As of the end of Season Three, major changes happen to the cast that affect the entire continuity of the show; spoilers will be unmarked. YOU HAVE BEEN WARNED. Beware: only developments of the newest season will be spoilered. (Right now, that's Season 6.)
Rafael McCall (portrayed by Matthew Del Negro)
Melissa's ex-husband and Scott's father, who walked out on them when Scott was very young. He's working as an FBI field agent.
- The Alcoholic: Apparently had a bad drinking problem while he was married to Melissa.
- The Atoner: Genuinely wants to make good on his former mistakes, and tries to be around for Scott and Melissa.
- Big Damn Heroes: Rescues Stiles from a serial killer about to shoot him at the last second.
- Disappeared Dad: Walked out on his wife and son when Scott was only a toddler. He returns in Season 3.
- Et Tu, Brute?: Harbors a grudge against Sheriff Stilinski, because he was the deputy answering Melissa's domestic disturbance call the night a drunken Rafael caused Scott's fall from the stairs.
- Great Detective: In Season 3B "Riddled" he manages to find the missing Stiles based on a voicemail the latter left to Scott.
- In-Series Nickname: His wife calls him "Rafe."
- Jerkass: Established in his first scene in Season 3 "Alpha Pact", where he runs into Stiles and implies that his father is absent from the crime scene because he has been drinking on the job.
- Jerk with a Heart of Gold: when he decides to help the Sheriff save his career, and admits to him that his impeachment was an Excuse Plot to stay in town because he wanted to make things up to Scott.
- Locked Out of the Loop: Invoked in Season 3; played with in Season 4, when he notices that his son and his friends are far too calm for the horrible things that keep happening to them, and mentions to Scott that he wants a talk upon returning from his trip to San Francisco.
- My Greatest Failure: Apparently the trigger for his leaving Melissa and Scott was a drunken argument with Melissa one night where he accidentally knocked Scott down a flight of stairs. He left in shame, without considering that Melissa and Scott might have preferred he tried to solve his problems while staying around for his son.
- "The Reason You Suck" Speech: He's handed more than enough by Melissa and Scott on his actions, including being an absentee parent, impeaching Stilinski, and not trying harder to make things up to his family.
- Weirdness Censor: He gets attacked by Oni twice and still seems to think there is a normal explanation to it all. He catches on eventually.
Claudia Stilinski (portrayed by Joey Honsa)
The Sheriff's wife and mother to Stiles. Claudia succumbed to an onset of dementia when Stiles was nine. Nonetheless, she remains a constant presence in their lives.
- Death by Origin Story: Neither Stiles nor his father would be the men they are if Claudia were still alive. Their relationship is notably affected by her demise, leading to both being very protective of the other, deeply afraid of experiencing another such devastating loss.
- Happily Married: The Sheriff's memories of her (from before her illness) certainly imply this.
- The Lost Lenore: The Sheriff still wears his wedding ring, and despite evident chemistry with Melissa, doesn't seem willing to move on from his wife's death to seek out new romance.
- He finally does take off his ring in Season 5 and actually goes on a date with Natalie Martin.
- Posthumous Character: Died while Stiles was just a child.
- Sanity Slippage: Over the course of her illness, she got more and more paranoid, to the point where she suspected Stiles of wanting to kill her, and attacked him.
Victoria Argent (portrayed by Eaddy Mays)
The matriarch of the Argent family, Chris' wife and Allison's mother. Despite her ice-cold demeanor and harsh personality, she loves her husband and daughter and feels very protective of Allison especially.
- Ax-Crazy: She can switch from coldly ordering executions of werewolves to offering someone cookies. She also decides to mutilate her own arm so to fish for information about Scott from his mother who's a nurse ... playing her injury off as an accident.
- Anti-Villain: Of Type I. She believes the hunters' cause is necessary to protect human norms to the point in the Season 2 episode "Shape-Shifted", to keep an eye on the werewolves of Beacon Hills she arranges to have Gerard pose as principal and she can take a job as a substitute teacher - by kidnapping the actual principal and torturing him to force him to resign!
- The Baroness: As the matriarch of the family, Victoria is their official leader and makes the final decisions.
- Disproportionate Retribution: She implies to Scott that she'll have him castrated (see Freudian Threat) if she finds out he and Allison are having sex. When she actually catches them kissing, she sets out to kill him.
- Driven to Suicide: After being Bitten by Derek, she impales herself with a knife right as she begins transforming into a wolf on a full moon.
- The Dragon: Even though she was the overall leader of the Argent hunters, she falls into this role to Gerard.
