Diana Arsenyevna Balakireva is a 16-year-old supporting character in the anime. She has blonde hair cut to ear length and red eyes, and is typically seen wearing accessories such as a hair ornament, gloves, tights, and a cravat. Diana is the sister of Maxim Arsenyevich Balakirev and the twin sister of Lyudmila Arsenyevna Balakireva. She is characterized by a high level of pride. In a manner similar to her sister Lyudmila, Diana holds a deep and reverent admiration for her brother Maxim. No further information is available regarding her personal motivations, her specific role in the overarching story, her key relationships beyond her immediate family, any character development she may undergo, or her notable abilities.