Anego

Another classmate Anego is one of Punies rivals. She is the leader of a girl gang that are trying to maintain a position of power at the school while causing general mayhem. She later befriends both Punie and Tetsuko. Also most of the time throughout the series Anego is always suspicious of Punies evil intent. Because of a crush she has on a boy in her class she also exhibits the qualities of a tsundere character. Source: Wikipedia