Aoi Ogata is a junior secretary of President Takishima, Kei's grandfather, and often serves as the President's emissary. He is nineteen years old. Aoi has a cold and calm character, and has always been expressionless, not smiling even once, but is actually kindhearted and socially awkward in some respects. Like Kei, he has the ability to see something only once and memorize it, though his ability made him a victim of teasing as a child. He first met Kei when he was eight and Kei was five, and came to admire and deeply respect Kei, coming to see him as an almost kindred spirit. Aoi initially appears when he is sent to Japan from London, on orders to convince Kei to transfer to London, which had been planned by Kei's grandfather. When Aoi discovers what is causing Kei to hesitate, Aoi tries to eliminate the problem: Hikari. He tries to threaten her, and Kei tries to beat Aoi up for threatening Hikari, but fails; even though he knows he is not going to convince Kei. Aoi then tries to bribe her but ends up having a cheque ripped to pieces by Hikari. At sometime, Hikari confronts Aoi and they both make up the "After School Takishima Fan Club," in which Aoi is the president and Hikari gets pictures of and writes up reports about Kei and sends them to Aoi. Afterwards, he realizes that he should not pressure Kei into the situation that he is not ready for and also realizes that he is most at peace when he sees Hikari and Kei smiling. He first appears in chapter 28.
When the S.A is punished by the director of the school as a result of Tadashi lying to her, they are forced to attend a regular high school where Akira meets Yui, a girl who resembles her childhood friend Sayo. Initially wary, Akira avoids contact with her, but eventually apologizes and befriends her. However, Akira's fear that Yahiro would break up her newfound friendship results in Akira using extreme measures to protect Yui, who begins to feel awkward around her friends. When Yahiro investigates her for Akira's sake, he discovers that Yui stole some of Akira's jewellery and threatens her so that she will stay away from Akira. Though Yui had done so reluctantly because her family had financial issues that were forcing them to move, she agrees to Yahiro's demand, but she feels that she needs to say goodbye to Akira and almost gets hit by a car in the process. Yahiro saves her and they end up in Yahiro's home, where Akira finds them. When Akira believes that Yahiro has hurt Yui, Yui clarifies that Yahiro saved her and apologizes to Akira for stealing her jewellery. Happy that they are still friends, Akira ends up helping Yui's family and they keep in touch.
Chitose is the younger brother of Yahiro and is about nine years old. He initially appears in (Chapter 13) Hawaii during the SA's summer vacation when Ryuu (and by extension, the rest of the SA) is forced to entertain Chitose because he is the son of a client for his family. He is close to Ryuu, much to the chagrin of the twins, and it is implied that he has known Kei for a long time. Like his older brother, he dislikes poor people, which leads him to treat Hikari differently from others at first. However, when Hikari shows genuine concern for his well-being despite how badly he treated her, Chitose quickly becomes attached to her.
Birthday: October 25 Height: 186 cm Weight: 65 kg Blood type: A Seto Kaiba is the majority shareholder and President of his own multi-national company, KaibaCorp, who aims to become the world's greatest player of the Duel Monsters card game. To accomplish this goal, he must defeat his arch-rival, Yugi Muto. He is largely considered an anti-hero, as his motives are usually ego-centric, but in several cases towards a good cause. Among one of the recurring plots in Yu-Gi-Oh! Duel Monsters is Seto Kaiba being forced to deal with either people adversely affected by Gozaburo Kaiba's actions wanting to take their revenge on Seto Kaiba, or people from within KaibaCorp attempting to take over the corporation.
Kaiba's little brother. Mokuba is always following Seto where ever he goes. He has a very strong bond with his brother and has all of his faith within Seto as well. Mokuba helps run Seto's company and will do what ever it takes to please his brother.
Hajime is a new club member, and is the protagonist of the story. (Source: Wikipedia)