Charlotte Pollard

Charley Pollard was a female Human companion of the Eighth Doctor and the Sixth Doctor.

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 the TARDIS as his newest companion.

With the Sixth Doctor
Following the death of C'rizz (BFA: Absolution), Charley requested the Eighth 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 Sixth Doctor waiting inside... (BFA: The Condemned)

Paradox: Interestingly her travels with the Sixth Doctor create a paradox. From Charley's perspective she traveled with the Eighth Doctor first and then the Sixth. However from the Doctor's perspective he traveled with Charley as Six before he met her as Eight meaning that when he met her for the first time (as Eight)in Storm Warning he should have recognized her. ''It is possible he did recognize her, but merely knew she should not know it. This would account for his being so sure she should not be dead yet, as she had not yet traveled with his sixth incarnation''