Sonken Riku is a fictional character from the anime series Koihime Musou, which is a reimagining of the classic Chinese novel Romance of the Three Kingdoms. In the series, Sonken is portrayed as a young, cheerful, and resourceful warrior with a strong sense of justice. She is the leader of the Wu faction and is known for her strategic insight and leadership skills. Riku is characterized by her optimistic outlook and her dedication to her friends and allies. Her role in the series is pivotal as she strives to unite the land and bring peace to the chaotic world.