BadDreams: A side-effect of the Sidhe inside her.
* BizarreTasteInFood: She eats live frogs and seems to thoroughly enjoy it.
* BondingOverMissingParents: She and Arthur do this over their [[MissingMom Missing Moms]].
* ChangelingTale
* CuteClumsyGirl[=/=]{{Dojikko}}
* DaddysGirl
* DisposableFiance: Of the "Let's Call The Whole Thing Off" variety.
* DoesNotLikeShoes: Has to be told to put them on, she does so begrudgingly.
* EverythingsBetterWithPrincesses: Her father is Lord Godwyn, but she gets the rank of princess.
* HairOfGoldHeartOfGold
* IKissYourHand: Arthur does this as they farewell each other.
* JabbaTableManners: Another Sidhe side-effect.
* MeaningfulName: {{Averted}}. Sure it ''sounds'' a lot like Elaine, but she never meets Lancelot.
* MessyHair
* SatelliteLoveInterest: Notably {{subverted}} with two more of Arthur's. She is brought to Camelot to join in an ArrangedMarriage to Arthur, but instead of being treated as a mere impediment to his happiness with Guinevere, she is a likeable and developed character. Her importance to the narrative has less to do with her relationship to Arthur as it does her role as an UnwittingPawn in [[TheFairFolk The Fair Folks']] attempt to take over Camelot.
* SheCleansUpNicely: Once the pesky Sidhe is gone.
* TomboyPrincess: {{Subversion}}. All her tomboyish qualities are brought on by the Sidhe living inside her. Once it's gone, she's more like a PrincessClassic.
** Though she has a genuine love of horseback riding, which was never a Sidhe trait.
* UnwittingPawn: To the Sidhe.

!! Lord Godwyn (Simon Williams)

[-"Maybe it's time things changed."-]

The ruler of Gawant and father of Princess Elena. Due to his old friendship with Uther, the two have organised an ArrangedMarriage between their children. He appeared in ''[[{{Recap/MerlinS03E06TheChangeling}} The Changeling]]''.

* CoolOldGuy
* DotingParent
* ManHug: With Uther
* NiceGuy
* OpenMindedParent

!! King Caerleon (Steven Hartley)

[-"You did not choose anything, boy. It is I who choose to die, and I alone".-]

The King of Caerleon. After being caught trespassing in Camelot's territory he is caught and beheaded by Arthur. He appeared in ''[[{{Recap/MerlinS04E05HisFathersSon}} His Father's Son]]''.

* BitPartBadGuy
* FaceDeathWithDignity
* HonourBeforeReason: Faced with a choice between signing a peace treaty and getting his head cut off, he chooses death.
* IdiotBall: He practically grabs Arthur's sword and cuts his own head off.
* KingIncognito: For a while, at least until Agravaine notices his medallion.
* OffWithHisHead

!! Queen Annis (Lindsay Duncan)

[[quoteright:211:http://static.tvtropes.org/pmwiki/pub/images/AnnisQ_6614.jpg]]

[-"There is something about you Arthur Pendragon. Something that gives me hope for us all."-]

The Queen of Caerleon. After her husband is executed at Arthur's hands, she is goaded by Morgana into seeking revenge. She appeared in ''[[{{Recap/MerlinS04E05HisFathersSon}} His Father's Son]]'' and ''[[{{Recap/MerlinS05E01ArthursBanePartI}} Arthur's Bane Part I]]''.

* ArmorPiercingSlap: She gives not one but ''two'' to Arthur.
* ApronMatron
* [[BadassPrincess Badass Queen]]
* BadassInCharge
* BadassNormal
* BloodKnight: GenderFlipped and {{subverted}} when Arthur convinces her to declare peace.
* TheCameo: Appears briefly in 5x01 to grant safe passage to Arthur and his knights.
* [[CrusadingWidower Crusading Widow]]
* ErmineCapeEffect
* EvilMatriarch: {{Subverted}} despite first appearances (and surprisingly, given the show's track record with evil female characters ''and'' the fact that she shares her name with an evil spirit of English folklore).
* {{Expy}}: Bears more than a passing resemblance to Boudicca.
* FieryRedhead
* TheHighQueen
* LadyOfWar
* ModestRoyalty
* ReasonableAuthorityFigure: Played with.
* TheReasonYouSuckSpeech: Delivers a particularly brutal one to Morgana, when she calmly points out that she's NotSoDifferent from Uther. All things considered, it's a miracle that Annis left that tent alive, and this was probably only down to the fact that she unsettled Morgana so profoundly.
* ProudWarriorRace
* WidowWoman: Thanks to Arthur.

