Riko Suminoe from Kiss×sis is a manipulative, seductive, yet ultimately kind and shy high school girl, twin sister to Ako, who uses her charm and authority (like the disciplinary committee) to get close to her stepbrother, Keita, displaying a complex personality driven by desire, but also showing softer, more modest sides, often seen in her appearance with neat school uniform or casual wear, typical of anime characters with her archetype.