A. Frankensteiner is a German middle school tennis player representing Germany in the U-17 World Cup. At 13 to 14 years old, he stands 194 centimeters tall and weighs 86 kilograms, with a sturdy build, spiky brown hair, and an imposing stature that often leads to initial misunderstandings. His mechanical precision and analytical prowess on the court have earned him the nickname "Cyborg." Despite his robotic playstyle, he displays emotional expressiveness during matches, and his smile—sometimes perceived as intimidating—comes from genuine happiness. He has a kind-hearted nature, a particular affection for animals, and an ambition to create a dog-shaped robot. His daily habits include patrolling for suspicious persons, and he is skilled in embroidery, machine repair, and object searching. He enjoys Schneeballen and Baumkuchen, favors the color yellow, reads Grimm’s Fairy Tales, and cherishes Neuschwanstein Castle. In the Pre-World Cup Exhibition Match, he partnered with professional Jürgen Borisovich Volk against Japan’s Seiichi Yukimura and Kazuya Tokugawa, identifying weaknesses in Tokugawa’s "Black Hole" technique by targeting gaps between swings, helping secure Germany’s 6-3 victory. His tennis style is right-handed counter-punching, emphasizing relentless returns and strategic shot placement, using a Yonex Ultimatum Rd Ti 50 racquet and Prince Claymaster shoes. He possesses instantaneous analytical vision and exceptional ball control, with minimal deviation in shot accuracy. He teaches German to teammate Kunimitsu Tezuka and strictly adheres to Germany’s rigorous training regimen that emphasizes leg strength and prohibits unauthorized self-training. He built a robot at age four, and his personal quirks include becoming flustered when children ask him to "shoot beams."