!Mercedes "Mercy" Thompson [[spoiler:Hauptman]]
The protagonist and narrator of the main series. Mercy is a walker - a Native American shapeshifter. She can turn into a coyote at will, and has a few other abilities, such as enhanced senses even in human form.
* ActionGirl
* ADegreeInUseless: DoubleSubversion. She has a degree in history...which she doesn't make money with. However, when you hang out with as many long-lived beings as Mercy does, a degree in history is necessary just to keep up.
* AllGirlsWantBadBoys: Played with. Mercy isn't particularly attracted to dangerous men, but she finds it adds to Adam's appeal.
* BadLiar: But a decent rules lawyer, thanks to growing up around a bunch of werewolves who can smell lies.
* BerserkButton: Doesn't really have one, but she ''is'' one for a bunch of people - Adam, Samuel, Bran, Zee, and Stefan. Hurt her, and you will soon meet a messy and painful death.
* BewareTheNiceOnes: The number of people who have underestimated Mercy and lived to tell the tale is a very, very short list.
* CarFu: Took out an attacking werewolf by tricking them into chasing her across a road... right in front of an oncoming bus.
* CombatPragmatist: When you fight above your weight class as often as she does…
* CompanionCube: Acquires a fae-crafted walking stick that follows her around like a puppy and shows up at opportune times. [[spoiler: It was actually made by Lugh himself. In ''River Marked'' Mercy turns it into a spear to kill the [[EldritchAbomination River Devil]] with, which adds a very dangerous and bloodthirsty slant to its powers. She ends up giving it to Coyote, but it comes back to her after a while.]]
* DeadpanSnarker: Especially to werewolves and people who give her orders.
* DidYouJustPunchOutCthulhu: Has a tendency to dramatically shorten the life expectancies of very powerful, very old monsters.
* {{Determinator}}
* [[spoiler: HappilyMarried]]
* HumanMomNonhumanDad: [[spoiler: When your dad's Coyote…yes, ''[[TricksterArchetype that]]'' [[TricksterArchetype one.]] ]]
* IndyPloy: Favors these, though she ''does'' know how to plan.
* ISeeDeadPeople
* NeverHeardThatOneBefore: ''Mercedes'' the Volkswagen mechanic.
* NeverLiveItDown: Her take on the time she peanut-buttered Bran's pants as a teenager. Since the first thing any new werewolf she meets does is bring it up, she's going to be hearing it for a long time.
* ObfuscatingStupidity: Occasionally plays this card on the villains, doesn't usually bother with people she knows and likes.
* OddCouple: With Adam. She's the messy, carefree, rules-bending one.
* PalsWithJesus: [[spoiler: Coyote]] from Native American myth likes to drop in and see her on a regular basis. [[spoiler: Well, she is his daughter]].
* RaisedByWolves: Well. Werewolves, anyway.
* RebelliousSpirit: Might be a side effect of being the daughter of [[spoiler: Coyote. And yes, we mean ''the'' [[TricksterArchetype Coyote]].]]
* RememberWhenYouBlewUpTheSun: As a kid, she tricked Bran into sitting in peanut butter as revenge when he made her stepmother cry. Bran is one of the largest supernatural heavyweights in the series, is considered TheDreaded by pretty much everyone, and actually has killed people for less. The story has spread far and wide and given her quite a rep in the supernatural community.
* SecretLegacy: [[spoiler: Did we mention her [[RunningGag father is Coyote?]] ]]
* SheCleansUpNicely: This is Mercy's assessment of her looks- if she puts effort into it, she can be pretty but most of the time she's working her job as a mechanic in greasy sweats with her hair pulled back and oil stains up to her elbows. Many of the people who know her think that she's selling herself short.
* SingleWomanSeeksGoodMan
* ThoseWilyCoyotes: Turns into a coyote, of course. And is quite wily, as many of her foes would tell you. If she didn't leave most of them dead.
* UselessSuperpowers: Not exactly, but her magic resistance never seems to kick in on the really dangerous stuff, and compared to the werewolves she lives around, shifting into a normal 30-lb. coyote isn't exactly jaw-dropping.
** Her ability to "break the rules" is starting to become more relevant as of ''Frost Burned,'' when it lets her [[spoiler: prevent Adam's HeroicSacrifice by sucking the silver in him (and the pack) into herself via magic.]]
** She has a better sense of smell and is able to move slightly faster (when necessary) than normal humans, however.
* WalkingDisasterArea: Due to being the daughter of [[spoiler: [[OverUsedRunningGag Coyote]] ]], trouble on a ridiculous scale tends to follow her around. Due to who's daughter she is, she's astoundingly good at surviving by the skin of her teeth. Her enemies, not so much.
* WickedStepmother: Averted. Jesse ''loves'' Mercy since she was a combination of surrogate mother and big sister to her for years after Adam divorced Jesse's mom.
* WillTheyOrWontThey: With Adam. [[spoiler: TheyDo.]]
* WrenchWench: Fixes cars for a living.

