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"None of us know for sure what's out there. That's why we keep looking. Keep your faith. Travel hopefully. The universe will surprise you. Constantly."

First appearance: "Twice Upon a Time" (2017)

Played by: Jodie Whittaker (2017-present)

"I know there aren't many certainties in any of our lives, but Umbreen, Prem, what I see you in you is the certainty you have in each other. Something I believe in my faith. Love, in all its forms, is the most powerful weapon we have, because love is a form of hope and, like hope, love abides in the face of everything. You both found love with each other. You believed in it, you fought for it, and you waited for it. And now, you're committing to it. Which makes you, right now, the two strongest people on this planet. Maybe in this universe."

The first female incarnation in the TV series, she debuted at the end of "Twice Upon a Time".

All-loving, all-fun, and incredibly easy with a big smile, this Doctor is a born adventurer with a slight air of Blithe Spirit who is very much eager to meet new friends. More so than past incarnations, she is a first-rate Gadgeteer Genius, crafting a whopping four improvised inventions in her proper debut episode alone, three of them in a single night. Her loveable lack of fashion sense harkens back to the colourful and loud ensembles sported by Doctors of the classic era.

Not to Be Confused with another famous female Doctor Thirteen.


Tropes associated with the television series:

  • 13 Is Unlucky: This Doctor has a problem with this.
    • The very first thing that happens to her is her TARDIS suffering multiple operations failures (which can be chalked up to her regeneration being held back... again), culminating in her being shaken out of the open door just before the time rotor itself explodes, filling the TARDIS with flame. Then, at the end of her first episode, she gets flung into a second intense cliffhanger: accidentally teleporting herself and her new companions into deep space, without spacesuits.
    • It continues in "The Tsuranga Conundrum": A sonic mine knocks out her and her companions for four days when they all wake up on a hospital ship far away from her TARDIS (again), with her having apparently taken the brunt of the damage.
    • In "The Witchfinders", she finds herself first not taken seriously because of her gender and then accused of witchcraft and dunked into a river. She bitterly notes that this wouldn't have happened in her previous incarnations when she was a man.
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    • In "The Battle of Ranskoor Av Kolos", she discovers to her horror that her attempts at dealing with Tzim-Sha via Cruel Mercy resulted in a Pacifism Backfire instead.
  • Adorkable: As with most Doctors. Her very first scene has her breaking into a huge smile upon seeing her new face and going "Oh, brilliant!" She's upbeat, highly energetic, and talks a mile a minute. She's also exceedingly friendly; for instance, she declares that Yaz is her friend about two minutes after meeting her, and in "The Ghost Monument", she introduces Yaz, Graham, and Ryan as her "new best friends" despite having only met them a few days ago. She's also not very good at small talk due to her tendency to go off on tangents.
    The Doctor: Never had a flat. I should get one! I'd be good in a flat. I could get a sofa! Imagine me with a sofa! Like, my own sofa. I could get a purple one and sit on it! [beat] Am I being weird?
    Ryan: Little bit, yeah.
    The Doctor: I'm trying to do small talk. I thought I was doing quite well.
    Yaz: Well... needs work.
    The Doctor: Maybe I'm nervous... or just socially awkward.
  • Adult Fear: She is horrified by the racist attitudes the group encounters in "Rosa", and is constantly fearing for Yaz and Ryan's safety throughout the episode.
  • All-Loving Hero: Twelve asked his next incarnation to always remember to be kind in his final moments, and Thirteen is indeed far more personable and invested in her companions' welfare right off the bat, even getting all their names down right away.
  • Ambiguously Gay: Yaz's mother assumes that she and Yaz are dating. For bonus points, the Doctor herself isn't sure.
  • Apologizes a Lot: This Doctor seems to find herself apologising in every episode of her debut series.
    • From her first episode:
      The Doctor: I'm sorry you all had to see this. [...] I'm sorry any of this is happening, I'm sorry that thing on the train planted these bombs inside you, and I'm sorry I haven't figured out what's going on yet.
    • In "Demons of the Punjab", there's mention of a Noodle Incident involving a "Death Eye Turtle Army", for which the Doctor says she has already apologized profusely.
  • Attention Deficit... Ooh, Shiny!: She is rather scatterbrained, easily distracted, and tends to go off on long, rambling tangents.
