Danya is a 12-year-old student who lives in Saint Petersburg, Russia. She enjoys several subjects in school and her favorite hobby is doing sports and martial arts. Danya has won numerous medals in international competitions. Her coach and teacher is Dennis Sergeyevich Chemodanov, who teaches martial arts and a philosophy of living a healthy lifestyle. Dennis has received many honors for his coaching and has held leadership roles in several martial arts organizations. He is praised as a reliable, fair, and wise teacher.