Yuzuko Mawatari

Yuzuko is Natsuos main rival throughout the story. Born in Japan she moved with her parents to Brazil. While there she became an exceptional MMA fighter under the training of Mario Cordeiro. She is the captain of the budding MMA club at the Natsuos high school and is close friends with Mario Cordeiro daughter Ringi. It is two early fights with Yuzuko that drive Natsuo to become an MMA fighter. Yuzuko has no talent but makes up for this limitation with pure tenacity and a singleminded focus on moving forward. As a result Yuzuko often comes off as creepy by others who are disturbed by the level of enjoyment she derives from MMA.