Hana Mizuki

Hana is Ageha's twin sister. Ageha defines her sister Hana as the better looking one, and very popular. They look very identical, but Hana wears more make-up and curls her hair. She has many guys that like her and she shows off to them. Ageha and Hana have an okay relationship, until Hana cracks and she can't have her sister Ageha being happy. She shows up on her sister's date with Ryuusei, and steals him away. Later Hana and Ryuusei began dating. The reason why Hana wants to take all of Ageha's love intrests is known in later chapters, "I can't stand seeing her happy!"