Rias is a beautiful young woman with a voluptuous body, white skin, blue eyes inherited from her father, Zeoticus, and a buxom figure. Her most distinctive feature is her long, beautiful crimson hair which she also inherited from her father, that reaches down to her thighs with a single hair strand sticking out from the top. Her hair also has loose bangs covering her forehead and side bangs framing her face. Rias is very kind and compassionate, especially to her servants and people close to her.