Ruka is a young woman with defined facial features, such as her sharp nose, long eyebrows, and pale complexion. She has large dark red eyes with semi-long black hair tied loosely at the end in a ponytail. She has a demon slayer attire. She is depicted as being wise, gentle and graceful. She is seen as having strong morals and paid mind to rules. She is a demon slayer who understands the importance of her life and the need to use her strength in order to protect the weak and helpless people