Kisaragi, Haruna

Yui's best friend. She possesses a polite, calm, and caring personality. Her intelligence and natural aptitude for computers make her an ideal candidate for the role of Corrector, just as Dr. Inukai anticipated. She was originally intended to be a Corrector from the start, but I.R. mistook her for Yui due to Grosser's interference.
While Dr. Inukai was transferring Corrector tasks and abilities to her, she was manipulated by Grosser, who transformed her into Dark Angel Haruna; however, Yui eventually rescued her. In the second season, she returns as a Corrector to aid Yui, initially when Yui was petrified by infected insects, and subsequently, supporting Yui until the conclusion of the second season. Interestingly, she is able to utilize Element Suits more effectively than Yui.