Keisuke is Miaka's older brother. He's very protective of Miaka and always thinks what's best for her. At first, when he heard the story about The Universe Of Four Gods from Miaka, he had problems believing her but to make sure, he told her not to go near the book. In spite of that, Miaka went and he went after her. It was not until when he saw her disappear into the book, did he believe the story and throughout a large part of the anime, he is the one who reads the book and at the same time tries to figure out how to help her return to the real world. (Source: AnimeNfo)
Ruri is Sango Himeyuri's younger twin sister. She loves her sister very much and believes that they only need each other. She dislikes Takaki and treats him like a pervert when he helps Sango. She does not want anyone interfering in her life with Sango. But otherwise, she is a nice girl who only wants her sister's happiness.
Quick Facts - He is 17 years old at the beginning of the story - His qualities include: hard working, greedy, caring, strong, compassionate, loyal, funny, determined, courageous. - His two most favorite things are money and Miaka. - He is one of the seven star warriors of Suzaku and bears the sign ‘oni’ on his forehead. Which is best translated as 'ogre' or 'demon' and in chinese: 'ghost'. Because of this, he is greatly misunderstood and was even teased in childhood! - His blood type is O, he is 180 cm tall or 5’11 and he was born on June 28, thus being a cancer. - He lives or lived in Kohnan with his two brothers and two sisters, Chuei, Gyokuran, Shunkei, and Yuiren and his father. His mother died when Yuiren was born. - His real name is Sou Kishuku and his abilities include: Martial Arts and Chii Blasts. Tamahome (鬼宿?), the first of the seven Celestial Warriors of Suzaku whom Miaka meets, comes into the story when he saves Miaka and Yui from slave-traders. Born in the country of Kounan (Hong-nan) Village of the Juusou (Shou-Shuang) as the eldest son of a large family, he is seventeen years old. His true name is Kishuku Sou (ç�® 鬼宿, SÅ� Kishuku?) , based on the star Demon (鬼). Tamahome appears the strongest member of the Suzaku warriors. An adept martial artist, proficient unarmed and with weapons, he proves a good street-fighter and can channel his ki into energy-blasts. When emotionally motivated, he is able to use his ki to increase his strength, speed, and reflexes in combat. Tamahome is also experienced in fencing thanks to being trained by Tokaki. Initially, the story portrays Tamahome as a greedy young man, interested in helping others only if it means getting paid for it later. It is eventually revealed that his interest in accumulating money derives from trying to support his family. He comes across as cheerful, vain, and comic, but is actually shy and emotionally strong. Throughout the series, he demonstrates himself to be a sincere young man who is willing to sacrifice himself for the sake of others and unwilling to back down from enemies. While he initially rejects Miaka's feelings for him, he comes to reciprocate, realizing all along how deeply his feelings for her had been. They develop a strong romantic relationship to the point where Tamahome is able to sense Miaka whenever she calls for him. Though it is Miaka's wish for them to be together, it is a wish that Suzaku cannot grant; thus, Miaka uses her final wish to restore The Universe of Four Gods and the two are separated when Miaka returns to her own world. However, after Miaka's junior high school graduation, she is introduced to a new classmate of her older brother. Tamahome comes back showing the ring that symbolizes his marriage to Miaka. (Source: Wikipedia)
Taiitsukun helped Miaka find seven guardians of Suzaku by giving her scroll and mirror and told her the way to return to her world.
Tetsuya is one of Keisuke's friends. When Keisuke first tells him about Miaka and Yui going into "The Universe of the Four Gods" he is skeptical. Eventually he becomes a believer and helps Keisuke discover the true nature of the book. (Source: Wikipedia)
Nuriko first appears disguised as "Kourin" in Emperor Hotohori's harem, which Hotohori never visits except to welcome new maidens. "Kourin" was in fact Nuriko's younger sister, who died at a young age; he began behaving and dressing like her to keep her memory alive. Born in Eiyou, the capital of Konan, Nuriko possesses superhuman strength and is later granted a pair of bracelets that transform into strength-increasing armbands by Taiitsukun. He is 18 years old. His true name is Ryuuen Chou, based on the star Willow. While prone to jealousy, quick to anger, and possessing a calculating tendency, Nuriko is very level-headed and compassionate and shows the most concern regarding Miaka and Tamahome's relationship. As a "woman," Nuriko is infatuated with his fellow warrior, Hotohori, but as a man, he also loves Miaka Yuuki. While initially jealous of Hotohori's love for Miaka, Nuriko and Miaka become close friends. After Nuriko comes to terms with the fact that his cross-dressing resulted from the unyielding pain of losing his sister Kourin, he concludes that he had been trying to live his life as Kourin would have, not as he would have. This revelation allows him to finally allow himself to experience life as a man. He cuts his hair, which once hung down to his waist in a braid, and admits to Tamahome that he loves Miaka as more than a friend. While he maintains his feelings for Hotohori, Nuriko eventually chooses to stop dressing as a woman in order to better protect Miaka. Throughout the rest of the series, even after his death from Ashitare, one of the Seiryuu-seishi, the friendship between Nuriko and Miaka remains strong. Nuriko is the first of the seven Suzaku warriors to die. In Fushigi Yuugi Eikoden, Nuriko was "reborn" at a local marketplace as a young girl named Ko Keishun. She also steals the magic ball Tasuki has, and breaks it. Despite the young girl's size, she is able to lift a heavy rock much like Nuriko, revealing that she is indeed Nuriko's reincarnation. In the last few episodes before he died, he revealed that he fell in love with Miaka. (Source: Wikipedia)