  • Badass Longcoat: Achieved with a long light-lilac coat with dark lining. (Lilac was chosen in honour of the women's suffrage movement, according to the costume designer in extra material shown in theatres after the episode.)
  • Being Good Sucks: As part of being extremely unlucky, Thirteen often finds herself in crucial moments of history she simply can't interfere with — even though there's great suffering around her, history demands that things like the segregation of the Deep South and the bloody massacres that came with the Partition of India must happen.
  • Berserk Button:
    • Reminding her of being an outcast:
      Remnant: We see what's hidden even from yourself, the outcast, abandoned and unknown.
      The Doctor: [snarling] Get out of my head.
    • Don't accuse her of hiding behind her title; King James I does it and gets a very icy Death Glare in return.
  • Beware the Silly Ones: This Doctor is quite the cheerful goofball, but she is certainly not someone to be trifled with. She can switch from silly to cold rage on a dime. One instance of this is in "Rosa", where she mainly acts like a goofy annoyance when confronting Krasko initially, but the instant he says that he'll kill her and her friends if he sees them again, she immediately drops her smile, glares, and says in a low, icy tone, "Don't threaten me."
  • Catchphrase:
    • Judging by the early episodes, hers will be "It'll be fine." And will primarily be used when all evidence suggests otherwise.
    • Early episodes also seem to have Thirteen saying "Let's get a shift on!" when she means press on.
    • Like Ten, she uses "Brilliant!" frequently.
  • Character Tics: The open-mouthed nose scrunch she does while looking intently at something.
  • Cheshire Cat Grin: Being a fairly cheerful incarnation of the Doctor, Thirteen is fond of giving all kinds of smiles, but this includes the sorts of smiles that are purely baring her teeth. She displays these kinds of wide, mischievous smiles whenever confronting and taunting her enemies, especially when she's alone with them. Her grin borders on Slasher Smile when facing the Thijarians and the recon Dalek.
  • Chronic Hero Syndrome: In her debut episode, even though she has lost her TARDIS and is going through the after-effects of her regeneration, causing her to barely remember her own name, she tries to help save her new human friends from a human-hunting alien.
    The Doctor: [talking about her post-regeneration-induced state of mind] I'll be fine. In the end. Hopefully. Well, I'll have to be because you guys need help. And if there's one thing I'm certain of, when people need help, I never refuse.
  • Cloudcuckoolander: The Doctor's sanity has always been up for debate, but even by Doctor standards she's noticeably loopy, which is plain to see in her debut episode:
    • She's able to use her sense of smell to calculate the exact timenote  she's about to faint. That, or she was using her nose to induce fainting and was expecting it to take longer.
      The Doctor: Oh, this new nose is so unreliable. [collapses]
    • She compliments Grace on the comfiness of her couch after recovering from a jolt that threw her into a wall.
    • She stares in delight at a spoon, before melting down handfuls of them to forge her new sonic screwdriver casing on Earth.
    • She casually mentions her craving of a fried-egg sandwich while trying to save Karl from Tzim-Sha.
    • She is positively giddy when she realizes her attempts to transport herself to her TARDIS instead sent herself and her companions (whom she didn't mean to take) to the barren vacuum of space instead; her companions are naturally terrified.
    • She has a strange relationship with logic in general, in one noticeable instance declaring that Jack Robertson can't be President if he's fired Yaz's mum.
    • In "It Takes You Away", she determines where the TARDIS has landed by chewing on the nearby soil.
  • Cuckoosnarker: She might be eccentric and a self-proclaimed "nutter" with a 3-second long attention span, but she's still prone to and capable of snarking at people who irritate her.
    Slade: How would you like a warning for insubordination?
    The Doctor: I'd love one! I could add it to my collection.
  • Dark Is Not Evil: In stark contrast to the general Lighter and Softer tone of her era, her TARDIS has very low lighting, like a mix of a crystal-filled cave and a Gothic cathedral.
  • Ditzy Genius: She's a brilliant Gadgeteer Genius who is fond of demonstrating her intelligence through teaching her companions fun scientific facts about things like spiders and anti-matter generators, and she has virtually zero social skills and a huge helping of Attention Deficit... Ooh, Shiny!.
  • Doesn't Like Guns: As with many of her previous incarnations, she seems to really loathe guns and is furious when Ryan tries to shoot a bunch of robot guards in "The Ghost Monument", making their situation much worse.