!! Princess Mithian (Janet Montgomery)

[[quoteright:208:http://static.tvtropes.org/pmwiki/pub/images/592px-Mithian_s5_2_5121.jpg]]

[-"I would give up my own kingdom to be so loved."-]

The Princess of Nemeth. She comes to Camelot in order to wed Arthur as part of a peace settlement between their kingdoms. Though she finds herself genuinely falling for Arthur, he breaks off the engagement on realizing that his heart still lies with Guinevere. She appeared in ''[[{{Recap/MerlinS04E11TheHuntersHeart}} The Hunter's Heart]]'' and ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]''.

* AllLoveIsUnrequited: Even by the end of ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]'', it appears that she still has a little bit of a crush on Arthur.
* AmicableExes: With Arthur.
* BeautyEqualsGoodness
* BigEntrance: She certainly makes an impression when she first arrives in Camelot.
* BirdsOfAFeather: With Arthur, a deliberate contrast to the OppositesAttract relationship he has with Guinevere.
* BridalCarry: Leon carries her like this when [[{{Fainting}} she faints]] outside the castle.
* BurpingContest: With Arthur, or though she ''thinks'', even though it's actually Merlin deliberately trying to embarrass the two of them with magic.
* CostumePorn: Her gold and white gowns.
* DieForOurShip: ''[[invoked]]'' Merlin takes an irrational dislike to Mithian simply because he ships Arthur/Guinevere. He's notably much nicer to her when she returns to Camelot three years ''after'' Arthur and Gwen are safely married.
* DisposableFiance
* DistressedDamsel: In 5x04.
** DecoyDamsel: Though she's coerced into it by Morgana.
* DramaticUnmask: Or rather, "unveil".
* ErmineCapeEffect: She's wearing a ''massive'' white fur coat for her arrival and departure scenes.
* {{Expy}}: There's some speculation that SHE was based on the more familiar characterization of Guinevere, being both high-born and in a (temporary) ArrangedMarriage with KingArthur.
* {{Fainting}}: Of exhaustion in 5x04.
* GracefulLoser: She handles rejection well.
* HoneyTrap: In 5x04, though more in the capacity of a DistressedDamsel than a FemmeFatale.
* HourglassPlot: A slight one with Guinevere. They completely switch roles between ''[[{{Recap/MerlinS04E11TheHuntersHeart}} The Hunter's Heart]]'' and ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]''.
* ImpracticallyFancyOutfit: She travels in a white fur coat and goes hunting in a gold silk dress.
* MinorFlawMajorBreakup: Mithian's flaw is that she isn't Guinevere. In breaking off their engagement, Arthur ends up giving her the disputed lands between their kingdoms in order to avoid war.
* NiceGirl
* NiceToTheWaiter: Somewhat ironically considering Merlin often complains about his treatment at the hands of nobles - but when this one ''is'' actually nice to him, [[DieForOurShip he's too busy giving her the cold shoulder to appreciate it]].
** She's not just doing it for Arthur, either; she's just as nice to Merlin when she comes back in 5x04 and is visibly upset when her attempt to warn him about Morgana gets him nearly killed.
* PoliticallyActivePrincess
* PrincessClassic: She looks, sounds and behaves like the quintessential fairytale princess, with one striking {{subversion}}: she [[DidNotGetTheGirl Does Not Get The Guy]].
* PrincessesRule: There's no sign or mention of her parents, yet she's a princess and not a queen.
** Though her second appearance expands on her background and reveals that she does in fact have a father.
* RavenHairIvorySkin: At least in ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]'', in which Mithian's hair seems to be several shades darker than it was in ''[[{{Recap/MerlinS04E11TheHuntersHeart}} The Hunter's Heart]]''.
* RequisiteRoyalRegalia: She wears a coronet throughout ''[[{{Recap/MerlinS04E11TheHuntersHeart}} The Hunter's Heart]]''.
* RomanticFalseLead
* RomanticRunnerUp
* PerfectlyArrangedMarriage: {{Subverted}}. She and Arthur would be perfect for each other, were it not for the simple fact that he's in love with someone else.
* PrettyInMink: Wore [[http://oi45.tinypic.com/10e3dat.jpg a long white fur coat]] when she arrived in Camelot.
* ProperLady
* SatelliteLoveInterest: Notably {{subverted}}. She is brought to Camelot to join in an ArrangedMarriage to Arthur, but instead of being treated as a mere impediment to his happiness with Guinevere, she is a likeable and developed characters. Though her function ''was'' simply as a LoveInterest to Arthur, she was also a three-dimensional character who ended up being popular enough to return to the show in the next season.
* SpoiledSweet
* UnknownRival: She and Guinevere never meet.
** They do eventually meet in ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]'', but although Mithian can now put a name and face to the mystery woman that she was passed over for, it's unclear if Guinevere knows whether Mithian is anything other than a visiting princess in need of help.
* UnwittingInstigatorOfDoom: Narrowly {{averted}}. In a bid to impress Arthur, she shoots a young deer in the forest. Unbeknownst to her, the deer is actually Guinevere under an enchantment.
* [[WhatDoesSheSeeInHim What Does He See In Her?]]: She's flabbergasted when Arthur forsakes her for the blacksmith's daughter, though also seems rather impressed by his devotion.
* WomanInWhite: In her first scene she wears a [[PrettyInMink white fur coat]] and sheer white veil, designating her role as a prospective bride.
* WomanScorned: {{Subverted}}. Despite the snub, she remains on good terms with Camelot. In fact, she seems rather moved by Arthur's devotion to Guinevere - see her page quote.
* WrongGenreSavvy: She knows she's in a love story, but doesn't realize that it's not hers. As such, she spends the first half of ''[[{{Recap/MerlinS04E11TheHuntersHeart}} The Hunter's Heart]]'' acting like (and being treated as) the sole [[LoveInterest Romantic Love Interest]], only to eventually learn she was the RomanticFalseLead all along. Exit stage left.

