Ryuuki Shi is the reigning emperor of Saiunkoku. He is nineteen years old when the story begins. The youngest of six brothers, he was an unlikely candidate to ascend to the throne. Of his five elder brothers, four killed each other over the succession and one was exiled for treason. As a child, Ryuuki was badly mistreated by his mother and his brothers, except for his brother Seien, who seemed to be the only one who truly cared for him. His other brothers and mother used to beat Ryuuki and lock him in a closet for hours at a time, telling him his birth order was bad and that he stole affection from his siblings. These experiences led to a lingering fear of the dark and sleeping alone. Ryuuki often took refuge in the garden or the imperial archives, where he first encountered Shouka Kou. Shouka tutored the young prince and encouraged War General Taifu Sou to teach him swordsmanship. Due to his father's dying wish, Ryuuki ultimately rose to the throne. However, he avoided any involvement in politics or government, wandering the palace for hours so no one would be able to find him. He even spread rumors that he preferred the company of men to fuel speculation he could not produce an heir. Ryuuki secretly hoped that Seien, his beloved older brother, would eventually return and take his place as Emperor. Ryuuki's avoidance of responsibility came to an end when he met Shuurei, who told him of her dreams of making a better life for the nation's people. Ryuuki decided to take on his responsibilities and become a respectable Emperor. (Source: Wikipedia)
Shusui is the Chief lady-in-waiting in the imperial household. Ran Ryuuren noticed once while having tea with Shuurei that she is very skilled for a lady-in-waiting (Kourin had accidentally dropped the tea pot and Shusui had caught it). She is part of the Black Wolf clan.She secretly loves and admires Shouka Kou,the father of Shuurei Kou,librarian by day and the leader of the wolfs's clan ,Black Wolf himself. He retired from being the leader after he felt in love with Shuurei's mother,a noble woman who Shouka was supposed to kill,because of a mission he was given. (Source:HotaruKara)
Works in the persecution department. From the middle-high class, he proposes to Shuurei under his father's orders despite his lack of personal interest in her. When he first appears, he is bearing many tanuki-themed accessories including a golden statue, causing Seiran to nickname him "Tan-tan." He does not like putting effort into anything and thus is both intrigued and annoyed by Shuurei's continual determination to do her best. However, Tan-tan can clearly perceive a situation's complete context or a person's true character, making him a valuable asset to his department, and he tries to lessen Shuurei's naiveté by showing her the evils of the world. Seiran considers Tan-tan to be a practical influence on Shurei and is unusually willing to engage him in conversation. Nevertheless, Seiran also likes to pelt Suou with bamboo shoots and make him pay for random purchases, calling him "Saifu #2" (wallet #2, after Ensei as #1). Tan-tan is roped into the counterfeit paintings investigation by Shurei and ends up arresting his father, who was used in a larger plot. He saves Shurei from being fired when Riku Seiga steals her research proposal. Since then, Tan-tan has followed Shurei and re-entered the persecution department as her assistant.
She is a friend of Sawako's from back when they were in high school, and they were both in the light music club together as part of the band Death Devil. She and Sawako used to try to outdo each other on the guitar. Her stage name is Christina.
Chiaki is Fumika's coworker, though unlike Fumika, Chiaki has already died. Chiaki died due to a car accident and thus retains the appearance of how she looked before she died, which happens to be very similar to Fumika, though Chiaki does not age. Believed to have been eighteen when she died, she is "over twenty-one-years-old" as she says, however she looks roughly as old as Fumika is. She is assigned a different city in Japan than Fumika, and the two rarely ever meet on Earth, but do see each other more often when in Shigo. Chiaki has a bright personality and likes to express her emotions outwardly, whether they be related to frustration, or happiness. As observed by Fumika, Chiaki usually is not as diligent about her job as Fumika is, and if a delivery is too much of a pain, she will generally drop it, marking the letter with an invalid addressee.
Dias Ragu, or more commonly known as The Black Wing, is considered as one of the strongest fighters that Ashliana has ever seen. Dias has thirsted for strength since he was boy. He earned a reputation during the war as cold blooded killing machine. He didn't care who he fought or killed. He fought side by side with Vy Low and Kai Shinks, which explains why they are such close friends. When Dias turned 16, he was on his way to becoming the 58th Sevalle when his parents contracted a rare disease and died. Later on his younger sister Elle was also infected. After losing both his parents, he would not stand by and watch his sister die. He decided to put his ambitions aside and went to fight as a mercenary so he could earn enough money to buy medicine for Elle. Eventually, he got enough money and was able to save Elle's life but fate dealt him all the wrong cards. As a result of the extra battles he fought in, his body was greatly weakened so he decided to give up his dreams of becoming a Sevalle. Due to this, he gave way to Kain Phalanx who later became the 58th Sevalle, G. Elle, feeling guilty decided that she would take her brother's place and become Sevalle. A few years later, she earned the title as the 59th Sevalle, Shadow Skill. (Source: Wikipedia)
The 55th Sevaar, he is a master of Open Skill, and the twin brother of Jin Stolla, the leader of Septia troupe Phantom. He was once defeated in personal combat by Vy Low, which enabled Scarface to become the second High-Sevaar after Hawk Eyes, and was also the subject of an assassination attempt by G (Kain Phalanx), the rogue 57th Sevaar, who Scarface killed in defense of the king's honor. He is the mentor of Scrib Lohengrin and guardian of his grand-niece Kyuo Luo, whom he took under his wing after her grandfather was killed when the monster kwown as the Moon King massacred the rest of their group of demon-beast-hunters. (Source: Wikipedia)