- Even Evil Has Loved Ones: She does love Chris, and is fiercely protective of Allison. All of her actions, as misguided as they are, can be seen as her attempts to keep Allison from harm.
- Evil Matriarch: Tries to murder Scott and make it look like an accident for having sex with her daughter.
- Freudian Threat: Asks Scott if he's sleeping with her daughter while sharping a fresh pencil to a stump.
- Fur and Loathing: Frequently seen in a fur coat when out in public. Given her family's proclivities, the symbolism is kind of creepy if you think about it for too long.
- Karmic Transformation: Gets Bitten by Derek in self-defense, and is in the process of turning into what she hates the most.
- Knight Templar/Knight Templar Parent: More so than Chris. When she learns Scott is still seeing Allison - and that they're sleeping with each other - she decides to murder Scott.
- Laser-Guided Karma: Right after she attempts (and fails) to kill Scott, she is bitten by Derek.
- Mama Bear: Have sex with her daughter? Hope you like a slow death by wolfsbane vapor.
- Power Hair: Victoria has hair shorn even shorter than Hilary Clinton's, very controlled (just like her).
- Principles Zealot: Actually commits suicide rather than become a werewolf, as this is what hunters are required to do.
- She Who Fights Monsters: She abducts and tortures the high school principal so he'll quit and Gerard can be installed in his place to keep surveillance on Beacon Hills' werewolf population.
- When she discovers Scott is still dating Allison, she decides to murder him very slowly via wolfsbane vapor.
- Silk Hiding Steel: Barely hiding, but she switches from offering cookies to ordering murders to complaining about academic standards dropping to torturing people on a dime.
- Would Hurt a Child: With her decision to murder a teenage boy, because he was a werewolf seeing her daughter.
Noshiko Yukimura (portrayed by Tamlyn Tomita, Arden Cho [in flashbacks])
Noshiko Yukimura is the mother of Kira and a centuries old kitsune of legend. Consumed by rage over the loss of her American boyfriend Rhys while detained at a Japanese internment camp during WWII, she channeled the powers of the Dark Kitsune, intending to use its powers to get vengeance. Instead, the dark spirit took over Rhys, giving rise to the Nogitsune.
Noshiko, along with her husband Ken, now serve to mentor Kira on how to hone her own Kitsune powers.
- Action Mom: She's seen her fair share of action, and doesn't hesitate to step right back into it when she feels the situation calls for it.
- Anti-Villain: During Season 3B, of Type III. Noshiko is adamant that the Nogitsune, her Arch-Enemy, be eliminated to prevent total chaos - even if that means killing its current host - Stiles!
- Badass Boast: See quote. And she lives up to it. A spear is thrown at her by a skin-walker - she slices it in half.
- Brought Down to Normal: After using up all her Tails during the events of season 3. When she reappears post Season-3, it's confirmed she's lost her healing abilities and strength.
- Brought Down to Badass: Despite losing her powers, she's still a capable swordswoman.
- Good Parents: She and Ken are this to Kira. The fact that Kira presently has the only set of parents who are aware of and active in the supernatural world takes this Up to Eleven.
- Happily Married: To Kira's father, Ken.
- Interspecies Romance: With Rhys, then with Ken, both humans.
- I Did What I Had to Do: In 1943, Noshiko was heavily shot during the massacre at Oak Creek, but barely alive. When the bodies were about to be disposed of by fire, she knew she was going to die, so to save herself was partially the reason she summoned the Nogitsune along with her Roaring Rampage of Revenge below.
- Happened to her again when she went up against the Nogitsune to stop his vengeance and chaos by killing the newly-reanimated corpse used as his host - her great love Rhys.
- Once again in the present day when the Nogitsune is released and her using her Tails to summon the Oni to slay the Nogitsune.
- Last of Her Kind: Mentioned to be the last surviving member of her family.
- Katanas Are Just Better: Used on while fighting the Nogitsune. It is unknown if her katana is magical or if she supplies its magic.
- Kitsune: Like her daughter, she is one.
- Mama Bear: When push comes to shove, Noshiko will fight tooth and blade to protect her daughter. Just see above quote.
- The Mentor: Noshiko teaches Kira what it means to be a Kitsune, showing her how to utilize her recently awoken powers. Also, during a Team Mom moment with Melissa in Season 4, when Melissa wonders if it's right to let their kids face all these dangers, she mildly observes that the only other way would be having them run for the rest of their lives.
- My God, What Have I Done?: Her realizing her great mistake in WWII in summoning the Nogitsune which resulted in chaos, destruction, and the deaths of her fellow inmates. All of her actions in Season 3B result from her wish to take responsibility, when the Dark Spirit rises again.
