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.