    The Doctor: Now do you see why I don't like guns?!
    Ryan: Don't go on about it.
    The Doctor: I will go on about it. A lot.
  • Establishing Character Moment:
    • Her first episode ends with her breaking into a humongous smile when she sees her new face, proclaiming "Oh, brilliant!" in response to it, and falling out of the TARDIS. The first trailer for her debut season features her brightly proclaiming "Right then, this is gonna be fun!" and asking her companions "Would you be my new best friends?" Capaldi's stern, prickly, and professional Doctor this is not.
    • Prior to this a moment that both establishes the 13th's character and shows how different she is from all her previous incarnations in the New Series has her throw Tzim-Sha the teleporter that will send him home after defeating him. Whereas the 9th, 10th, 11th and 12th would have watched him die, no second chances and all that, the 13th lets him go and then displays anger towards Karl for attempting to kill Tzim-Sha by kicking him off the crane.
  • Fashionable Asymmetry: She has an earring and an ear cuff on her left ear, connected by a chain.
  • Foreshadowing: The show had been building up to the Doctor becoming a woman for quite a while. One of Eleven's opening comments has him exclaim "I'm a girl", followed by a reference in "The Doctor's Wife" to a Time Lord switching genders, an option to choose his next incarnation's gender offered by the Sisterhood of Karn to the Eighth Doctor in the minisode "The Night of the Doctor", then "Dark Water" presents the Master's new regeneration as a woman, then "Hell Bent" includes a male Time Lord who regenerates into a woman, mentioning that her last incarnation was the only time she's been a man. Finally, in "The Doctor Falls", the Master wonders aloud if the future's going to be "all girl", to which the Twelfth Doctor replies "We can only hope." Steven Moffat himself claimed he inserted those inclusions to the lore to tease the audience of the possibility and to set the precedent in case it ever happened (which it did right when he left the show). Funnily enough, his very first Doctor Who writing credit was the Comic Relief special The Curse of Fatal Death, where a Ninth Doctor goes through four regenerations culminating in his thirteenth incarnation — a blonde woman!
  • Fingertip Drug Analysis: In "It Takes You Away", much like the Tenth Doctor, she skips the fingertips, though unlike him she doesn't lick the evidence but eats it.
  • Gadgeteer Genius: Demonstrated in her premiere episode when she makes a new sonic screwdriver in a very short time using remnants of an alien transit pod and components lying around a garage in Sheffield. Later, she uses the same components to make a mid-range teleporter.
    "I'm good at building things, probably."
  • Gender Bender: The Doctor's first female incarnation after thirteen male ones. She takes quite a while to get used to thinking of herself as a woman.
    The Doctor: [trying to get the TARDIS to materialise] Come to Daddy! [beat] I mean Mummy!
  • Genius Sweet Tooth: She seems to have a fondness for custard creams, and even has a custard cream dispenser in her TARDIS. She also mentions in "Demons of the Punjab" that she likes biscuits, so it doesn't seem to be limited to custard creams.
  • Good Is Not Soft: She's a lot nicer than her predecessor; she believes in Thou Shalt Not Kill, and she regularly offers Last-Second Chances. However, if a villain insists on being evil, she'll take care of business as effectively as any Doctor.
    • She is disgusted by the Stenza culture of tricking humans into letting them hunt on Earth, murdering people and taking their teeth as trophies, and capturing targets to be held in stasis forever, all as a rite of passage; and while offering Tzim-Sha the opportunity to leave peacefully if he chooses to change, has already tricked him into absorbing the five DNA bombs his data coil had planted in the witnesses on the train. When he chooses to "win" and activates the bombs, he seals his own fate.
    • She is completely unintimidated by Krasko, coldly telling him not to threaten her and deliberately goading him into attacking her just to activate his Restraining Bolt.
    • She activates thousands of bombs while a terrorist is standing in the middle of them. She does give him a chance to teleport away, waiting until Graham prompts her to activate the teleport without him.
    • She is furious at Becka Savage for being responsible for the murder of 36 women in order to cover up her own involvement with the problems and aliens plaguing Bilehurst Cragg, and she calls King James out for engaging in witch hunts to cover up his own darkness.
    • When the recon Dalek predictably rejects the Doctor's offer of mercy, she shows it as much softness as a Dalek ever shows anyone else, frying it in its shell with a microwave oven, and when that doesn't work, roasting it alive with a supernova.