!Adam Hauptman
Mercy's neighbor and Alpha of the Columbia Basin werewolf pack. There is romantic tension between the two over the first three books. [[spoiler: They become mated in ''Bone Crossed'', and married in ''River Marked''.]] He became a werewolf during the Vietnam War, and now runs a private security firm.
* AuthorityEqualsAsskicking: Successfully defended his position while suffering from unhealed ''third-degree burns'' on his feet and hands.
* BadassInANiceSuit: Frequently, because of his job.
* BerserkButton: Has several, specifically Mercy and his daughter Jesse. Do ''not'' punch them.
* CompellingVoice: Comes with being an Alpha.
* ControlFreak: Comes part and parcel with being an Alpha werewolf.
* DotingParent: He really does love his daughter more than life itself.
* GoshDangItToHeck: Grew up in the 50's, and does not appreciate swearing. From him, profanity is ''always'' a PrecisionFStrike.
* HairTriggerTemper: Notoriously, especially where his family or pack is concerned. It took half the pack to keep him from killing some kids who bullied Jesse.
* [[spoiler: HappilyMarried]]
* HollywoodAtheist: Averted. Much like [[Franchise/TheChroniclesOfRiddick Richard B. Riddick]], he absolutely believes in God…and absolutely hates him for some of the things he's been through.
* IJustWantToBeNormal: Has accepted his werewolf nature…but still considers himself a monster. Mercy disagrees.
* ImprobableAge: In-universe. Adam is considered the fourth best fighter of all the werewolves in North America, after only Bran, Charles, and Asil (in that order) despite being only in his 60s. By comparison, Charles is well over 200 years old, Asil is somewhere around one thousand, and Bran was born before Christianity had spread to most of Europe.
* ManipulativeBastard: Especially in early books. He's not above punching Mercy's buttons to get the reaction he wants.
* NeatFreak: To the point where Mercy used to yank his chain by taking tires off the parts car in ''her'' backyard.
* OddCouple: With Mercy. He's the control-freak, neat-freak member of the pair.
* OverprotectiveDad: He's working on it. Slowly. Very slowly.
* PapaWolf: ''Literally''.
* UnstoppableRage: Did we mention that getting him angry is semi-suicidal?
* [[LastGirlWins Last Guy Wins]] : He's the second guy for Mercy, Sam is the first.

!Jessica "Jesse" Hauptman
Adam's daughter and one of Mercy's best friends. Regularly seen with hair colors that shouldn't occur in real life thanks to her fondness for hair dye.
* BadassAdorable: Let's just say she's got her father's backbone, to the point where she was willing to walk into a Faery Queen's home to help save her boyfriend.
* DaddysGirl
* HumanMomNonhumanDad
* LittleMissSnarker: Especially around Mercy.
* PluckyGirl
* ThePollyanna

