Yūsaki Riko

Riko Yuusaki is Rito's female alter-ego, who is accidentally created through Rito being transformed into a girl by one of Lala's bizarre inventions. She is a beautiful girl (with a physical appearance resembling a tomboy) who gets much attention from men, such as Taizou Motemitsu, the principal and even Kenichi Saruyama, Rito's best friend. Later, Saruyama falls in love with "Riko-chan" and asks Lala to invite her for a date; out of pity, she forcefully changes Rito into "Riko" so Saruyama can go on a date with Riko. After that Riko only appears for short amount of times at rare occasions. While as Riko, it is often stated that she is Rito's, and Mikan's cousin to avoid suspicion.