- Passing the Torch: Noshiko is a nigh-immortal, experienced Kitsune who wields a special katana. After sacrificing her tails to summon the Oni necessary to battling the Nogitsune, her powers are used up; she thus hands the sword to her daughter Kira, who has come into her powers just recently. Noshiko from then on serves as Kira's Trickster Mentor.
- Really 700 Years Old: Although Noshiko currently looks like a fairly normal, if very attractive 40+ mother, she's actually close to 900 years old. It comes with being a Fox spirit.
- Roaring Rampage of Revenge: Her initial plan back in World War II was to summon the Nogitsune and wreak havoc on those involved in Rhys's death. It...didn't quite go the way she planned.
- Silk Hiding Steel: Her present day confrontation with the Nogitsune shows that she has lost nothing of her edge.
- Sticky Fingers: Possibly a part of her trickster nature manifesting itself, while imprisoned at Oak Creek she frequently stole food and supplies for her fellow prisoners. She got away with it in part due to her boyfriend looking the other way.
- Team Mom: Alongside Melissa, but she serves this role in a different way; while Melissa represents the more involved aspect, being The Medic for the Pack, Noshiko plays the part of a wise mentor for Kira and occasionally the rest of the pack as well.
- Weapon of Choice: Her special katana which could neutralize the Nogitsune. It becomes a Wrecked Weapon after she defeats the Nogitsune the first time. Decades later, the main characters put it back together and she passes it to Kira.
- Noshiko's nine Kitsune Tails were represented as daggers called kaiken which served as her Power Source. She sacrificed eight of them to summon the Oni, powerful spirits meant to destroy the Nogitsune; the ninth was stolen by the Nogitsune and used to take over the Oni himself. The loss of her Tails lead to Noshiko being Brought Down to Normal and losing all her powers.
Ken Yukimura (portrayed by Tom T. Choi)
Kira's father and Beacon Hills High's replacement history teacher (after the Darach's murder of the previous one), as well as the school's driving instructor.
Fully aware of the supernatural world, that Noshiko is a Kitsune and their daughter has inherited her lineage, Ken does his best to support both of them in times of need.
- Adorkable: As embarrassing as his actions can be, they are endearing in a way as he is oblivious to the anguish he causes for his daughter (see above quote for details). It's clear this is where Kira gets her more goofy aspects from.
- Amazingly Embarrassing Parents: Seems to have no problem discussing his daughter's personal life in class...while she's sitting in one of the rows. Likewise, he loudly discusses her crush on Scott with her...in front of Scott.
- The Blacksmith: Word of God has said he's a weapons maker: he fashioned the piece of obsidian that Kira used to trigger her healing talent and became her first Tail into a shuriken. He also crafted Kira's new sword that can de disguised as a belt seen in Season Five.
- Good Parents: Ken clearly cares for and loves Kira, giving her advice and comfort as she comes to terms with her Kitsune nature. He goes as far as confessing to killing a chimera in self-defense, when it appears that Kira murdered her under the influence of her fox spirit.
- Happily Married: He clearly loves his wife and is very supportive of her.
- MayflyDecember Romance: With Noshiko, who's around nine hundred years old.Noshiko [on her age]: Actually, closer to nine hundred.
Kira [shocked]: Dad, how old are you?
- The Mentor: To Kira, sharing this role with Noshiko, to help their daughter understand and harness her Kitsune nature.
- Nerves of Steel: In Season 3 "The Fox and the Wolf", Ken keeps his cool rather well when being confronted by a 1000-year-old Dark spirit. Have to be if one were married to a 900-year-old Kitsune.
- Older Than They Look: Ken has jokingly remarked that some people say he looks to be in his mid-thirties.
- Reasonable Authority Figure: Ken is a teacher at the school who's aware of the supernatural goings on at the school and covers for his daughter and her friends now and then.
- Real Men Cook: Is the family's cook, something Noshiko is quite proud of. When Scott first visits their home he's treated to a sushi dinner.
- Snark-to-Snark Combat: Tends to get into it with his daughter over his daughter's social life.Ken: You said you wanted to be noticed.
Kira: I could set myself on fire and be noticed.
Ken: And then you'd be dead.
- Token Human: Ken is this to the Yukimura family.
Natalie Martin (portrayed by Susan Walters)
Lydia's wealthy and supportive, if slightly distant and shallow-minded, mother, who has custody of her after the divorce.
- All Therapists Are Muggles: She's the new Guidance Counselor at Beacon Hills Highschool in Season 5, and resolutely overlooks all bizarre incidences thanks to her Weirdness Censor.