!Dr. Samuel Cornick
The Marrok's son and the pack doctor. He and Mercy were once an item, when Mercy was a teenager. He's the other third of the love triangle between her and Adam, and becomes her roommate. He's also much older than he appears.
* DeadlyDoctor: He prefers saving life to taking it. Doesn't mean he's not ''very'' good at taking it.
* DrivenToSuicide: Not quite, thanks to Mercy and Adam. But way too close for comfort.
* IHaveManyNames: Samuel Branson, Samuel Marrokson, Samuel Avenger, Samuel Whitewolf…
* ManipulativeBastard: Unsurprising, given his age and parentage.
* OlderThanTheyLook: He's nearly as old as his father…who is [[ReallySevenHundredYearsOld very old indeed,]] and therefore ''centuries'' older than his brother Charles. Despite the age gap, the brothers have a good relationship.
* WalkTheEarth: Did this for a time, while pining for [[spoiler: Mercy.]]
* WhoWantsToLiveForever: Suffers from this up until [[spoiler: he's reunited with his long-lost love Ariana in ''Silver Borne.'' They later become mated, and as of ''Fire Touched'' have gotten married.]]

!Darryl Zao
Adam's second, with a day job as a professor at the local college.
* AmbiguouslyBrown: His parents are African-American and Chinese respectively. Mercy labels him as "exotic."
* GeniusBruiser: Has a Ph.D in Chemistry, teaches at the local college, and is one of the people in the pack that nobody wants to piss off.
* HappilyMarried
* NotThatKindOfDoctor
* RealMenCook: Breakfasts cooked by Darryl are considered a pack treat. He fresh-squeezes his own orange juice, and gets very testy if you say you don't like it.

!Ben Shaw
A refugee from a British pack, who left after being accused of a string of brutal rapes. Initially something of a creepy misogynist, he mellows out a little under Adam and Mercy's care and prodding. Also serves as the pack's tech expert.
* CountryMatters: One of his favorite profanities, at first, until Adam makes him shut his mouth.
* DeadpanSnarker
* HeManWomanHater: Is initially extremely hostile to Mercy, including sexist profanity. Over the course of the books, he's toned it way down, and become one of Mercy's friends…but she still wouldn't trust him alone with her sisters.
* JerkWithAHeartOfGold: Ben may be woman-hating, crude, and snarky…but he's thrown himself in front of bullets for Adam, and risked death and humiliation [[spoiler: to talk sense into Adam after Mercy's rape, by revealing his own history of being molested as a child.]] He's also run into fire—literally—to try and save Mercy.
* RapeAsBackstory: Was accused of a series of rapes back in England that stopped when he left, but Adam vouches for the fact that he didn't do it. [[spoiler: Also, was molested by his father as a child while his mother did nothing to stop it, which contributes to his misogyny and crudity.]]

Adam's third, one of Mercy's best friends, and former lone wolf until Adam took him under his wing and into his pack. One of the few gay werewolves alive, due to the nasty combination of prejudice with wolf instincts. Currently in a relationship with divorce lawyer Kyle.
* BadassGay
* BewareTheNiceOnes: He may very well be the nicest werewolf in the books outside of Anna. But don't mistake that for weakness…
* ColdBloodedTorture Suffers this in ''Blood Bound,'' to the point where he looks more like meat than a person. He gets better.
* CrouchingMoronHiddenBadass: Likes to play up the "dumb cowboy" angle…and survived over a hundred years of violent discrimination through sheer toughness and badassery.
* GayCowboy: Very literally.
* HeterosexualLifePartners: With Adam, oddly enough.
* [[KnightInShiningArmor Knight in a Shining Cowboy Hat]]: Mercy's first interaction with him is watching him help a battered wife escape from her husband…then using his werewolf nature to scare the ever-loving shit out of said abuser.
* ManlyGay: Gay werewolf.
* StraightGay: This too.
* TeamDad

