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Though you may know her best from the Disney film, she was originally imagined in the 6th century Chinese ballad. She has since been reinterpreted in various literary and non-literary forms. The traditional figure is seventeen years old, already a martial arts and weapons expert — just things she picked up on the side because she was too smart to be totally happy with her life of weaving. She goes to war in place of her father, wins all over the place, and then comes home and returns to her normal life.
Who is Hua Mulan, The Ballad of Mulan