  • Guile Hero: She has a penchant for tricking enemies into causing their own downfall.
    • She tricks Tzim-Sha into reabsorbing his own DNA bombs and then detonating them inside him.
    • She tricks Krasko into zapping all of his weaponry and tools, including the extra battery for his temporal displacement gun (and the gun itself only had enough energy left for one more zap), into the very distant future.
    • She fools the recon Dalek into believing she will take it to the Dalek fleet in exchange for it not hurting Ryan's dad, and then has it Thrown Out the Airlock into the core of a supernova.
  • Hair of Gold, Heart of Gold: The first blonde Doctor since the Fifth, and like him, this Doctor is one of the warmer, sweeter incarnations, almost always nice, and always kind. But, as with every Doctor, she's no one to be underestimated.
  • Hates Being Alone: A reoccurring trait across all Doctors, but especially notable in this incarnation as despite it she refuses to invite her new companions along, knowing that it hasn't ended well in the past. She's visibly upset when she tries to say goodbye to her new friends in "The Woman Who Fell to Earth", and when dropping them back home in "Arachnids in the UK" she looks like she's about to cry several times. She immediately takes up Yaz's offer of tea with her family as an excuse to spend more time with her new friends, and is visibly delighted when the new Team TARDIS convince her to let them stay.
  • History Repeats:
    • Like Ten, Thirteen is a new, young, bright-eyed Doctor portrayed by an unanticipated, fairly anonymous dark horse actor, and follows on from the tenure of a bitter, middle-aged cynic portrayed by a well-known screen veteran.
    • Like Two before her, Thirteen is the first regeneration of a cycle, opening up new directions for the series — Two introduced the idea that the Doctor could become someone else, Thirteen is the first female incarnation. (And rather fittingly, their predecessors meet for Twelve's final story.) Also like Two, her predecessor's ring doesn't fit anymore.
    • Like Two and Four, Thirteen is a flamboyant, hyperkinetic successor to a cold, dignified Doctor with white hair.
    • Like with Eleven, she was introduced during a major shakeup in the production team (including a new showrunner), though this era goes even farther by replacing the show's twelve-year-strong composer.
    • Like Five, she's played by a typically brown-haired actor who goes blonde for the role, and starts her tenure with three companions.
    • Her quite colourful costume, especially when compared to her immediate predecessor, invokes some of the Sixth Doctor's infamous "explosion in a rainbow factory" outfit, though her take on it is decisively more tasteful and subdued.
    • Like Seven, she is noted for her manipulative Hoist by His Own Petard tendencies, for example, blackmailing the antagonist in her first episode into leaving Earth by sabotaging his weaponry to blow him up (similar to Seven's actions in "Remembrance of the Daleks", though Seven follows through) if he does not leave. Time will tell, however, if she slides more into Seven's Chessmaster tendencies.
    • Like Eight, she is a lighter, softer and happier incarnation, following a darker and more pragmatic and serious incarnation (with a Scottish accent) who was often faced with having to do Dirty Business and Shoot the Dog. She also spends most of her first appearance struggling to even remember that she's the Doctor. Time will tell if the universe will conspire once more to Break the Cutie like poor Eight though.
    • Like Ten, Eleven, and Twelve, her predecessor regenerates inside the TARDIS, which immediately puts her in a dangerous situation when she's done. Like Eleven, the regeneration that created her (which was also staved off so their predecessor could tie up their last loose ends) appears to have caused considerable damage to the TARDIS interior and ironically wipes away the identity of the incarnation before her that resisted the change. She is left in the tattered clothes of her predecessor and gets flung outside of the TARDIS while miles up in the air with a huge drop waiting below. Only one big difference: Eleven manages to hang onto the TARDIS for dear life — Thirteen is shaken out, with the TARDIS disappearing soon after!
    • Like One, she starts out not actually looking for companions at all until a set is forced on her by circumstances beyond her control.
    • Like Three, she's initially stranded on Earth without a working TARDIS, and her attempt to jury-rig a viable means of transport does not go well.
    • Her first four episodes map quite well to Nine's: the newly regenerated Doctor appears in a contemporary setting and meets new companions, the companions' first trip is to a wildly alien setting, they go to the past and meet a famous historical figure, and finally the Doctor tries to drop her companions back home only to face another threat that ends up convincing them to stay with her.
