Natsumi Madoka is a central character in the anime series "Bokura no Nanokakan Sensou" ("Our Seven-Day War"). She is a spirited and determined high school girl who plays a key role in the story's rebellion against adult authority. Natsumi is known for her leadership skills and strong sense of justice, which inspire her peers to join the cause. Her character is both a motivator and a strategist, making her essential in organizing and executing plans to challenge the status quo and fight for the freedom and rights of her friends.