Esmerelda "Esme" Weatherwax (usually called Granny Weatherwax or Mistress Weatherwax on formal occasions, such as when being addressed by not-yet witches (Tiffany Aching being the case in point) or Mrs. Earwig or Verence, King of Lancre (when he's being really 'King-y')) is a fictional character from Terry Pratchett's Discworld series. She is a witch and member of the Lancre coven. Granny Weatherwax, if she can help it, wears a plain black dress, a somewhat battered black cloak and a tall, pointed witch's hat, skewered to her 'iron-hard gray bun' hairstyle with multiple hatpins. She is thin, and, while not really that tall, has such a commanding presence that she seems tall. She gives her weight as "9 stone" in Lords and Ladies (exactly 126 pounds or approximately 57.27 kilograms). Many references are given to her blue eyes and penetrating gaze.
From the triple nature of a coven (maiden, mother, and crone), Granny Weatherwax is officially the crone. In fact, it has been suggested that she embodies all three, but the Crone is the most obvious (she has difficulty matching the classic appearance; despite her best efforts, she still has perfect skin, not a single wart and all her teeth, although she has picked up a penetrating stare and plenty of worry lines). In the books, the triple nature of the coven is always referred to as "the maiden, the mother and... the other one" in her presence. She probably has not known physical love as demonstrated by her ability to capture unicorns, traditionally only possible to virgins. There have however been romances in her life.
She is a very powerful witch, and is reckoned to be more powerful than the most well-known witch on the Discworld, Black Aliss (real name: Aliss Demurrage) who is responsible for any number of witcheries in fairy tales, such as putting a castle to sleep and getting pushed into her own oven by naughty kids. It does seem that her teacher's teacher's teacher's teacher was Black Aliss. ("I learned my craft from Nanny Gripes, who learned it from Goody Heggety, who got it from Nanna Plumb, who was taught it by Black Aliss..." – Granny, in Lords and Ladies).
Granny Weatherwax's reputation even extends beyond species barriers – the trolls of the Ramtops call her Aaoograha hoa ("She Who Must Be Avoided") and the dwarf name for her, K'ez'rek d'b'duz, translates to "Go Around the Other Side of the Mountain" (Maskerade).
Granny Weatherwax nursed her mother until the time of her death, and is a distant cousin to Galder Weatherwax, a former Archchancellor of the Unseen University. As a young woman, she was briefly romantically involved with Mustrum Ridcully. It has been hinted that she married him in an alternative reality and had several children. As a youth, she briefly called herself "Endemonidia" but only for a few hours.
She has recruited at least one apprentice in her time, Eskarina Smith, who became the Discworld's first female wizard (Equal Rites) and was subsequently never mentioned in canon again. Magrat Garlick, Agnes Nitt and Tiffany Aching were officially taught by other Witches, but also learned from Granny Weatherwax from time to time.
Granny's broom is famous for being old and temperamental. It's a hand-me-down "borrowed" from her colleague Hilta (Equal Rites). It has been repaired so often that little of the original broom remains, and it often requires the user to pick up speed by running along the ground, making it the only broom on the Disc that requires bump starting. It is, however, considerably faster than most brooms once it gets going.
According to to The Pratchett Portfolio her typical saying is: 'I can't be having with that kind of thing'. Unlike most 'typical sayings' in the 'Folio, it is actually recorded that Granny says this, or at least Nanny Ogg says something very similar when she pretends to be Granny while briefly taking over the role of...the other one, due to Granny's temporary retirement in Carpe Jugulum.
Granny Weatherwax feels little need for personal possessions and keeps most of them in a single wooden box. This box is known to contain a few keepsakes, including a bundle of letters (some, or all, of which are believed to be from a young Mustrum Ridcully) and a phoenix feather in a glass bottle. Aside from these, her only other notable possessions are a clock that she inherited from her mother and a silver tea service (later melted down to make horseshoes for a Unicorn during the events of Lords and Ladies). However, the citizens of Lancre also believe it contains the secrets of the universe, a neverending fortune in gold or a small universe. Granny has done little to discourage these rumours.
In an apparent test to unearth her softer side, Tiffany Aching recently made her the reluctant custodian of a small white kitten, for which Granny has so far managed to show affection in a completely unaffectionate manner. In keeping with her personality, she christened it "You", as in "Hey You, get off the shelves!" or "Come inside, You!" You was recently discovered sleeping on Granny's head, underneath her hat. She claims it keeps her head warm. You is the only known cat on the Discworld to have intimidated Nanny Ogg's battle-scarred, possibly demonic tom Greebo, who hides in fear whenever You is in the same room; this suggests she may be compatible with Granny Weatherwax in temperament after all.
It has been said that Granny Weatherwax bears some similarity to Sam Vimes. Both are effectively 'good' characters who exert a rigid control over the darkness inside themselves, which they secretly fear.
(The name and personality of Granny Weatherwax are possibly a reference to "The Jilting of Granny Weatherall" by Katherine Anne Porter, although the name Weatherwax itself is not unique to Discworld).
Headology bears some similarities to psychology in that it requires the user to hold a deep seated understanding of the workings of the human mind in order to be used successfully. However, headology tends to differ from psychology in that it usually involves approaching a problem from an entirely different angle.
It has been said that the difference between headology and psychiatry is that, were you to approach either with a belief that you were being chased by a monster, a psychiatrist will convince you that there are no monsters coming after you, whereas a headologist will hand you a bat and a chair to stand on.
She is also highly adept at 'Borrowing' – the art of overlaying her mind on the mind of another creature so that she can see through its eyes and steer its actions without it being aware of her presence — and can tune her mind to the point that she can sense the underlying mood of her surroundings (including the mood of plants, animals and the earth) and the presence of 'stories' that are trying to play themselves out. She has even borrowed a beehive, considered one of the most difficult minds to borrow due to it being spread over many bodies, and even borrows the mind of the Unseen University itself (in Lords And Ladies and Equal Rites, respectively). In Wyrd Sisters, her second appearance, she makes contact with the very mind of Lancre itself. However, while her mind is out Borrowing, her body falls into a catatonic, almost death-like trance; it is revealed in Lords And Ladies that in order to prevent embarrassing accidents, she has taken to wearing a placard reading "I Aten't Dead" when she does so.
She has even been known to be able to detect the memories of Granny Weatherwaxes living in alternative realities, but only at points in time when the walls between her world and other worlds are particularly thin.
In addition to her moral limitations, it has been previously stated that there are some forms of magic that Granny Weatherwax cannot do, either through inability or aversion. These forms include some of those most commonly associated with Wizardry, including pyrokinesis (Equal Rites). She has, however, ignited a log by glaring at it until it combusted out of pure embarrassment. She also claimed it was impossible to catch a sword in your hand without being hurt but did just that shortly afterward (although there was an element of trickery involved; she moved the wound through time). It has been stated that when Granny says a task is impossible, she means it is impossible for anyone but herself.
The only thing which repeatedly defeats Granny is her flying broomstick. It refuses to start smoothly, despite dwarfs replacing both handle and sticks. She maintains, however, that it "will be Right as Rain with a bit of work" [sic].
Granny's relationship with the written word is strained, bordering on combative. This is not an unusual situation on the Discworld, where spelling and punctuation are variously regarded as optional extras or creative arts.
In the Wyrd Sisters animated adaptation, Granny Weatherwax was voiced by Annette Crosbie.