!Stefan(o) Uccello
Probably the least evil vampire around (vampires are always evil), and a friend of Mercy's. Has a van painted like Scooby Doo's Mystery Machine. A major character in Blood Bound and one of Mercy's only nearly normal friends.
* AffectionateNickname: Mercy calls him "Shaggy" on occasion, referring to his ScoobyDoo obsession.
* ColdBloodedTorture: Suffers this at the hands of his seethe's Mistress, in order to test his loyalty.
* CoolSword: Can conjure one apparently out of thin air.
* CrouchingMoronHiddenBadass: Played kind of dorky and unthreatening pretty well especially before his HeroicBSOD, keeping most of his powers under lid.
* EarnYourTitle: He's known among the vampires as "The Soldier", for both is loyalty and military prowess.
* TheFettered
* FriendlyNeighborhoodVampire: Tries very hard to be this, complete with a van painted as the Mystery Machine from ScoobyDoo.
* GratuitousItalian: Sometimes reverts to his native language when he's angry, upset or otherwise emotional.
* HeroicBSOD: Has an extended one after his torture and exile at Marsilia's hands. Hasn't quite gotten over it.
* HonorBeforeReason: Unfailingly loyal and tries his damnedest to hold onto his personal code of honor, even when it costs him dearly. See TheFettered above.
* OlderThanTheyLook: Looks about twenty, was born in Renaissance Italy.
* ShipTease: While he's never been presented as a real contender for Mercy's affections, his feelings for her have been made rather clear and there is subtext and hints galore if one chooses to grab a hold of them.
* TeleportersAndTransporters: His main vampiric power. He can also teleport other people with him, but it's very taxing on him.

!Siebold "Zee" Adelbertsmiter [[spoiler: aka "The Dark Smith of Drontheim."]]
Some sort of German fae who has metalworking magic [[spoiler:He's not actually German]]. Calls himself a gremlin, though he is much older than the term. Taught Mercy most of what she knows about cars, then sold her his shop. Comes in and runs it for her when she has other business.
* TheAtoner: Implied. Something happened to make him stop being the kind of fae that older werewolves fear, and become the grouchy old man Mercy loves.
* BadassGrandpa: Appears to be an older man when the glamour is on, is very, very old, and has a grown son…and is given a great deal of respect even by the Grey Lords of the fae.
* CoolOldGuy
* CoolSword: Well, cool knife, really. It can change sizes and cut through pretty much anything, at the cost of growing hotter with each cut.
** As of Frost Burned, it turns out he has a collection, many of which are quite nasty because he made them when he was in a terrible state of mind.
* TheDreaded: Asil, who qualifies as TheDreaded himself, is absolutely terrified of Zee.
* TheFairFolk
* GratuitousGerman
* LoopholeAbuse: Is a master, as befitting a member of the fae.
* MeaningfulName: Well, we're pretty sure he ''killed'' Saint Adelbert, so...
* NamesToRunAwayFromReallyFast
* ShroudedInMyth: Nobody's sure exactly what Zee's done…but it probably involved killing Saint Adelbert, and earning the title "The Dark Smith of Drontheim."

