Risai is the general of Tai's Jou Province and well-known, though she is not as renowned as Gyousou. When Taiki's return to the Twelve Kingdoms is announced, she is among the many who ascend Mount Hou in hopes of being chosen as the new king. She is a sennin as a result of becoming a general of Jou since the governor of Jou, who has a lived a long life, requires those who serve him to also possess longevity as well to retain their usefulness. Taiki develops a friendly relationship with her, but in the end does not recognize her as Tai's new king. After Gyousou ascends the throne of Tai, she remains a loyal subject. When Taiki and Gyousou both mysteriously vanish during another civil war, she and military commanders and civil servants oppose the governor who places himself in charge of the kingdom. While many are arrested, Risai is among the few who successfully escape arrest and continues to search for Gyousou and Taiki. She eventually flees to Han and then finds refuge in Kei, where she beseeches Youko to somehow find either Taiki or Gyousou in order save Tai from a corrupt and totalitarian rule by a usurper whose rule violates the Mandate of Heaven.
Chuchin is a student at the Daigaku in the Kingdom of En along with Rakushun and Meiken. He was given the name "Chuchin" (spider pillow); an anecdote claims that his overzealous studying resulted in spider webs forming on his pillow, thus the origin of his nickname. His formal personal name is Shintatsu. Chuchin has been studying at the Daigaku in En for over eight years, but eventually gives up the dream of becoming a government offical because of how many times he failed the exam for a certificate and gives all his books to Rakushun. He has a wife and child, which likely contributed to his decision to finally quit studying in order to support them. (Source: wikia)
Suzu's life seemed to begin with hardship. Her family had to send her away for money, she was caught in a shoku on her way to her new residence, and then found floating in the ocean of the Twelve Kingdoms. When she awoke and couldn't understand the language, she knew she wasn't home. A Shusei troupe was given custody of her and she traveled with them, still unable to communicate and doubly unable to perform. Her tasks were medial: washing clothes, animals, cleaning. One day she was pushed the stage to buy time while the troupe tried to prepare a show for Riyou, a Sen-nin in the kingdom of Sai. The only song Suzu was able to perform was one her father used to sing. But as soon as she started, Riyou interrupted her and started to leave. Because Suzu was able to understand her, she begged to be taken in as her servant. Riyou accepted and renamed her Honma, which means 'pathetic woman.' As soon as she was registered as a Sen-nin and this became clear to her, Suzu's life went downhill. She served Riyou for a hundred miserable years because she was afraid leaving would remove her from the contract of immortals. When Taiki returned to Mt. Hou, Suzu went to speak with him about Japan. Unfortunately, Sanshi attacked her and she was exiled from Mt. Hou. This embarrassed Riyou and made Suzu's life even harder. But she didn't stop her attempts for freedom there. When she heard the new queen of Kei was a taika, she wanted to meet Youko so badly she even had scary dreams about her. After breaking a valuable vase and being told her only way to make up for it was to gather a rare herb from the mountains, Suzu escaped to the royal palace and was taken in by the queen. The queen thought Suzu was much too spoiled and needed to mature, so she gave her a travelling pass, money and sent her on her way. Suzu headed for Kei. Along the way she met Asano, who was with the same Shusei troupe that Youko had traveled with, the leader of which Suzu had known as a child. Suzu asked Asano to come with her to meet Youko and, after some crazy visions by Asano, he joined her. Onboard the boat, Suzu met a sickly waif named Seishuu. She constantly told him that he couldn't understand the suffering of kaikyaku but he said he could because his life had been nothing but misfortune. Suzu cared for him and wanted to take him to Youko's palace so that he could be healed. Unfortunately, he was killed, but not before he helped Suzu to realize that other people in the world suffer just as much as she did. Angered by his death and hating herself for it, Suzu joined Koshou and Sekki's rebellion. Before that, she purchased a touki weapon and managed to gain access to the royal palace, thanks to her travelling pass. But Youko wasn't there, so she left and went to Shoukou's manner. After killing Shoukou, she was going to kill Youko. (Irony: she'd met Youko at this point but didn't know it.) But Shoukei convinced her that it would be wrong of her and that Youko would never have ordered the boy to be killed. Renewed and in love with Youko once again, Suzu fought in the rebellion and was invited to the royal palace with Shoukei after its end. [From Phenomenal: A Twelve Kongdoms Fansite.]