!! King Rodor (James Fox)

[[quoteright:185:http://static.tvtropes.org/pmwiki/pub/images/RODOR_9679.bmp]]

[-"Don't look so surprised. I commanded an army in my time."-]

The King of Nemeth and father of Princess Mithian. When his kingdom is invaded by King Odin, he's held hostage and used as bait to lure Arthur into a trap. He appeared in ''[[{{Recap/MerlinS05E04AnothersSorrow}} Another's Sorrow]]''.

* BadassGrandpa
* CoolOldGuy
* DistressedDude
* TheGoodKing
* [[IHaveYourWife I Have Your Father]]: Morgana uses this ploy on Mithian.
* IWillOnlySlowYouDown: Though the unanimous response is "not a chance".
* LivingMacGuffin: What his role amounts to.
* ReasonableAuthorityFigure
* StillGotIt: A variation; see his quote.

[[/folder]]

[[folder:Other Villains]]

! Mary Collins (EveMyles)

[[quoteright:171:http://static.tvtropes.org/pmwiki/pub/images/MaryMerlin_2534.jpg]]

[-"I promise you, before these celebrations are over, you will share my tears."-]

A witch whose son is executed at Uther's behest. She decides to take her revenge by assassinating Prince Arthur, disguising herself as a singer due to arrive in Camelot. She appeared in ''[[{{Recap/MerlinS01E01TheDragonsCall}} The Dragon's Call]]''.

* ActingForTwo: Eve Myles played the elderly witch and the young woman she disguises herself as.
* CobwebJungle: Creates one when she casts her final spell.
* ColourFailure: What happens to her victims.
* CompellingVoice
* EveMyles
* EvilDiva
* FallingChandelierOfDoom
* {{Foreshadowing}}: Her forty-five minute appearance is Morgana's entire StoryArc in a nutshell, right down to her motivation (revenge), the focus of her anger (Uther and therefore Arthur by proxy) and the magical implements she uses (glamour, a whirlwind and a VoodooDoll).
* GlamourFailure: Whenever she steps in front of a mirror, her reflection is of her true self.
* LifeDrinker
* MagicMusic: Her song puts the court to sleep.
* MamaBear
* TheMirrorShowsYourTrueSelf
* NoNameGiven: [[AllThereInTheManual Except in the credits]].
* RevengeByProxy: She goes after Arthur in revenge for her own son's death.
* StarterVillain: The very first foe that Merlin has to face.

! Valiant

[[quoteright:183:http://static.tvtropes.org/pmwiki/pub/images/valiant_8135.bmp]]

A knight who enters a tournament at Camelot with a magical shield that will ensure his victory.

* TheBrute
* CardCarryingVillain
* ColorMotif: Yellow is [[GoodColoursEvilColours the colour of cowardice]], and he gives himself an unfair advantage in the tournament.
* ForTheEvulz
* HandsomeLech
* KnightInShiningArmour: {{Subverted}}
* IronicName: Valiant, he ain't.
* IKissYourHand: To Morgana
* ReptilesAreAbhorrent
* RuleOfThree: Three snakes on his shield
* PoisonIsEvil
* ShoutOut: Presumably his name is derived from ''PrinceValiant'' (an Arthurian comic strip).
* StarterVillain: Just as Mary Collins was a magical foe for Merlin to face, Valiant is Arthur's first enemy to defeat, mainly through combat.
* TryingToCatchMeFightingDirty
* VillainBall: Why would you feed your magical snakes with the door unlocked?

! Edwin Muirden (Julian Rhind-Tutt)

[[quoteright:193:http://static.tvtropes.org/pmwiki/pub/images/Edwin_8776.bmp]]

[-"I want my face to be the last face you ever see. You took my childhood from me. And now finally, I take my parents' revenge."-]

A physician whose parents were burnt at the stake at Uther's command and who returns to Camelot years later to seek his revenge. He appeared in ''[[{{Recap/MerlinS01E06ARemedyToCureAllIlls}} A Remedy To Cure All Ills]]''.

