Shu Kurenai is the deuteragonist of the anime and manga series, Beyblade Burst. He currently battles with his Beyblade, World Spryzen Unite' 2B. In addition, Shu is one of the Supreme Four, and a member of the Big Five Described as a genius blader, Shu is a favorite in his hometown. However, he does not rely on talent alone and is very hardworking when it comes to Beyblade. He is one of the best bladers to ever play the sport, managing to surpass Valt Aoi and win his first WBBA tournament in less than a year. Shu is calm and patient, and prefers to be alone most of the time. He maintains a cool exterior in front of others, however underneath this lies a burning hot fighting spirit. He is quite standoffish towards people he doesn't know well, with Valt and Xander Shakadera being exceptions. Because of this, he is sometimes seen as aloof and even as a 'spoiled brat', as described by Rantaro Kiyama in the first episode of the anime. However, despite his usual stoic demeanor, Shu cares deeply for his friends, especially Valt (being his best friend); and will always help them out or give advice to them when they need it.