Ako Sunomie is one of the twin sisters in the anime series "Kiss x Sis." Known for her vibrant personality, Ako is the older twin, characterized by her playful and sometimes mischievous demeanor. She has a strong bond with her twin sister, Riko, and both have developed romantic feelings for their stepbrother, Keita. Ako's character often brings a mix of comedic and heartfelt moments to the series, as she navigates her feelings and the complexities of familial relationships in this unique romantic comedy.