- Good Parents: She genuinely wants the best for Lydia, urging her to see the school counsellor when she suffers from nightmares in Season 2, and supporting her when she decides not to hide the bruises she got from the Darach trying to strangle her in Season 3.
- Mama Bear: When she downs Tracy with a shock baton when the latter threatens Lydia during the escape from Eichen House.
- Obfuscating Stupidity: She makes a point to appear like a shallow, flirtatious socialite, but proves to be genuinely intelligent and competent in a crisis, showing Nerves of Steel when a dangerous virus breaks out in school. Her care for Lydia, and most surprisingly, Coach Finstock, further hint that her superficial exterior is largely a facade.
- Psychologist Teacher: Starting in Season Five where she helps the senior Tracy with her night terrors.
- Snark-to-Snark Combat: Trading sarcastic remarks seems part of her Mother-Daughter-Bond with Lydia.
- Weirdness Censor: When Tracy tells her that she suspects her nightmares of strange masked men lurking outside her window aren't just nightmares, and then vomits black blood and feathers onto her desk, Natalie insists she's probably just suffering from anxiety typically for a Highschool Senior.
- And when Lydia implores her not to tell anyone about the strange things she saw during Tracy's attack, she irritably replies that all she saw was "a lunatic girl trying to kill everyone" - leaving out that the girl in question had a reptilian tail, claws, and golden eyes.
- It grows into a more unusual variety when it becomes clear that Natalie actually knows about the supernatural, but still refuses to admit this, preferring rational explanations for everything. She implies it's helping her survive in Beacon Hills.
- By season 6, she is no longer in denial.
- What the Hell, Hero?: Gets a small one of these from Malia, when she tries to keep her from running after distressed chimera Beth. Later on, the Sheriff also berates her for not even considering that Lydia could be in danger at Eichen House due to her supernatural nature.
Lydia's father, who forced her to choose which parent she wanted to live with after their divorce. Apparently, he had a strained relationship with his mother, Lorraine, due to her "erratic behaviour."
Lydia's paternal grandmother, who was a patient at Eichen House, as well as a banshee like her.
- Doting Grandparent: Lorraine would read The Little Mermaid to a young Lydia. Lydia would grow to become obsessed with the story and wanted to be called 'Ariel'. Lorraine conceded and thought it was adorable.
- Foreseeing My Death: She predicted her own demise, together with that of many other supernatural beings. Most of the others are saved. She's not.
- Lobotomy: Tried to perform one on herself with a drill when she first came to Eichen House.
- Posthumous Character: Died before the start of the series, but proves of great importance to both her granddaughter and the supernatural community of Beacon Hills during Season 4.
- Psychic Powers: It's unknown how, but she seems to have predicted the events of season 4 and coded a list of people the Benefactor would target.
- Self-Fulfilling Prophecy: The aforementioned list then fell into the Benefactor's hands, which made it far easier for them to place a bounty on the heads of Beacon Hills's supernaturals.
Desert Wolf/Corinne (portrayed by Marisol Nichols)
Known to most people only by her codename, the Desert Wolf is a contract killer and Malia's biological mother whom seemingly left her at the hospital after giving birth. In Season 5, Malia recovers her memory of the Desert Wolf causing the car crash that killed Malia's adoptive mother and sister. Later, it is revealed that her first name is Corinne, and that part of her werecoyote power was transferred to Malia when she was giving birth to her. She now aims plans to kill Malia, to restore her full powers to her.
- Action Mom: She's Malia's mother, and is a contract killer and a werecoyote.
- The Dreaded: The Desert Wolf is a well-known and highly competent assassin, who seems to do her reputation justice.
- Evil Gloating: When she sadistically taunts Malia whilst stalking her in the McCall house, that she always intended to kill her off even when she was pregnant with her, never heeding Talia Hale's insistence that childbirth was a gift as well as a werecoyote transferring part of their power to their child.
- Evil Matriarch: Is this to Malia.
- The Ghost: She's mentioned quite a bit in Season 4, but doesn't appear until Season 5, episode 8, "Ouroboros".
- Impaled with Extreme Prejudice: In the Season 5B finale courtesy of Malia who stabs her with the garuda talons to drain Corrine of her remaining power, defeating her.
- Jerk With A Heart Of Jerk:Malia: "I killed them because of you! I killed my own family!"Corrine: "Your adopted family. I'm your family, sweetheart. (...) But if it makes you feel any better, I didn't care about them. I was just trying to kill you."
- Missing Mom: She disappeared after Malia's birth. Turns out Talia Hale had snatched Malia from Corrine to protect her from the assassin.
