Sanshi is the Nyokai of the black Kirin Taiki. During the many years following the disappearance of Taiki's ranka she searched for him relentlessly while everyone gave up, and finally was able to help retrieve him from the human world. She hasn't left his side since, following him even when he returned there. After Taiki's horn was cut, her source of food (the chi of a kirin) was cut as well and she started to go insane, gradually killing those around Taiki as she viewed them as "threats".
Sairin is the current kirin of Sai. Before selecting Kouko as the monarch of Sai, Sairin had chosen a king known as Shishou, who climbed Mount Hou after the death of the king who preceded him. At the beginning of his reign, he presented Sairin with the royal treasure of Sai, a jewelled branch called the kashokada, as a promise to rule his country well and bring about prosperity. However, during his twenty year reign, his actions caused Sairin to contract shitsudou. Realizing he had lost the way, Shishou ascended Mount Hou to abdicate the throne and took his life. Sairin chose Kouko as the next king and continues to always carry a branch with leaves on it, as a memento of the broken promise Shishou had made to her that he would govern his country well. (Source: wikia)
Keikei is a little boy who lives in a rike with his older sister, Rangyoku, and Enho. He and Rangyoku originally came from the Wa Province and their parents died late in the reign of Jokaku, when all the women of the country were being exiled. When the new ruler of Kei ascends the throne, Keikei is especially excited about the good news. He and his sister settle down in the province of Ei, where Rangyoku helps Enho with household tasks. When their rike is attacked by youma, they are saved by the arrival of Chuu Youshi, a young woman who has come to study with Enho. Keikei and Rangyoku quickly become her friends. When their rike is attacked men working for Gahou, the governor of Wa, while Youshi is away, Enho is abducted, Rangyoku is fatally wounded, and Keikei is badly injured. When Youshi returns, she arranges for Keiki to take Keikei back to the physician in the Goldenwave Palace. His injuries weigh heavily on Youko's mind and she is relieved to learn from Keiki during the final moments of the rebellion in Wa that Keikei survived. (Source: wikia)
Ritsuko Nakajima is the mother of Youko Nakajima. Ritsuko is a well-meaning mother who, despite her stern manner, cares greatly about her daughter. Despite her own personal preferences, such as which schools she wants Youko to attend, she usually goes along with her husband's decisions as a dutiful wife. Because she doesn't want Youko to stand out or be mistaken as a delinquent, Youko's mother worries about Youko's naturally reddish hair and often tells her to cut it or dye it black. When Youko is suddenly spirited away to the Twelve Kingdoms, her fate is unknown to the people back where she was born. Youko learns about how her parents have reacted to her disappearance through the visions brought on by the Suiguutou. Youko's mother expresses worry and fear for her daughter, hoping that Youko will return and refusing to accept the conclusions that either Youko ran away out of rebellion or that she was caught up in some incident and is likely dead. As a result, Ritsuko's relationship with her husband is openly strained and she resents how her husband does not seem to care that Youko has disappeared. However, her mother becomes increasingly resigned to the idea that Youko was not as she seemed as time goes on and more people suggest that children are often not as they appear. In the anime, Ritsuko eventually learns of Youko's fate from Yuka Sugimoto when she returns from the Twelve Kingdoms; though saddened that Youko will not come back, she is satisfied to know that Youko is doing well where she is. In the novels, it is unknown if her mother ever learns what became of Youko. (Source: wikia)
A Chinese-born assassin, raised by Gauron alongside her twin sister Xia Yu Fan. She and her elder sister, Xia Yu Fan, were ordered by Gauron to finish off Kaname Chidori in order to mentally break down Sousuke since Gauron knew that he was attached to her ever since Sousuke was assigned to be Kaname's bodyguard. Later in Japan, she was killed by Leonard's man-size Arm Slave bodyguard named Alastor by strangling her to death, her corpse being used by Gates to mock Xia Yu Fan. She wears a vest with red linings on it. Early on, Yu Lan raises her disgust with Gates, the earliest in Balic when Gates shoves the barrel of his CZ-75 pistol on her mouth when Yu Lan mocked his sympathy for a dead Amalgam commando when he shot him in the head without a second thought. In combat, she used dual machetes. Aside from this, she is an expert in using throwing knives and is fairly proficient in the use of small arms. She is sixteen years old. (Source: Wikipedia)
Pisces, born March 20, Blood type O<br><br>He has an obsession with folklore that is so big that he can see demons. He loves mythology and is disappointed that no demons come to haunt him. He is excitable and intense and has had many experiences of unusual phenomena since his childhood.
She is the red-haired girl that Sousuke saved in Khabarovsk, The Soviet Union, when he was on a mission (Full Metal Panic! Episode 1). It is later revealed that she is a whispered. She also returns Sousuke's favor for saving her by building helping to build an Arm-Slave, the Arbalest. It is also shown that she is an acquaintance of fellow whispered, Nami.