Battle Royale is a movie series of two movies about a purge within a group of high school kids called BR Act in Japan. Shuya Nanahara is one of the main characters in the series. In the first movie of the series, Shuya is one of the two kids that can survive and escape from the purge. In the sequel Battle Royale II: Requiem, Shuya form a team called Wild Seven with other survivors from previous BR Acts. They aim to revolt the government who founded BR and the adults who supported the program.
As Wild Seven started having actions, the government reform the BR Act into a program that forces a group of high school kids to kill Shuya and the Wild Seven and called it BRII Act. And that is what this sequel mainly shows us.
Through the movie, it feels like Shuya is still weak inside even though he is the leader of the team and have been surviving for years. He still has a kind heart within him but also too emotional. However, the movie shows that even the weak side can still win the war. I think the group of young resemble Japan And the government is a symbol of the world.