SpoilerGender: Female
After seeing his swordsmanship, Dororo decides to follow Hyakkimaru. Dororo was a thief before meeting Hyakkimaru.
SpoilerDororo's bandit father Hibukuro was wounded by a samurai official and later died. Her mother froze to death while fleeing in the snow, but before she died she drew a map on Dororo's back to locate money hidden by her father at Bone Cape.
Hyakkimaru learns that Dororo is female with the latter continuously insisting she is a boy, though this is because her parents raised her as one.