!Bran Cornick, aka the Marrok
Leader of all the werewolves in North America. Mercy was raised in his pack. Believed to be slightly psychic. Is something of a father figure to Mercy, including scolding her when she does something stupid. [[spoiler:Has a seriously dangerous side to him called the [[SuperpoweredEvilSide Berserker]] that inspired the Grendel and many other monsters, which he is at pains to keep locked away at all times. It is revealed in Alpha & Omega that he was born a witch with the power of telepathy but after his mother, who controlled him for so long, was killed part of his power was taken away so he can only send messages not receive them.]]
* AuthorityEqualsAsskicking: All of the mighty werewolves in North America, he is both TheLeader and the mightiest.
* TheBerserker
* FalseInnocenceTrick: Loves to stuff all his power and dominance away, only to unleash it when he really needs it.
* ImmortalImmaturity: Averted. While he may look like a twenty-year-old, and pretend to act like one when it suits him, no one would knowingly accuse him of being less than mature.
* KingIncognito: Very few people outside his pack and his close friends actually know what Bran looks like, something he uses to great advantage on occasions when he wants to deal with something personally rather than have Charles take care of it.
* LivingLegend: He was the basis for Grendel.
* ManipulativeBastard: In spades. Often crosses over with TheChessmaster.
* MysteriousPast: Largely. We do know that he knew the real King Arthur, and inspired the character of Grendel in ''Beowulf.''
* NamesToRunAwayFromReallyFast
* PapaWolf: As much so, if not more than Adam.
* OlderThanTheyLook: Crossing over with ReallySevenHundredYearsOld. Bran looks like he's a college student. In reality, nobody knows how old he is, even his sons…but they know he's old enough to know King Arthur.
* {{Omniglot}}: Bran speaks Welsh, Salish, and English. And given [[ReallySevenHundredYearsOld his age]] plus the fact that he's ''[[MysteriousPast Bran]],'' he almost definitely knows more languages.
* OohMeAccentsSlipping: When he's feeling a particularly intense emotion, his accent tends to slip back to his native Welsh.
* SleepingSingle: He and his wife Leah have a...difficult relationship and sleep in separate bedrooms, but they don't have a [[SexlessMarriage sexless marriage]].
** Leah knows she can't measure up to Charles' mother, Bran's mate who was the love of his life, and is (rightfully) bitter about it, but is still a rather unpleasant person. Their situation is made more poignant by Bran's reason for choosing her as his mate - he needs the stabilization of a mate bond because of [[TheBerserker his past]] but is terrified to lose someone he loves again, so he chose someone who is shallow and unkind. [[spoiler: It's eventually revealed that despite his intentions he still has feelings for her, even if he tries not to show them]].
* UnstoppableRage: To the point where even fae lords are afraid of pissing him off.

!Charles Cornick
Sam's brother and Bran's younger son. Native American, born to a magical mother [[spoiler: and father]] and thus has inherited some of her abilities. He's the also the Marrok’s accountant, second-in-command, and preferred hitman.
* BeneathTheMask: With the mask on, he's a stone-cold killer who answers to no one but the Marrok. Under it, he's a talented musician and loving husband who deeply regrets the lives he has to take for the good of the packs.
* BloodKnight: Averted. He may be his father's killer, but it doesn't mean he enjoys fighting. In reality, Charles would love to settle down peacefully in Montana and not kill anyone.
* CruelToBeKind: Runs into this frequently. He's the one that the Marrok sends to hunt down and kill disobedient or out-of-control wolves…in order to save the packs and the mortal world from the dangers of an unrestrained werewolf.
* TheDragon: For the Marrok, he is the enforcer.
* EmbarrassingNickname: Two, from his grandfather: "He Who Must Run Into Trees" and "Running Eagle." [[spoiler: A.K.A. "Too Dumb To Fly."]]
* GeniusBruiser: When he's not out playing hit man, he's also his father's accountant and computer expert.
* GoodIsNotNice: Have we mentioned that he's his father's enforcer? But the alternative is almost always much, much worse.
* HappilyMarried: To Anna. He's a loving family man when he's off the clock.
* HatesBeingTouched: Unless you're Anna. Then he can't get enough.
* IAmWhatIAm: Eventually comes to terms with the fact that while he ''is'' a killer, he is also ''justice,'' and necessary for the wolf packs to function.
* InsecureLoveInterest: Worries constantly about whether or not his job makes him an unsuitable mate for Anna.
* LightningBruiser: Considered to be the fastest, toughest, and most skilled of all the wolves in combat, save maybe the Marrok. It comes from having a lot of experience.
* LoveAtFirstSight: With Anna, sort of. His wolf chose her instantly, and it didn't take the man long to follow.
* OlderThanTheyLook: While his father and brother are both [[ReallySevenHundredYearsOld very, very old]], he was born around 1813 and looks to be in his late twenties to early thirties (as with all werewolves).
* ScarilyCompetentTracker: It's implied that it's impossible to evade Charles when he's on the hunt.
* StrongFamilyResemblance: Subverted. While Samuel looks much Welsh like his father, Charles takes after his Native American mother.
* TheStoic: Averted with Anna, who gets to see the much softer side under the hit-man mask. Played straight with everyone else; it's probably a bad idea for the Marrok's hatchet man to be anything else.
* ZeroApprovalGambit: Is willing to be near-universally feared and hated by other wolves in order to make his job as his father's hatchet man easier.

