Mizu is a mixed race, disguise as a man when she is truthfully a woman. But she is a greatest swordsmen alive and a skillful at combat. Her personality is stoic, cold, isolated person, she loathed herself because of her looks and blue eyes. Bullies when she was 6 years old and no difference when she grows up. Made sure she covers and hides all her feminine parts and makes her voice deepens as a man. Is comfortable in a masculine clothes but she doesn't know how to be a woman.