* AnAxeToGrind: He telekenetically throws one at Merlin.
* BestServedCold
* {{Blackmail}}: He gets rid of Gaius by threatening to reveal Merlin's secret.
* CreepyLongFingers: There's an emphasis on his hands; before we ever see his face, we see his hands creeping like a spider across his desk.
* CreepyPhysical
* DeadlyDoctor: He gains Uther's trust by anonymously sending flowers to Morgana with a deadly beetle concealed inside, and then healing her from the near-fatal haemorrhage it causes.
* DeathBySecretIdentity
* FriendToBugs
* GoodScarsEvilScars: The evil kind.
* InTheHood
* ManipulativeBastard
* MeaningfulName: Edwin Muir was the author of [[http://www.poemhunter.com/poem/merlin/ this Merlin-centric poem]], one which also lent the title to the two-part GrandFinale.
* PlayingWithFire: Creates a circle of fire around Gaius.
* {{Revenge}}
* SecretKeeper: To Merlin, very briefly.
* VillainWithGoodPublicity
* WeCanRuleTogether: Tries this on Merlin.

! Sophia (Holliday Grainger)

[[quoteright:196:http://static.tvtropes.org/pmwiki/pub/images/SophiaMerlin_8982.bmp]]

[-"For a moment, I felt what it would be like to die a mortal death."-]

The daughter of a renegade Sidhe, Sophia is desperate to gain immortality and return to Avalon by offering up Arthur as a human sacrifice to her people. She appeared in ''[[{{Recap/MerlinS01E07TheGatesOfAvalon}} The Gates Of Avalon]]''.

* BeautyIsBad
* BigNo: Before she dies.
* BitchInSheepsClothing
* BlondesAreEvil
* BoomStick: Her staff.
* DecoyDamsel: She and her father get themselves into Camelot by staging a RescueRomance.
* TheFairFolk
* FemmeFatale
* GoldAndWhiteAreDivine
* HoistByHisOwnPetard: Merlin uses her own staff to destroy her.
* IKissYourHand: Arthur when he first meets her.
* KissOfDeath
* MindManipulation
* RedEyesTakeWarning
* TheVamp: There doesn't seem to be any ''particular'' need to seduce Arthur (since she ends up hypnotizing him), but she does it anyway.
* [[UngratefulBastard Ungrateful Bitch]]: When Arthur saves her from a stray bolt from a crossbow, she's not remotely grateful - only bitter that she needed rescuing in the first place.
* YourHeadAsplode: Merlin blows her up. [[MoralDissonance It's a bit disconcerting]].

! Aulfic (Kenneth Cranham)

[[quoteright:209:http://static.tvtropes.org/pmwiki/pub/images/Aulfic_7595.bmp]]

[-"It is my fate to live a mortal life."-]

A member of the Sidhe who was exiled from Avalon, Aulfric promises his people the blood of Prince Arthur if they agree to return immortality to his daughter. He appeared in ''[[{{Recap/MerlinS01E07TheGatesOfAvalon}} The Gates Of Avalon]]''.

* AsYouKnow: He relates the plan to his daughter (which she knew perfectly well) in order to fill the audience in to what they're doing.
* BeardOfEvil
* BoomStick: His staff.
* TheFairFolk
* EvilLaugh
* TheExile
* LargeHam
* OverprotectiveDad
* PetTheDog: It's clear by the end that everything he's done has been to save his daughter's life, and is prepared to sacrifice himself in the process.
* RedEyesTakeWarning
* YouHaveOutlivedYourUsefulness: The bandits that he pays to stage an attack on himself and his daughter. After Arthur dispatches them, Aulfric kills the sole survivor.
* YourHeadAsplode

! Sidhe Elder (Michael Jenn)

[[quoteright:201:http://static.tvtropes.org/pmwiki/pub/images/sidheeld_9177.jpg]]

The ruler of the Sidhe. Appeared in ''[[{{Recap/MerlinS01E07TheGatesOfAvalon}} The Gates Of Avalon]]'' and ''[[{{Recap/MerlinS03E06TheChangeling}} The Changeling]]''.

* ChangelingTale: He initiates one by sending one of his subjects into the body of the infant Princess Elena.
* {{Chessmaster}}: Has organised for a Sidhe to possess Princess Elena, thus ensuring that a Sidhe Queen will one day sit on the throne of Camelot. [[FridgeLogic This poses some questions]].
* TheFairFolk
* OurFairiesAreDifferent: Blue, with pointed teeth and weird growths on their faces.
* FangsAreEvil: Even though his size might qualify them as CuteLittleFangs.
* SuddenSequelDeathSyndrome
* WingedHumanoid

! Tristan de Bois (Rick English/Christopher Fairbank)

[[quoteright:245:http://static.tvtropes.org/pmwiki/pub/images/Tristanwraith_7882.jpg]]

[-"Who will take up my challenge?"-]

Queen Ygraine's brother, who blamed Uther for her death and challenged him to a duel. Though he was killed, he swore with his dying breath that he would return to Camelot to have his revenge. Years later, Nimueh resurrects him so that he might fulfil this vow. He appeared in ''[[{{Recap/MerlinS01E09Excalibur}} Excalibur]]''.

