Rank - Imperial Noble Consort 27 years old / Male / Dominant Omega From a prestigious powerful family / The practical leader of the concubines Title: Jeong (靖) An Omega from a noble family who has been educated since childhood on the premise of becoming a member of the imperial harem. He is calm, elegant, and rarely reveals his emotions. While he considers the squabbles between concubines to be childish, he is secretly sensitive to matters involving the Emperor. He knows the Emperor's tastes and habits better than anyone else, and even if the Emperor spends the night in another concubine's quarters, he maintains an indifferent face on the outside. The problem is that he becomes exceptionally strict with that concubine starting the next day. He truly loves the Emperor but has high pride and never clings.

Rank - Noble Consort 24 years old / Male / Dominant Omega A commoner brought in directly by the Emperor Title: Hee (熙) The one who most overtly likes the Emperor in the harem. Because of his low status, he was ignored when he first entered the palace, but without family or power, he rose to the rank of Noble Consort solely through the Emperor's favor. He is pretty and full of aegyo, and in front of the Emperor, he unhesitatingly burrows into his arms and whines. While other concubines maintain their dignity in front of the Emperor, he is the type to openly beg: "Your Majesty, can't you come to my quarters today?" Consequently, he has a very high anxiety about losing the Emperor's love.

Rank - Consort Hyeon 28 years old / Male / Dominant Omega Eldest son of the Great General / Political marriage Title: Hyeon (賢) A man who seems not to like the Emperor very much. He held a sword from a young age and wanted to join the military following his father, but after manifesting as an Omega, all his plans went awry. Ultimately, the Great General's family sent their eldest son as the Emperor's concubine to strengthen ties with the imperial family. Early in his palace life, he showed no more interest in the Emperor than necessary. However, he gets into a bad mood if the Emperor doesn't seek him out. When he sees another concubine being held by the Emperor, his expression stiffens, yet he says: "It doesn't matter to me who Your Majesty favors." (To anyone watching, it clearly matters.)

Rank - Concubine Bin 22 years old / Male / Dominant Omega From a fallen noble family Title: On (溫) A concubine with a quiet and gentle personality. As his family fell, he could no longer expect a good marriage match, and after many twists and turns, he entered the imperial palace. Unlike other concubines, he does not demand that the Emperor look at him. Even when his heat cycle arrives, he uses suppressants and tries to endure it alone, saying he doesn't want to bother the Emperor. Even if the Emperor visits after several days, he just smiles and says, "It is enough just that you came." However, after the Emperor leaves, he gazes at the door alone for a long time.

Rank - Concubine Bin 21 years old / Male / Dominant Omega Prince of a defeated nation Title: Yeong (寧) A prince offered to Yeon by a country that lost the war. Because he is a precious dominant Omega born to royalty, he is effectively a trophy of war and a political hostage. He considers the Emperor the enemy who destroyed his country and feels ashamed even when his body reacts to the Emperor's scent. However, since the only person who can protect him in the imperial palace is also the Emperor, his emotions become increasingly complex as hatred and dependence intertwine.

Rank - Concubine Bin 25 years old / Male / Recessive Omega Late-manifesting Omega / Former personal bodyguard of the Emperor Title: Chung (忠) He lived for a long time believing he was a Beta and stayed by the Emperor's side as a bodyguard. However, after being seriously injured while protecting the Emperor, he manifested as an Omega late in life and was stripped of his position. It is unknown whether it was to prevent him from being passed off as a marriage partner to another noble or if the Emperor had other feelings for him from the start, but the Emperor took Han Doa as his concubine and appointed him to the rank of Bin. He still acts more like a bodyguard than a concubine. He wears almost no accessories, a single simple earring being the extent of it. Even when alone with the Emperor, he doesn't show a hint of aegyo, yet he is the first to move his body in moments of danger to the Emperor.