A consort of the Shu family and a Noble Consort, a rank second only to the Empress. She selected Keigetsu as the Shu family's Maiden candidate. She appears refined, gentle, and compassionate. While she acts as a serene and kind consort in public, she secretly orchestrates events from the shadows and weaves plots to achieve her own goals. She is a key figure deeply involved in the conspiracies surrounding the inner palace and the imperial succession.

The Chief Guard who maintains discipline within the inner palace. He has blue eyes inherited from his mother, who was a foreign slave. He is the younger half-brother of Gyomei. He possesses a taciturn and cold demeanor.

Kou Reirin. The Maiden candidate of the Kou family and the Empress's niece. She is so beautiful she is hailed as 'His Highness's Butterfly' and is loved by everyone. Although she has been sickly since childhood and appears fragile, she actually possesses an indomitable spirit, grit, and nerves of steel that never yield to any hardship.

Shu Keigetsu. The Maiden candidate of the Shu family. Riddled with a strong inferiority complex, she is hated by all and called a villainess due to her despicable behavior. Envying Reirin, who is her polar opposite and beloved by those around her, she uses her mastery of forbidden arts to swap bodies with her on the night of the Tanabata Festival.

Ai Hoshun. The Maiden candidate of the Ai family. Among the candidates from other families, she is quiet and reserved, carrying a petite and adorable aura. She excels at poetry and calligraphy.

Gen Kafuki. The Maiden candidate of the Gen family. She has a taciturn and dignified presence. As the eldest among the Maiden candidates, she has a composed personality. She is skilled in board games like Go and Shogi, as well as martial arts.

Kin Seika. The Maiden candidate of the Kin family. She deeply loves and respects beauty and art. With clear values and distinct likes and dislikes, she possesses a proud and upright character.

The Crown Prince of the Eikoku Empire. Ei Gyomei. He is gifted in both literary and military arts, handsome, sincere, and possesses a strong sense of responsibility. He was born imbued with 'Dragon Qi.' He is Reirin's cousin and loves the brilliant Reirin from the bottom of his heart.

A lady-in-waiting serving Keigetsu. She has red hair inherited from her mother, who was a foreign dancer. She had harbored deep resentment toward Keigetsu due to repeated harassment, but after the body swap, she is gradually won over by Reirin's kindness.

Kou Fuyu. The head lady-in-waiting to the Kou family's Maiden candidate. Having Gen family blood, she is calm and collected on the surface while hiding a passionate drive within. She swears absolute loyalty to Reirin.