Female Chief Astronomer of the Eight Star Kingdom. She traveled the country with her father and witnessed more of the world than anyone, but this country was too small for her. Sleepground dreams of the day she will finally step into the unknown world. "The red comet means only one thing... treason."

Male Seongju (The Sovereign) The ruler of the Eight Star Kingdom. He seeks to maintain order through absolute power. He does his best to protect the Biseongpyeon, which has been passed down through generations of Sovereigns. "The only ones capable of treason are the Star Lords!"

Male Seonggun (Star Lord) The master of Cheonganseong who harbors a secret. Rumors of misconduct have followed him since his coronation, and he stands in opposition to Sovereign Suhyun. "Is the Biseongpyeon itself not something whose very existence is unclear?"

Male Taoist The leader of the Taoists who protect the Sovereign. He protects Sovereign Suhyun by freely wielding ancient artifacts and techniques known as Taoist arts. "It is not against etiquette for a Taoist to use Taoist arts."

Male Solar Immortal The spiritual pillar of the Eight Star Kingdom. He lives deep within the palace and rarely reveals himself, so few know of his existence. He passes on the wisdom he has gained throughout his life to the Sovereign. "The Sovereign must execute that person without delay."

Male Stranger A stranger who descended from the sky. After his identity is discovered by Sleepground, Gongryong tells her he has a mission he must fulfill. In this unfamiliar place, he comes face to face with a familiar face. "I have only come here to carry out my mission!"

Female Lunar Priestess The representative of Heugak. She assists Heugak and conveys his words to the Sovereign. "A red comet has been observed in the northwestern sky."

Male Doll Taoist A Taoist belonging to the palace. He creates automated dolls to assist Radder. "I will surely repay you by offering the constellation of Jigonseong."