Lydia was a member of the Watchers Council.
Along with Quentin Travers and several other Watchers, she traveled Sunnydale to test the Slayer, Buffy Summers, to see if she was eligible to the Council's information on Glorificus. As the Watchers Council interviewed Buffy's friends, Lydia nervously questioned Spike and blushingly admitted that she wrote her thesis on him.
Behind the scenes
- She was played by Cynthia Lamontagne.
- The shooting script for "Checkpoint" reveals that the Watcher's name is 'Lydia,' but her name was not revealed on-screen until two years later in the episode "Never Leave Me".