Hana Midorikawa is a prominent character in the anime series Kangoku Gakuen, also known as Prison School. She is a member of the Underground Student Council and holds the position of Secretary. Known for her serious and disciplined demeanor, Hana is a martial arts expert and often uses her skills to enforce the council's strict rules. Despite her tough exterior, she occasionally shows a more vulnerable side, especially in her interactions with the male students. Her complex personality and dynamic presence make her a key figure in the series' comedic and dramatic moments.