- No Name Given: She's generally known only by her code name: the Desert Wolf, Deaton gives her name away as Corrine.
- Offing the Offspring: She was gunning for Malia when she was a nine-year-old girl, but in the end failed, instead causing Malia's Traumatic Superpower Awakening. In the present, having found out Malia is still alive, she now intends to return to Beacon Hills and finish Malia off.
- Only Known by Their Nickname: Even Peter Hale only knows her as the Desert Wolf, and he's the father of her child. Her first name is revealed to be "Corinne".
- The Sociopath: So far, all she appears to be is a totally unrepentant killer, remorseless over her actions. She caused Malia to lose control and kill her adoptive mother Evelyn and younger sister, though it wasn't her intention. She has even the nerve to tell Malia that she's her family.
- Even when she was pregnant with Malia, she was intending to kill her once she'd give birth, to restore her power.
- Terms of Endangerment: Even while plotting to kill Malia she calls her 'sweetheart'. Malia is angered at this.
- The Only One Allowed to Defeat You: She lost part of her powers to Malia when giving birth, and now aims to kill Malia so to take them back.
- Would Hurt a Child: She attempted to have Malia killed when she was nine. Though she failed, her actions resulted in Malia's younger adoptive sister being killed.
Henry Tate (portrayed by Todd Stashwick)
Henry Tate is Malia's adoptive father. Ever since his wife Evelyn and two daughters died in a car accident several years ago, he's been devastated with grief, and lived a lonely life on his farm. When Malia is miraculously returned to him after 8 years, he's beyond happy. Her various secrets seem to keep their relationship strained at first, but by Season 5, they are shown as happily settled in their father-daughter dynamic.
- Good Parents: When Malia nervously awaits test results that will determine whether she joins the others in Senior year, he kindly tells her she'll get them in time.
- Jumping Off the Slippery Slope: When it's believed a coyote mauled his family, he develops an irrational hatred against the animal in question. He brings a gun into the school after hearing the coyote was seen there, he sets up multiple steel jawed traps throughout the woods to trap it potentially endangering hikers, joggers. He also goes into the woods guns blazing - literally - trying to shoot the animal dead. He's unaware the coyote is his daughter Malia fully transformed which almost leads to him Offing the Offspring.
- Locked Out of the Loop: He's completely unaware that Malia is a werecoyote, and that she presumably killed his wife and younger daughter during her first surprising transformation at age 9. Malia suffers greatly from this.
- Muggle Foster Parents: He's a normal human man, who unknowingly raises a werecoyote.
- Outliving One's Offspring: Initially with both Malia and his younger daughter. Averted with Malia when she's returned to him.
- Papa Wolf: He definitely is after seeing the attention Malia's getting.Stiles: Sorry we're late! (Malia runs up to him, smiling.) Hey. (They kiss for several seconds.)Liam: (hopeful) I'm sorry too.
Henry: You boys do remember I own a gun, right?
Henry: (Walks away with a lopsided smirk.)
- Weirdness Censor: He is somewhat stumped when his teenage daughter moves an enormous fallen tree with a single hand, but doesn't inquire further when she assures him she just followed his advice and lifted 'using her legs.'
Malia's adoptive mother and Henry's late wife. Evelyn was killed in the family's car accident along with her younger biological daughter caused by Malia's unintentional werecoyote transformation.
- Death by Origin Story: Malia accidentally killed her during her Involuntary Transformation following a car accident, which led to the girl fleeing into the wilderness and staying a coyote for almost a decade. It later turns out the car was forced off the road by the Desert Wolf, who shot at Evelyn and the girls, aiming to kill Malia.
- The Lost Lenore: To her husband Henry.
- Posthumous Character: Evelyn died eight years approx prior to the series timeline.
Dr. Geyer (portrayed by Todd Williams)
Dr. Geyer is Liam's stepfather and a surgeon at Beacon Hills Memorial hospital.
- Academic Athlete: When he was in high school, he was the captain of his lacrosse team, and he studied medicine at Harvard. When Liam was younger, he played lacrosse with him.
- Good Parents: He appears close to and supportive of his stepson, and seems dedicated to help him overcome his rage problems.
- Locked Out of the Loop: Liam insists that his parents can't know about him being a werewolf; because of his anger management issues, he's afraid they'll see him as a monster. Geyer begins to get suspicious in Season 5, demanding answers from Melissa, who basically tells him it's not a good time (they are trying to save the life of the sheriff).
- Remember the New Guy?: He and Melissa know each other well, and seem to have been colleagues for a while.
Liam's mother, who is mentioned but never appears.