Anego

Another classmate, Anego is one of Punie's 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 Punie's 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)