  • Humble Hero: When Yaz asks if dangerous heroics are a normal thing for her, her reply is "I'm just a traveller" who tries to fix things. This is also reflected in how she shows her brilliance — while previous incarnations would often show off and brag about how clever they were, Thirteen prefers to just do and only brings up her intelligence more as a statement of fact than an attempt to impress.
  • Hypocrite: She's strongly against weapons, but explosions are okay. At least, they are as long as they're not used to kill someone. Err, well, someone that can't be rebuilt.
  • Iconic Item: The sonic screwdriver, which takes on a unique appearance in this incarnation because it was made from scratch and partly from Earth materials, notably Sheffield steel.
  • Improbable Hairstyle: She has blonde hair with dark roots right after regenerating. It's really obvious that Jodie Whittaker is Dyeing for Her Artinvoked.
  • In the Hood: Her first outfit includes a hooded overcoat.
  • Jerkass Ball: She grabs it in "The Battle of Ranskoor Av Kolos" in a rare departure from her usual empathy. Here a grieving Graham tells her he'll kill Tzim-Sha if he can; rather than try to console his grief she coldly tells him if he does so it'll mean immediate expulsion from the TARDIS; the fact that Tzim-Sha is still alive because of her Pacifism Backfire doesn't help her case.
  • Kubrick Stare: She displays one of these when confronting the baddies in "Demons of the Punjab".
  • Last-Second Chance: In several episodes she makes a point of offering these to the villains, even (or especially) when she knows they'll refuse, before finally laying the smackdown.
  • Lighter and Softer: The 13th's pleased first words and the colourful outfit juxtapose with the moodier 12th. Her early appearances in the Expanded Universe suggest a crafty, playful nature that is at odds with 12's more serious demeanour. The crew also made a conscious decision to move away from the intensive, emotionally brutal arcs favored by Moffat to a far more episodic structure.
  • Moral Myopia: As per usual of a Doctor; her Technical Pacifist ways of dealing with evil and Thou Shall Not Kill principle often conflict with each other to the point of hypocrisy — outright trying to kill Tzim-Sha is wrong, but inflicting him with his own DNA bombs is fine — and by her own admission her moral code is flexible. But nobody else around her — whether it be historic figures she meets or even her own companions — is allowed that same luxury.
  • Motor Mouth: She has a tendency to talk very quickly, especially when she's excited (which is often).
  • Nice Girl: As mentioned under All-Loving Hero, in her first episode alone she's immediately invested in the well-being of others around her, putting off her own problems (still in the midst of regenerating and having lost her TARDIS) for the sake of solving the potential alien threat. Also notably, after Tzim-Sha activates the DNA bombs, unaware that he was tricked into absorbing them earlier on, she still gives him his teleport recall to his home planet, showing more mercy than her previous post-Time War incarnations and giving him a second chance that they probably wouldn't have.
  • No Equal-Opportunity Time Travel: Has to deal with this firsthand when she lands in 17th-century England in "The Witchfinders", as due to being a woman in this regeneration, she's not taken seriously in that time period, and calling herself "Doctor" only arouses suspicion. She even bitterly notes that this wouldn't be a problem if she was male like her previous incarnations.
    The Doctor: [thoroughly fed up] Honestly, if I were still a bloke, I could get on with the job and not have to waste time defendin' myself!
  • No Social Skills: Though at least unlike Twelve, she's good-natured enough that it doesn't make her seem like a jerk.
  • Not So Above It All:
    • Despite her sweet personality she still has shades of the Doctor's usual character flaws, as shown in "The Tsuranga Conundrum": vanity, correcting someone who tells her that she takes up a chapter in a history book (after initially denying that it was her at all) that she takes up a whole volume, and selfishness, nearly hijacking a hospital ship full of sick patients to get back to her TARDIS until the ship's personnel points out her extreme selfishness in wanting to do so (though that can be ascribed more to her panic at losing the TARDIS again making her momentarily forget herself), ignoring the patients like she was ignoring her own pain at the time. She also still really hates not being in charge, and defaults to assuming that she knows what's best even if someone else is better equipped to be in charge of the situation at hand. Notably, these traits (particularly the selfishness) only come out when she's bleary with pain and in the midst of a freakout about losing her TARDIS, and disappear when she's called out on it and forces herself to refocus.
