Tara King
From Jenny Everywhere Wiki
T. King was a “known associate” of Jenny Everywhere in at least one incarnation, as was J. Steed, according to a wanted poster jointly put up for Jenny by a number of organisations who wished to bring her in for questioning. (PROSE: Wanted for Questioning)
Behind the scenes
Tara King, portrayed by Linda Thorson, was the successor to Emma Peel as John Steed's assistant on The Avengers, a competent spy with a romantic infatuation with Steed.
She has also been referenced in the Doctor Who universe, having, according to the novel Verdigris, gone to school with the Doctor's companion Jo Grant.