A beautiful girl with unbelievable strength, Nagi is Kei's cousin and is a year younger than him. She appears during a brief vacation the SA take at Akira's villa, where they intend to celebrate Kei's coming birthday. Extremely arrogant and full of pride, Nagi proclaims herself to be Kei's fiancée and loves him very much. However, she quickly becomes jealous of Kei and Hikari's closeness with one another and ends up acting unpleasantly towards the rest of the SA in order to get Kei's attention. Upset that Kei, the only person she feels comfortable around, cares more about Hikari, Nagi tries to get rid of Hikari, who comes to see that Nagi only wants to please someone she cares about. Afterwards, the two reconcile and become friends. (Source: Wikipedia)
Izumi Takishima is the mother of Midori Takishima and wife of Kaname Takishima.
Birthday: February 14 Bloodtype: AB The brother of Megumi, he's usually a nice guy though not much is known about him. It is known that whenever he is kissed by a girl or major affection is going on, he turns into a bad boy (he has a split personality). He, too, has an odd attachment to Ryuu, but is dating Sakura. He is 3rd in 10th grade. (Source: Wikipedia)
Atsushi is Hikari's older brother, a calm individual who does not fail to give Hikari his honest opinion. He is currently a junior in high school and attends a normal high school. Unlike Hikari, he dislikes fighting and has refrained from any physical fights and yelling since he was little. This is because when they were very young, Hikari saw Atsushi beating up a boy who hit her and his facial expression was so scary to her that she fainted. However, when he feels his sister is in danger he breaks away from his peaceful nature and will not hesitate to beat someone up. Even now, Hikari still becomes terrified whenever he becomes truly angry.
First appearing in chapter five, Hajime Kakei is the Student President at Hakusenkan and holds first place in the class 2-A. He is frequently hospitalized for feeling weak and relies on using money to get what he wants. He begins to send various challenges to the SA when nobody appears at his talk show; since none of the SA members wanted to attend his show, nobody else in the student body wanted to either. Because of Hikari's open and kind nature, he seems to develop a crush on her, though is always scared off by Kei before he gets any chance to express his sentiments. He is not very popular among his classmates, most of whom do not share his animosity towards the SA. (Source: Wikipedia)
Somewhat the 'leader' of the Ping Pong Club. He has a strange demeanor and enjoys any conversation or subject involving his glorious 'ass', of which he is very proud. Contrary to the belief that his strange and perverted attitude would repel girls, it actually attracts them (as well as his good friend Izawa).
The quintessential 'pretty boy' out of the two in Ping Pong Club. He, like Izawa, has hair down to his shoulders and is the most popular and cool guy in the whole school, constantly having girls chase after him. (Source: AniDB)