An umamusume that relies solely on her calculations. A lady that knows how to seemlingly plan and figure out how to precisely train and hone her skills on the track. Almost every challenge to her is a puzzle to be deciphered. The polar opposite of her sister, Narita Brian, where Brian relies on power and natural talent. Now Christmas has arrived, and Biwa is now in the spirit of the season with a new outfit. A gift from close friends and fans, but nonetheless will keep striving for results...