* AnimateDead
* BackFromTheDead
* BigEntrance: He leaps on horseback through a stained glass window whilst Arthur is undergoing a ceremony to become crown prince.
** DynamicEntry
* BlackKnight
* {{Curse}}
* DramaticUnmask: Or "unhelmeting".
* DuelToTheDeath
* TheFaceless: Until TheReveal at the end of the episode.
* ForgottenFallenFriend: Three seasons later, Agravaine never once brings up the subject of his dead brother.
* ImplacableMan
* OurZombiesAreDifferent
* {{Revenge}}
* ShoutOut: His role is highly reminiscent of ''[[SirGawainAndTheGreenKnight The Green Knight]]'' in Arthurian Legend.
* ThrowingDownTheGauntlet
* UndeathAlwaysEnds

! Catrina (Sarah Parish)

[[quoteright:182:http://static.tvtropes.org/pmwiki/pub/images/cat_3928.bmp]]

[-"Uther's so stupid, so blinded by pretty things. Already he falls for me. It's only a matter of time before he is completely under my control."-]

A hideous troll that takes on the visage of an old friend of Uther in order to seduce him. On becoming Queen of Camelot, she uses her newfound power to accumulate her deepest desires: riches and dung. She appeared in ''[[{{Recap/MerlinS02E05BeautyAndTheBeastPartI}} Beauty and the Beast Part I]]'' and ''[[{{Recap/MerlinS02E06BeautyAndTheBeastPartII}} II]]''.

* AlienBlood
* BeautyIsBad
* BitchInSheepsClothing
* ElephantInTheLivingRoom: Once she reverts back into her true form, and everyone but Uther can clearly see it.
* GodSaveUsFromTheQueen
* HypnoTrinket: How she controls Uther.
* ImpostorForgotOneDetail: Gaius suspects her because the real Catrina had a rare bone condition.
* LovePotion
* MayDecemberRomance: With Uther.
* OurTrollsAreDifferent

! Aredian (Creator/CharlesDance)

[[quoteright:173:http://static.tvtropes.org/pmwiki/pub/images/aradien_8359.bmp]]

[-"It's all around us, the foul stench of sorcery. It's infected your great city like a contagion."-]

A [[TheWitchHunter Witch Finder]], who comes to Camelot at Uther's invitation in order to root out any witches or wizards in the kingdom. Due to Charles Dance's performance, he ended up being one of the show's most memorable [[OneShotCharacter One Shot Villains]]. He appeared in ''[[{{Recap/MerlinS02E07TheWitchfinder}} The Witchfinder]]''.

* BadassLongcoat
* DisneyVillainDeath: He trips backwards and falls out of a high window.
* TheDreaded
* FalseConfession: He extracts them from his victims.
* {{Frameup}}: Of Gaius.
* FramingTheGuiltyParty
* ManipulativeBastard
* NiceHat
* TheWitchHunter

! Alvarr (Joseph Mawle)

[[quoteright:209:http://static.tvtropes.org/pmwiki/pub/images/Alvarr_5043.jpg]]

[-"To be an enemy of Camelot is no crime."-]

The leader of a group of Druids that desires the downfall of Uther and who manipulates Morgana (and Mordred) into joining his cause. He appeared in ''[[{{Recap/MerlinS02E11TheWitchsQuickening}} The Witch's Quickening]]''.

* AllGirlsWantBadBoys: He works this angle on Morgana.
* AlmostKiss: With Morgana. Later he kisses her on the cheek.
* BattleCouple: With his girlfriend, Enmyria.
* BecomingTheMask: Though he's clearly playing Morgana at first, director Alice Troughton (on the DVDCommentary) insists that Alvarr was genuine about his feelings for her by the end of the episode (though KatieMcGrath didn't seem quite as convinced).
* GreyAndGreyMorality: He's genuinely devoted to his cause, and seems legitimate in his fondess for Enmyria and Mordred, but is obviously not above manipulating everyone for his own ends.
* HandsomeLech
* ManipulativeBastard
* ParentalSubstitute: To Mordred.
* PlayingPossum: What he's doing the first time we see him.
* WhatHappenedToTheMouse: Or possible ShooOutTheNewGuy considering Alvarr is set up as a fairly important figure in the conflict between Druids and Camelot, but is never seen or refered to again.

! Julius Borden (James Callis)

[[quoteright:186:http://static.tvtropes.org/pmwiki/pub/images/brd_5497.bmp]]

An old pupil of Gaius who left his tutelage under murky circumstances. Since then, he gradually collected the three pieces of a golden triskelion that is said to open the Tomb of Askanar where the final dragon egg was hidden centuries ago.