!Anna Latham Cornick
Omega wolf who was set up to be turned by the local pack leader after his mate went AxCrazy and killed all his group's female werewolves, needed someone to calm them down. She was abused for three years in the pack and was told very little, until Charles stepped in. Their inner wolves hit it off and they mated, and Anna moved to Montana.
* ApologisesALot: At first, due to her RapeAsDrama backstory and Omega nature. Slowly gets better over the course of the books.
* BewareTheNiceOnes: Let's put it this way—just because she's a genuinely good person and an Omega to boot, doesn't mean that she's not dangerous. [[spoiler: Ask Nimue. Oh, wait, you can't. Anna killed her.]]
* CompellingVoice: Borrowed from Charles.
* HeartIsAnAwesomePower: Omegas are peacemakers, which sounds ridiculous in a werewolf…until you realize that she increases life expectancies just by being around, can calm full-on berserker rages, and ''doesn't have to obey orders.''
* HappilyMarried: To Charles. They are often physically affectionate.
* TheHeart: This is her job as Omega; keep everyone calm so they don't kill each other.
* KillerRabbit: Oh yes. Cute, gentle Anna…who is still very much a werewolf.
* MoralityChain: Comes with being an Omega to a degree, but she definitely is one for Charles, Bran, and Asil.
* SilkHidingSteel: On the surface, she's a slightly-underfed, sweet-natured girl completely overshadowed by her extremely intimidating husband. Dig a little deeper, and you find someone who [[spoiler: put a knife between the ribs of the Lady of the Lake]] and regularly stands up to the Marrok at his angriest.

!Asil, A.K.A "The Moor"
An extremely old and dominant wolf living in Bran's pack. Originally wanted there because he wanted Bran to kill him for being old and crazy, and stayed around after the events of ''Cry Wolf'' because he likes yanking Charles' chain. Sometimes serves as a mentor to Charles, as his (deceased) mate was also an Omega.
* TheAtoner: Feels a great deal of guilt for having been traveling when his mate was killed.
* CynicalMentor: To Charles and Anna, sometimes, combined with TricksterMentor.
* DeathSeeker: Originally. Anna helps him get better, by [[spoiler: killing the witch who killed and enslaved his mate.]]
* TheDreaded: Bran and Charles are the only two werewolves whose names inspire more fear than his.
* HeroOfAnotherStory: More like sidekick of another story. When we see him from Anna's perspective, he's something of a mentor, and one of her few guides to being Omega. When we see him from Mercy's perspective in Frost Burned, he's a nearly-crazy, ancient, legendary werewolf who creeps her out more than a bit.
* IKissYourHand: Does it to Anna, to yank Charles' chain. Gets much, much more than he bargained for.
* ImmortalImmaturity: Subverted. He acts like a crazy brat at first, but it's just a ploy to get Bran to kill him.
* LivingLegend: Let's put it this way: When Anna tells other werewolves that she knows Asil, the typical reaction is something along the lines of "The Moor? ''That'' Moor?"
* NamesToRunAwayFromReallyFast: The way everyone who isn't Anna, Charles, or Bran views him.
* OlderThanTheyLook: Like most very old werewolves. He's not ''quite'' as old as Bran, though.
* ReligiousBruiser: He's a practicing Muslim, though by his own admission he's not been particularly good at following all of the Prophet's commands for some time. In particular, he enjoys a good glass of wine now and then.
* ShroudedInMyth: Before coming to the Marrok's pack, he was the dominate werewolf of the Iberian Peninsula. Neither Mercy nor Anna know how much of what is said about him is actually true (though they both suspect that most of it is).