Boko Bear is a fictional character within the universe of the anime series "Girls und Panzer." Boko is not a human character but rather a mascot bear, depicted as a stuffed toy with a distinct appearance. Although Boko doesn't play an active role in the tank battles, it is a beloved character by the protagonist Miho Nishizumi's sister, Maho. Boko symbolizes the innocence and childhood nostalgia amidst the intense and militaristic themes of the series, providing a subtle contrast to the competitive nature of tank warfare.