* AffablyEvil
* DarkAndTroubledPast: Not that we learn much about it.
* DeceptiveDisciple: To Gaius.
* LeftForDead: Merlin leaves him to die in a CollapsingLair.
* ManipulativeBastard
* NeverFoundTheBody
* PermaStubble
* SufferTheSlings
* TamperingWithFoodAndDrink: He uses a slingshot to fire a satchet of poison into the knight's cooking pot.

! Lamia (Charlenne [=McKenna=])

[[quoteright:175:http://static.tvtropes.org/pmwiki/pub/images/ThisLamia_937.bmp]]

[-'''Gaius''': "They could control the mind of a man, suck the life from him with a single embrace."-]

A creature of dark magic, created by the High Priestesses of the Old Religion as a weapon against the Ancient Kings by mingling the blood of a girl and a serpent together. She appeared in ''[[{{Recap/MerlinS04E08Lamia}} Lamia]]''.

* AdaptationalVillainy: In the myths, not all lamia were evil.
* BrainwashedAndCrazy: Her powers render the Knights as this.
* BitchInSheepsClothing
* CharacterTitle
* CharmPerson
* EldritchAbomination: Lamia's true form.
* DecoyDamsel
* GoneHorriblyRight: The Priestesses made the lamias as a weapon, only to lose control of them.
* GreenEyes
* HatePlague: Her magic infects the knights like this.
* OneGenderRace
* ShapeshiftingSeducer
* {{Succubus}}
* SupernaturalIsPurple
* TheVamp
* VoluntaryTransformation
* WoundedGazelleGambit

! Lancelot du Lac (Santiago Cabrera)

[[quoteright:216:http://static.tvtropes.org/pmwiki/pub/images/tumblr_lvmli8guq01r16r9jo1_500_1190.jpg]]

A shade resurrected from the dead by Morgana in order to tear Arthur and Guinevere apart. Though it bears an exact resemblance to Lancelot, his will is entirely controlled by Morgana. Appeared in ''Lancelot du Lac''.

* BackFromTheDead
* {{Brainwashed}}
* CameBackWrong
* DeadPersonImpersonation
* DrivenToSuicide: On Morgana's command.
* DueToTheDead
* DyingAsYourself: There's one last glimpse of the real Lancelot before Merlin cremates his body.
* GoSeduceMyArchnemesis: Is what Morgana commands him to do (though she has no romantic/sexual interest in him herself).
* HandsomeLech
* KissingUnderTheInfluence: With Guinevere.
* LonelyFuneral: Only Merlin attends.
* NakedOnArrival: Presumbably.
* NewOldFlame: To Guinevere.
* NoHoldsBarredBeatdown: With Arthur, after his tryst with Gwen.
* PaintItBlack: Morgana dresses him in matching black.
* RelationshipSabotage
* SoullessShell
* SpotTheImposter
** ImposterForgotOneDetail: Merlin [[BluffTheImposter figures him out]] by framing a sentence that leads him to stating that he has no idea Merlin has magic.
* VikingFuneral

! Ruadan (Liam Cunningham)

[[quoteright:195:http://static.tvtropes.org/pmwiki/pub/images/mer_-_Copy_9409.jpg]]

A powerful druid who allies himself with Morgana in order to topple the Pendragon regime, informing her of a mysterious entity called the Diamir that holds the key to all knowledge.

* DyingMomentOfAwesome: He has a magnificent death scene, perhaps one of the best on the entire show, in which he single-handedly rescues his daughter from a guarded citadel before succumbing to his wounds.
* EvilSorcerer
* FlashStep: Pulls off one of these when Sefa comes to bring him information.
* GreatEscape: Pulls one off for Sefa.
* PetTheDog: His cold demeanour slips a bit when he talks with his daughter.
* PlayingWithFire: Conjures up a line of fire to facilitate his escape.
* StormingTheCastle: All by himself.
* TravellingAtTheSpeedOfPlot: He gets around quickly.
* WellIntentionedExtremist
* YourTerroristsAreOurFreedomFighters: He seems genuine about the nobility of his cause, clearly isn't taking sadistic enjoyment in taking lives, and truly loves his daughter.

! Kara (Alexandra Dowling)

[[quoteright:193:http://static.tvtropes.org/pmwiki/pub/images/kara_9814.bmp]]

[-"It is not a crime to fight for your freedom. It is not a crime to fight for the right to be who you are."-]

A druid girl who joins forces with Morgana in order to destroy Camelot and free her people. After trying to assassinate Arthur she is sentenced to death, but her history with Mordred complicates matters. She appeared in ''[[{{Recap/MerlinS05E11TheDrawingOfTheDark}} The Drawing of the Dark]]''.

