Ruka has defined facial features, such as her sharp nose and long eyebrows. She has large dark red eyes with circular white pupils, similar in appearance to the Kamado family, and a small mouth, with semi-long black hair tied loosely at the end in a ponytail. As opposed to her husband Shinjuro's loud personality, Ruka is depicted as being wise, gentle and graceful. In the manga, she is seen having strong morals, teaching Kyojuro the importance of his life and the need to use his strength.