Helen Fitzmaurice
From Tardis Wiki, the free Doctor Who reference
Helen Fitzmaurice was Lawrence Grainger's niece and Edward Grainger's cousin. According to Edward, his father considered her "unbalanced". Margaret Pollard's mother called her a "liability". She often had moments where she was unaware of her surroundings.
Helen had an imaginary friend, Ahnji, who was in reality an alien that had been trapped in a graphaphone. When he was freed by the Third Doctor, Helen was cured of her strange behaviour. (PROSE: Echoes)
