Charlotte Pollard

Charley Pollard was a female Human companion of the the Doctor in his sixth and eighth incarnations.

Biography
She was born on 15th April 1912 into a well-to-do family; her mother was Lady Louisa Pollard and she had two sisters, Margaret and Cecelia. Charley and her siblings grew up in a manor house in Hampshire, looked after by servants. Charley rebelled against this existence and, styling herself an Edwardian adventuress, ran away from home seeking excitement. Making an appointment to meet a young man in Singapore on New Year's Day 1931, she stowed away on board the R101 disguised as a male member of the crew. There, she met the Doctor and together they discovered the secret mission the airship was on. She was rescued from the fated crash of the R101 by the Doctor and taken on board his TARDIS as his newest companion. (BFA: Storm Warning)

Following the death of C'rizz (BFA: Absolution), Charley requested that the Doctor take her home. However, after a battle with the Cybermen, Charley was stranded on a desert island in 500,002 (BFA: The Girl Who Never Was). However, when the TARDIS did arrive for her, she found the Doctor, but in an earlier incarnation (BFA: The Condemned). Because of her travels with the doctor's future she knew not to let the doctor find out any thing about her past, but the doctor started to grow suspicious of her misteriousness.