Hibiki Shikyouin (紫京院 ひびき)
Background
Her alter ego in PriPara is the "Thieving Genius."
Hibiki is a fair skinned young woman with lime-green eyes. Hibiki has short, silver hair worn in a boys cut that frames the face.
At first glance Hibiki comes off as a kind and charming individual who's also fairly humble, however it's soon revealed that's not entirely the case. In reality, she is cunning and manipulative, seeming to have no problem using others for her own agenda.
Hibiki is fixated on finding the "Best Princess" for reasons that are currently unknown. She believes that not everyone can be an idol, which, given the nature of series, makes her appear nihilistic and cynical. Because many of her motives are shrouded in mystery, this, combined with her personality gives her an overall shady character.
(Source: Pri Para Wiki)