Unity Valkyrie Mitford (August 8th 1914 - May 28th 1948), one of the Sisters Mitford born with London and cousin of Clementine Hozier, which married Winston Churchill. She was educated with St Margaret' S School in Bushey, Hertfordshire.

Unity Mitford goes in Germany, where it meets Adolf Hitler. In September 1939, by learning that the United Kingdom enters in war against Germany, she writes a letter of good-bye in Hitler and draws a ball in the head. The suicide attempt fails, but causes important cerebral damage and Unity Mitford is repatriated in the United Kingdom where she lives with her mother. In 1948, she dies of a meningitis caused by the swelling of the brain around the ball.