* ChildhoodFriendRomance: With Mordred.
* DefiantToTheEnd: She refuses to repent of her crimes against Camelot, and on both occasions in which Arthur sentences her to death, she rejoices in his own impending doom.
* DisposableWoman: Ultimately, she's used as the reason for Mordred turning against Arthur and Merlin.
* FaceDeathWithDignity
* GreyAndGreyMorality: She honestly believes that Arthur is a tyrant and that what she's doing is right.
* HeadbuttOfLove: With Mordred.
* HonorBeforeReason: She choses to die rather than repent of actions that she doesn't believe are crimes.
* IKissYourHand: She kisses Mordred's hand before going to her death.
* InTheHood
* KnifeNut
* LastSecondChance: Arthur offers her one. She rejects it.
* PlotTriggeringDeath: It begins the DisasterDominoes that lead into the two-part GrandFinale.
* PublicExecution
* TheReasonYouSuckSpeech: Gives one to Arthur, reminding him of his maltreatment of her people.
* SmallRoleBigImpact
* WoundedGazelleGambit: To get close enough to Arthur.
* WellIntentionedExtremist
* YourTerroristsAreOurFreedomFighters: How she sees herself.
** WouldNotShootACivilian: Heavily averted. She considers ''everyone'' in Camelot to be a legitimate target and has no remorse over killing them. Arthur, a firm believer in TheLawsAndCustomsOfWar considers this to be unforgiveable.
*** Though technically she never actually harms a civilian. She helps attack a convoy of soldiers that was delivering weapons to Camelot, and later kills a castle guard that was preventing her escape. See GreyAndGreyMorality.

! Eira

A devious woman (yeah, another one) who is sent by Morgana to infiltrate Camelot as a spy, using her feminine wiles and a show of helplessness to gather information. She appeared in ''[[{{Recap/MerlinS05E12TheDiamondOfTheDayPartI}} The Diamond of the Day Part I]]'' and ''[[{{Recap/MerlinS05E13TheDiamondOfTheDayPartII}} II]]''.

* BeautyIsBad
* BitchInSheepsClothing
* BlondesAreEvil
* DecoyDamsel
* HoneyTrap
* InnocentBlueEyes: Which she uses to great effect.
* LastEpisodeNewCharacter
* MataHari
* RescueRomance: With Gwaine. {{Subverted}}.
* TheVamp

[[/folder]]

[[folder:Other Allies]]

! Will (Joe Dempsie)

[[quoteright:178:http://static.tvtropes.org/pmwiki/pub/images/will_1826.bmp]]

[-"Are you telling me you'd rather keep your magic a secret for Arthur's sake than use it to protect your friends and family?"-]

Merlin's ChildhoodFriend who remains in Ealdor after Merlin travels to Camelot. He participates in the battle against the local warlord Kanen to defend his home. He appeared in ''[[{{Recap/MerlinS01E10TheMomentOfTruth}} The Moment of Truth]]''.

* BackToBackBadasses: With Merlin
* ChangedMyMindKid
* ChildhoodFriends: With Merlin
* TheComplainerIsAlwaysWrong
* ForgottenFallenFriend: He's never mentioned again after his one and only episode.
* HeroicSacrifice
* ManHug: With Merlin
* MuggleBestFriend
* SacrificialLamb
* ScrewThisImOuttaHere
* SecretKeeper
* UnluckyChildhoodFriend: In the platonic sense. (Maybe).

! Alice (Pauline Collins)

[[quoteright:196:http://static.tvtropes.org/pmwiki/pub/images/alice_2263.bmp]]

[-'''Gaius''': "Alice is the kindest and most compassionate person I've ever known."-]

A gifted healer who suppliments her natural talent with magic. She and Gaius were once engaged to be married before the Great Purge forced her to flee Camelot. She appeared in ''[[{{Recap/MerlinS03E09LoveInTheTimeOfDragons}} Love In The Time of Dragons]]''.

* BittersweetEnding: She escapes with her life, but she and Gaius are parted - presumably for good.
* CuteWitch: So what if she's over sixty? Look at her! She's still adorable.
* HealingHands
* InformedAbility: Gaius states that she's more powerful and naturally gifted than he is, but she spends the entire episode under the thrall of the Manticore. Furthermore, all her renowned healing abilities happen off-screen.
* TheMedic
* MindControlEyes
* NewOldFlame: To Gaius.
* PetMonstrosity: The Manticore
* DecemberDecemberRomance: With Gaius

! Gilli (Harry Melling)

[[quoteright:209:http://static.tvtropes.org/pmwiki/pub/images/GILLI_428.bmp]]

[-"I'm not going to apologize for who I am!"-]

A young man with a RingOfPower who arrives in Camelot in search of honour and glory. After befriending Merlin, he goes through a surprisingly complex StoryArc over the course of his single episode appearance. He appeared in ''[[{{Recap/MerlinS03E11TheSorcerersShadow}} The Sorcerer's Shadow]]''.

