Tsubone is the wife of Kuki family's head and Kuki group's president Kuki Mikado. She is the mother of Ageha, Hideo and Monshiro. She raised her three children to know the honor and pride of the Kuki family, and to live by the code of their family "they were born to rule the others". Tsubone also has a scar in her forehead that is classic in the members of Kuki family. Tsubone made her all three children to attend to Kawakami Academy to polish their skills. She also designated the personal butlers and maid to their children. To Ageha who was the most independent, clever and strongest of the three, she designated Kojurou to help her relax at times and learn to not take everything so seriously. To Hideo who lacks a little of common sense and still needs to polish his skills, she designated him Azumi, Kuki Group's best maid. To Monshiro who has the wisdom but lacks strength, she designated a whole squad to protect her. Tsubone knows to be harsh with her children but she cares a lot for them, and hopes that they also succeed their destiny (rule the world). [Edited from Majikoi's Wiki]