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"book series about a girl who has power to control the night or shadow. She is imprisoned in a monastery for war crime she cannot remember. Her parents were killed. She was adopted by a girl about her age, they call each other sisters. Her sister becomes the King's general. Later the king's general seeks the help from the main character in exchange for her freedom. The main character joins the rebels, who are actually traitors. Main character also has a friend who is a Monk, who later gets blessed by a goddess with power to control fire or the sun. "