Ka Ryo Ten, often known simply as Ten, is a central character in the anime and manga series 'Kingdom'. She is a young girl from the Mountain Tribe who initially disguises herself as a boy to join the main protagonist, Shin, on his journey. Ten is highly intelligent and resourceful, serving as a strategist for Shin's army. Throughout the series, she evolves from a supportive role to a key player in the battles and political intrigue, using her keen mind to help navigate the complexities of war and leadership.