Rika is an active individual who always looks on the bright side of conditions, in contrast with her polar opposite Saori. Described as "The Life of the Party in Merm4id", she can bring anyone into her fun sprees with her charismatic personality, and particularly gets along with the high-spirited members of the other units. Although one could assume that she is nothing but a wild party animal, especially due to her reputation around the campus, in reality Rika is highly empathetic.