Autumn Somber is the daughter of The Pre-Corruption King Sombra and Autumn Gem.
Autumn Crystal is the daughter of Sombra and Autumn Gem. She was born after her father was corrupted, and never knew he was her biological father. When the Crystal Empire was saved by The Mane 6, Autumn and her mother became very close, and soon was told about her real father.
Her scarf is the one that King Sombra wore in the fan-animation "Tale of One Shadow"