She is the mother of Seimei and Ritsuka. She has an important influence over her sons. Being emotionally and mentally weak, Misaki has very little grip on reality, and often hallucinates, particularly after certain events in volume 5. She is abusive and violent and blames Ritsuka's personality change for the reason Seimei "left", demanding that she wants her former Ritsuka back when she beats him. To many, she is seen as a cruel villain, but in volume 5, she has inner dialogues of her own, allowing the reader to witness a more human, fragile side to her behavior which she cannot control.  (Source: Wikipedia)

Twelve-year old Aoyagi Ritsuka is left with his insane mother as his only family when his brother, Seimei, is killed suddenly. After moving to a new school, he meets Agatsuma Soubi, who claims to have known his brother. Ritsuka eventually discovers that Soubi and Seimei used to be a fighting pair, whereby Soubi was the "Fighter" and Seimei was the "Sacrifice". Now that Seimei is gone, Ritsuka has inherited Soubi, who will become his "Fighter". After learning that Seimei was killed by an organisation known as the "Seven Moons", Ritsuka decides to investigate into his brother's death, with the sometimes useless help of Soubi, along the way.
 
(Source: Anime News Network)


__CV:__ [aoni.co.jp](http://www.aoni.co.jp/actress/ya/pdf/yamazaki-wakana.pdf)

Aoyagi Ritsuka is one troubled 6th grader. Two years ago, he mysteriously lost his memory and developed an alternate personality. His mother constantly berates (and occasionally beats) him, asking what happened to the "real" Ritsuka, and his only defender and friend, his older brother Seimei, was recently killed. 
Suddenly, Seimei's apparent "friend," Soubi, appears. Soubi tells him that Ritsuka's true name is "Loveless," and that Soubi was assigned by Seimei to take care of Ritsuka and protect him. Ritsuka soon gets sucked into a bizzare underground society where teams of people, a "Fighter Unit," and a "Sacrifice," battle using elaborate and beautifully-phrased spells. 
He seeks both acceptance of himself, and the answer to the mystery of who killed his brother and why. 
(Source: Tokyopop)

Misaki Aoyagi