Mirri Maz Duur

Mirri Maz Duur was a character in Game of Thrones. She appears in the first season and was played by Mia Soteriou.

Mirri Maz Duur was a healer and wise woman living amongst the Lhazar, worshippers of the Great Shepherd.

The Pointy End
Daenerys Targaryen orders that the Lhazareen women enslaved in a raid by Khal Drogo's khalasar - including Mirri Maz Duur - be handed over to her custody, rather than being raped as prizes of war. One of Drogo's warriors, Mago, objects. When Drogo agrees to Daenerys' request, Mago challenges Drogo to single combat. Drogo kills Mago, but takes an arakh wound to his chest. Mirri Maz Duur volunteers to heal the wound, saying that she is a goodwife or priestess of the Lhazareen god, the Great Shepherd. Drogo's bloodrider Qotho objects, calling Duur a maegi or witch, but Drogo accepts her ministrations.

Baelor
Despite Mirri Maz Duur's best efforts, Drogo's wound festers and he becomes seriously ill, falling from his horse. Duur claims that she can save him, but must sacrifice a life, that of Drogo's horse, in the process. Qotho becomes enraged at her use of magic to save Drogo and tries to stop the ceremony, but is killed by Ser Jorah Mormont. Daenerys is thrown to the ground and goes into labor, so Mormont takes her into the tent where Duur is carrying out the ceremony to ask for her aid.

Fire and Blood
When Daenerys finds out that her son was stillborn and badly malformed, and Drogo is alive but in a vegetative state, she calls Mirri to task. Mirri explains that Daenerys got what she traded for, and that before she was "saved" by Dany, she had already been raped several times and her temple had been burned. Now thanks to her spell, Drogo and his son can cause no more suffering. Later, when Daenerys creates a funeral pyre for Drogo, she orders Ser Jorah Mormont to bind Mirri to the pyre. The witch claims she won't scream. She begins chanting as the flames slowly engulf her, though her singing quickly changes to shrieks of pain as she is burnt alive. True to Daenerys' word, Mirri dies screaming.

In the books
In the Song of Ice and Fire novels, Mirri Maz Duur is a wise woman amongst the people of Lhazar, a country southeast of the Dothraki sea on the continent of Essos, and has learned healing arts from around the world, including Westeros. She acts as a midwife and herbswoman, and is reputed to have unearthly powers.