Thea was a member of a 21st century community in the Sussex Downs that eschewed any technology that they could not understand and control.

In 2040, she told the Seventh Doctor that their community had no leader, though she acted as leader in their dealings with the Doctor. Thea chided Bella for being in love with Saul, as their community considered confusion of emotion to be an act of weakness. (PROSE: Daisy Chain)