* ARealManIsAKiller: Suffers from this delusion. When he actually goes through with killing someone, he finds it's not at all to his liking.
* BrokenPedestal: {{Inverted}} in regards to his father. He begins by remembering him as a weak man who never used his abilities to their full extent, but eventually comes to a fuller understanding of how he lived his life.
* CastingGag: Harry Melling is best known as playing a magic-fearing Muggle in the ''Film/HarryPotter'' films.
* DudeWheresMyRespect
* {{Foil}}: To Merlin
* IJustWantToBeSpecial
* ItsAllAboutMe: ZigZaggingTrope. He makes plenty of decisions over the course of the episode, both selfish and unselfish.
* MagicRing
* MyGodWhatHaveIDone: After killing Nollar.
* SecretKeeper: To Merlin.
* TearsOfRemorse: When Merlin demonstrates his magical powers to him.
* WhipItGood: In defending Merlin from bullies.

! Alator (Gary Lewis)

[[quoteright:234:http://static.tvtropes.org/pmwiki/pub/images/6_5_7721.jpg]]


A HighPriest of the Catha, a sect of wizards who specialize in mind control and psychic torture. Alator is hired by Morgana to seek out the identity of the mysterious "Emrys." He appeared in ''[[{{Recap/MerlinS04E07TheSecretSharer}} The Secret Sharer]]'' and ''[[{{Recap/MerlinS05E10TheKindnessOfStrangers}} The Kindness of Strangers]]''.

* TheAtoner: He refers to his days as a torturer as "not something to be proud of" in his second appearance.
* BadassLongRobe
* BaldOfAwesome
* TheBusCameBack: He returns in ''[[{{Recap/MerlinS05E10TheKindnessOfStrangers}} The Kindness of Strangers]]''...
** BackForTheDead: ... only to be killed by Morgana.
* DefiantToTheEnd
* EvilSorcerer: {{Subverted}}
* FaceDeathWithDignity: Morgana, despite all her efforts, never does manage to break him and he tells her to her face that no matter what she does, she will never find Emrys and he will pass to the other world happy in the knowledge that she will be defeated no matter what she does.
* HeelFaceTurn: Sort of. He's actually a fairly neutral chracter, though we're initally led to believe that he's an EvilSorcerer in league with Morgana. On finding out that Merlin is the mysterious Emrys, he declares his loyalty to him.
* HighPriest
* KneelBeforeFrodo: Or in this case, Merlin.
* MagicStaff
* NeckSnap: How Morgana kills him.
* NotAfraidToDie: Explicitly so.
* PlayingWithFire
* PurpleIsPowerful: He wears purple robes.
** SupernaturalIsPurple
* SecretKeeper: One of the few who discovers Merlin's secret and survives to keep it ([[BackForTheDead at least until his second appearance]]).
* SuddenSequelDeathSyndrome
* SurprisinglySuddenDeath
* TortureTechnician: Morgana hires him to extract information from Gaius.
* ViolentGlaswegian
* WarriorMonk
* WeWillMeetAgain: To Merlin. {{Inverted}} in that he doesn't mean it as a threat. And then {{subverted}} considering they never do.
* YouAreNotAlone: Says this to Merlin.

! Tristan and Isolde (Ben Daniels and Miranda Raison)

[[quoteright:216:http://static.tvtropes.org/pmwiki/pub/images/35-1_6632.jpg]]

[-"Caught? Tristan and Isolde? I don't think so. We're too quick and too smart for the halfwit king in Camelot."-]

A pair of smugglers (and lovers) who don't think highly of Camelot or its King, but who decide to throw in their lot with Arthur after he and Merlin save Isolde's life. They appeared in ''[[{{Recap/MerlinS04E12TheSwordInTheStonePartI}} The Sword in the Stone Part I]]'' and ''[[{{Recap/MerlinS04E13TheSwordInTheStonePartII}} II]]''.

* ActionGirl: Isolde fluctuates between this and a FauxActionGirl before being [[spoiler:KilledOffForReal]].
* BackToBackBadasses: See picture.
* BadassLongcoat: Tristan
* BattleCouple
* BetaCouple: They serve as the catalyst for getting Arthur and Gwen back together..
* [[CheshireCatGrin Cheshire Cat Grins]]
* TheCynic: Tristan
* [[EleventhHourRanger Eleventh Hour Rangers]]
* {{Expy}}: According to writer Julian Jones, they are based on ''MrAndMrsSmith''.
* GoodBadGirl: Isolde
* [[LovableRogue Lovable Rogues]]: They give this vibe.
* MayDecemberRomance: No onscreen ages are given but Tristan certainly ''looks'' considerably older than Isolde (in real life there is a 16 year age gap between Ben Daniels and Miranda Raison).
* OutlawCouple
* Literature/TristanAndIseult: InNameOnly
* UglyGuyHotWife: Comparatively speaking.
* [[UnexpectedCharacter Unexpected Characters]]: All things considered, their appearance in the show was a bit random.
* [[spoiler: VasquezAlwaysDies]]: Isolde
[[/folder]]

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