He is the fighter of the male Zero pair. He is one of Nagisa's experiments, and presumably the second generation of Zeros. He first makes an appearance in volume 2, when he and Youji corner Soubi when he's alone. When Soubi wins the battle, Natsuo tells him that he and Youji have no place to return to if they lose a battle. Soubi offers to let them live at his apartment, and Natsuo warily accepts.    (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)

__Height:__ 168cm

[Agency (Ken Production)](https://www.kenproduction.co.jp/talent/35) | [Twitter](https://twitter.com/SaigaTweet)

__Non-Anime Roles:__
~!Zarya/Aleksandra Zaryanova (Overwatch)
Garnet (Steven Universe)
Link (The Legend of Zelda: A Link Between Worlds) (The Legend of Zelda: Link's Awakening)
Hero (Dragon Quest XI S: Echoes of an Elusive Age)
Hero/Luminary (Dragon Quest XI) (Super Smash Brothers Ultimate)
Meleph/Morag (Xenoblade Chronicles 2)
Zen Kubota (Zanki Zero: Last Beginning)!~

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)

Natsuo Sagan