Yuka is one of Youko’s classmates in Japan and gets transported to Kou along with Youko and Asano. She enjoys fantasy books and is thrilled to be part of the adventure, believing that she is destined for greatness. Destined to be a rival, she becomes extremely jealous of Youko when she finds out that Youko is the "chosen one" and believes herself to be just as worthy. The king of Kou takes advantage of this to convince her to fight against Youko. She later realizes her mistake after making up with Youko, and Youko sends her back to Japan. In the novels she is only mentioned in passing and doesn't go to the Twelve Kingdoms but remains in Hourai (Japan). (Source: Wikipedia)
Shortly after fleeing from her captors after arriving in Kou, Youko Nakajima sneaks into Takki's house and attempts to rob her. Takki takes pity on Youko, explaining a number of general things about the Twelve Kingdoms to Youko. Seeing as Youko is stranded, Takki offers Youko in Kasai, where her mother works. Because of Takki's seeming kindness, Youko accepts. However, upon arriving in Kasai, Youko overhears that Takki's true intention is to sell Youko to Takki's mother, the mistress of a brothel, as a slave. Realizing that Takki is not to be trusted, Youko flees. In the anime, Takki's role is largely the same and she first appears in the third episode. Like in the novel, Youko attempts to rob Takki's house, although she is accompanied by her classmates Yuka Sugimoto and Ikuya Asano. Takki takes pity on all three of them, offering clothing, food, and shelter, and then offers the two girls a job in town, though once again, her intention is to sell the two girls as slaves. (Source: 12kingdoms.wikia)
Renrin is the Kirin of the kingdom of Ren. She is described as a cheerful young woman appearing about eighteen years of age. In contrast to her master, she is very proper and refined. In Renrin's first appearance in the series, she is requested by Lady Gyokuyo of the sages of Mount Hou to lend them the use of the royal treasure of Ren, a bracelet called the gogoukanda. Because gogoukanda can open a portal to Hourai without causing a shoku, it is instrumental in bringing Taiki back the Twelve Kingdoms. Because of her role in bringing Taiki back to the Twelve Kingdoms, Gyousou sends Taiki to Ren on a diplomatic visit to thank her. Both Renrin and her king, Seitaku take a liking to Taiki, though instability in their own kingdom leaves them very few opportunities to see Taiki or any of the other kingdoms. However, Renrin and Seitaku willingly offer Renrin's help and the use of the gogoukanda again to find Taiki when he disappears after a civil war breaks out in Tai. (Source: Juuni Kokuki Wikia)
Seishuu is a young boy with failing eyesight who winds up travelling with Suzu. He lost both of his parents to youma. Seishuu originally came from Kei, but when Jokaku ordered the exile of all the women in the kingdom, his family decided to leave. His father was unfortunately attacked and killed by a youma, devoured by a demon right before Seishuu's eyes, while Seishuu was injured from a concussion to the back of his head. The injury gradually grows worse and is the source of seizures and his failing eyesight. Seishuu and his mother eventually made their way to Sou and then Sai, but his mother passed away from illness before they can return to Kei. When the new ruler ascended the throne of Kei, Seishuu elects to return and encounters Suzu making her way to Kei by boat. He and Suzu initially do not get along, since he openly points out that Suzu, despite her difficult life, made no actual effort to try to change those circumstances and only moped about how unfortuate she was. However, they gradually grow on one another and become friends. During their voyage, it becomes apparent that Seishuu's health is failing and Suzu becomes convinced that they must go to Gyouten and meet with the monarch of Kei, who Suzu believes can heal Seishuu. However, they are seperated in Shisui Prefecture in Wa Province, where Seishuu is deliberately run over by the carriage of the prefecture's praetor, Shoukou, for collasping in the carriage's path. Seishuu dies in the arms of a girl named Youshi, who passes on Seishuu's dying words to Suzu that he was hoping that she would not cry because of him. (Source: The Twelve Kingdoms Wiki)