Gillian Chamberlain

Gillian Chamberlain is an American witch who teaches at Bryn Mawr. She sometimes studies in the Bodleian Library at the University of Oxford in Britain in the world of the All Souls Trilogy. She has hazel eyes and shiny black hair.

A Discovery of Witches
Gillian tries to bring Diana Bishop into the Oxford witches' coven. When Diana doesn't participate, Gillian warns Diana that she will find trouble just like Diana's parents did. Gillian accuses Diana of keeping secrets from other witches. Matthew Clairmont says that Gillian wanted to be on the Congregation, and believed that witches and vampires should remain apart. He says that Gillian was watching Diana to try to get information about her so Diana could be controlled by the Congregation. She liaises with Peter Knox to send Diana a photo of her parents threatening her not to keep secrets. This act of aggression results in her death at the hands of Matthew de Clermont in early November.

Introduction
Gillian presents herself to humans as a perfectly respectable, if slightly dowdy, college lecturer in Greek history, who’s forever hoping to become a professor. Where Diana keeps herself apart from other witches, Gillian is an enthusiast, whose ultimate ambition is to rise through the ranks of the Oxford coven. Gillian is a staunch supporter of the Covenant, which forbids inter-species relationships, and believes that Vampires are no better than animals.

Adaptation Changes
Gillian is an English witch and a friend of Diana's from their graduate school days. She is not initially antagonistic, but she is influenced by her prejudice against vampires and manipulation by Peter Knox to share information on Diana's activities. When she is found to have broken into Matthew's lab, he drinks her blood to view her memories but stops short of killing her.

A Discovery of Witches Season 1

 * Episode 1 (Season 1)
 * Episode 2 (Season 1)
 * Episode 3 (Season 1)
 * Episode 4 (Season 1)
 * Episode 5 (Season 1)

Trivia

 * She is credited in Episode 6 (Season 1) but does not appear onscreen.