    • Just like her previous incarnations, she can become abrasively self-righteous to the point of glaring hypocrisy when it comes to her moral code of not killing and not using weapons. She scolds King James I for killing the Morax Queen, even though there was no other option for stopping her. She also reprimands Karl in "The Woman Who Fell to Earth" for pushing Tzim-Sha even though he was trying to kill him and the poor young man was scared out of his mind, yet she saw nothing wrong with inflicting him with his own DNA bombs. She also threatens to expel Graham from the TARDIS when he tells her he wants to kill Tzim-Sha as vengeance for him taking Grace; never mind her attempt of dealing with him non-lethally backfired speculatarly and made him even more dangerous than he previously was.
    • She scolds Ryan for using an alien gun against robot soldiers in "The Ghost Monument". Yet in "The Battle of Ranskoor Av Kolos", she tells him she has no problems using weapons against things that can be rebuilt. Ryan does call her out on this — which she justifies by saying she had to lay down some ground rules because he was new ... and to never mention that again because her rules change all the time.
  • O.O.C. Is Serious Business: In "Resolution", when she realises that the awakened creature is a Dalek, the normally upbeat and chatty Thirteenth Doctor shows how terrified she is by going silent, enough so that Yaz notices and is distinctly disquieted by the implications. Not long after, as she tells her companions about the Daleks, the Doctor's voice briefly drops into a bitter, almost hateful tone as she laments that no matter how many times they seem to be destroyed, the Doctor is never truly rid of the Daleks. This incarnation may not dwell on the horrors of the Time War as her predecessors did, but she still can't shake their lingering anger towards their oldest foe.
  • Oop North: Whittaker gets to use her thick Yorkshire accent, actually quite a rarity for her. But why not — lots of planets have a North. Combined with her Blithe Spirit personality, the accent only serves to make Thirteen come across all the bouncier and more hyperactive.
  • Pint-Sized Powerhouse: At 5'6", Whittaker ties with Sylvester McCoy as the shortest actor to play the role (she's actually a centimetre shorter, making her the shortest Doctor as of her casting). She laments her new short legs several times in her first episode (and given previous post-Time War incarnations were between 5'11½" and 6'1", it's not surprising she's having some trouble adjusting).
    The Doctor: [after barely making a jump between two cranes] These legs definitely used to be longer!
    • "The Ghost Monument" reveals she still knows and uses Three's Venusian Aikido, making her this trope in physical combat as well.
  • Pride: While it's less of a Fatal Flaw than it was with the Tenth Doctor (so far, at least), and Thirteen at least tries to be humble, she still shows a good deal of pride, always assuming that she knows what's best, disliking not being in charge, and permitting no one else the same moral flexibility that the Doctor herself is comfortable with.
  • Resurrection Sickness: She describes in brief what regeneration feels like: every cell in your body burning at once. No matter how often one does it, every time you think that this time you won't make it. Then at the very edge of death, you are born. Even after you come through the other side, there is a period of confusion between the old you and the new you while your body continues to fizzle and reformat and readjust. This caused her to have temporary retrograde amnesia. Humans have no idea how painful it is; no wonder Twelve didn't want to go through it again.
  • Rogues Gallery: Tzim-Sha of the Stenza, Sniperbots, Krasko, Jack Robertson, the Pting, Charlie Duffy, Morax, and the recon scout Dalek.
  • Rummage Sale Reject: In keeping with the Doctor's typical (lack of) fashion sense, Thirteen looks like she raided the wardrobe of a 1980s British kids' TV show — which, when given thought, is entirely appropriate. Plus, this is even further justified as she bought these clothes from a charity shop when Yaz pointed out that she needed to change and the Doctor observed that she herself had no money.
  • Running Gag: Not that she finds it funny, but she tends to be separated from the TARDIS a lot... usually because of an explosion.
  • Sad Clown: Thirteen is generally a cheerful, silly, and Adorkable sweetheart, but she still has the same grief and loneliness her previous incarnations have had, even if she might have learned how to cope with it a bit better. She takes letting down her companions very hard, as shown in "The Ghost Monument" when she is unable to find her TARDIS after having promised her friends that she'd be able to get them home. "Arachnids in the UK" shows that she feels desperately lonely, as she's on the verge of tears and only barely keeping up a cheerful tone and smile when she drops Yaz, Graham, and Ryan off at home (though she's barely able to look at them for most of the exchange), knowing that she's going to be alone with her TARDIS once more.
