Mana

Mana is a supporting character of the manga, "You Are Indecent, My Queen", better known as "Kimi wa Midara na Boku no Joō". She is the younger sister of main character, Subaru. After moving to the same school as Subaru, she comes to find out that Subaru and her childhood friend, Saito, are in a relationship. Mana rejects the relationship at first and threatens to tell her father about their actions if they (Saito and Subaru) cannot show her "true" love.