Mana Tendou is a prominent character in the anime series 'Kono Naka ni Hitori, Imouto ga Iru!' She is a student and the head of the student council at Miryuuin Academy, where the protagonist, Shougo Mikadono, attends. Mana is known for her strict demeanor and sharp intelligence, which she uses to maintain order in the academy. Despite her stern exterior, she occasionally shows a softer side, hinting at deeper layers to her personality. Her interactions with Shougo are significant as they add complexity to the storyline, exploring themes of identity and familial bonds.