  • Sci-Fi Bob Haircut: Albeit without bangs, and a little longer than is usual for the trope, but still short and suited for a woman building things and sciencing solutions.
  • Seen It All: The Doctor doesn't blink an eye at Yoss' pregnancy in "The Tsuranga Conundrum" — it's not the first time she's encountered a pregnant man, and it probably won't be the last time.
  • Silly Rabbit, Cynicism Is for Losers!: She refuses to listen to anyone with a cynical attitude.
  • Socially Awkward Hero: She is friendly and gregarious but is very awkward and has no filter whatsoever. When meeting the family of one of her companions, she finds that she is not good at small talk since she ends up going off on tangents, which makes her come across as weird.
    Thirteen: Maybe I'm nervous... or just socially awkward.
  • Stepford Smiler: While she's notably less guarded with her emotions than many of her predecessors, that doesn't mean she isn't hiding some things. She acts cheerful and peppy on the surface, but, in "The Ghost Monument", for instance, the cloth weapons on Desolation pick up on the fear within her more than anyone else, not just fears from the many lives she's lived but fear of her "own newness". Additionally, later on in that episode, when the TARDIS isn't where she was told it was going to be, her positive attitude up until that point just disappears. She's clearly crushed that her beloved ship and oldest friend isn't there and believes she's broken her promise to her new friends to get them home safe and alive, almost in tears when the TARDIS finally does arrive.
  • Techno Wizard: She reconfigures Ryan's phone into a tracking device in less than five seconds without a sonic screwdriver.
  • Thou Shalt Not Kill: Seems to have made it her code and is really trying to stick to it and be more merciful than her previous post-Time War incarnations this time around:
    • In "The Woman Who Fell to Earth", while she does trick Tzim-Sha into absorbing his own DNA bombs and detonating them inside himself, the result isn't as quick as she'd claimed it would be when talking about them to her new friends and she tosses him his teleport and tells him to go home soon afterwards. She also calls out Karl for trying to kill Tzim-Sha by pushing him off the crane, telling him he had no right to do that.
    • In "Kerblam!", she begs Charlie to reconsider his plan before it goes too far and gives him until the last possible second to take the opportunity before she has to teleport away and leave him to his fate, only activating the teleport on Graham's prompting. She's visibly upset afterwards.
    • She makes a notable exception to this in "Resolution", but seeing as how the opponent was a Dalek, it's understandable, and the Doctor actually checks with her current companions to ensure that she gave her foe a sufficient opportunity to surrender before trying to kill it.
  • Took a Level in Kindness: Thirteen is unambiguously a flouncy goofball from the start, but also unambiguously sweet and compassionate in contrast to her predecessor's quiet, oftentimes hard outward demeanour. She's also this to the post-Time War Doctors in general, being far more merciful in her first outing in letting Tzim-Sha teleport back home instead of just letting him die as they would have done. This isn't Ten's "No second chances" Doctor at all.
  • Trademark Favorite Food: Custard creams, like her actress.
  • Tranquil Fury: Like her many regenerations before, you do not want to piss this woman off. All it takes is steel in her voice and fire in her eyes to enlighten whoever crosses her as to just why the Doctor is known as "The Oncoming Storm".
  • Wedding Ring Removal: The first thing that happens to her after regenerating is Twelve's ring (worn by Capaldi to cover his wedding band) sliding off her finger, not unlike how the First Doctor's ring didn't fit the Second's finger.
  • Womanchild: She is hyperactive and scatterbrained, and has some very childish tendencies as well.
    • While in Yaz's police car in "The Woman Who Fell to Earth":
      The Doctor: Can we have the lights and siren on?
      Yaz: No!
      The Doctor: [pouts]
    • In "Kerblam!":
      • When the Kerblam! Man arrives, she yells out and jumps up and down like a kid, shouting "It's the Kerblam! Man!"
      • We see her smile melt when she's told she can't ride the conveyor belts at the Kerblam! warehouse, under threat of getting fired.
  • Wrench Wench: Arc-welds her own sonic screwdriver out of a bunch of old spoons and scrap electronics.

Tropes associated with the Doctor Who Expanded Universe:

I feel glorious, glorious, got a chance to start again.

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