First person: I (polite, feminine). Second person: you. A kind-hearted and good-natured soul. Because of this, she finds life in the Ooku difficult. A newcomer maid. She resolves to work hard alongside Asa, but unlike Asa, she is clumsy and not particularly suited for domestic service. She possesses beautiful glossy black hair, lovely lips, and striking looks, but her personality is slow-paced and bumbling. Her eyes are a beautiful crimson. She harbors a longing for the role of Ochuro, the concubines who carry the Tensho's children.

A maid who arrived at the same time as Kame. Despite being a newcomer, she is excellent and a quick learner; she is raised as a successor under Utayama and rises rapidly in rank. Like Kame, she is a beautiful woman with orange hair. She has an intelligent personality and is polite and kind. She understands her position well. Does she harbor feelings for Kame...?

A woman who holds the position of Otoshiyori, the highest rank among the maids. She has taken a liking to Asa. Her face retains its beauty, but her age shows in her hands and elsewhere. She is strong-willed and stubborn, yet she favors those who are intelligent and like-minded. She carries herself with the dignity befitting an Otoshiyori; while she is an ideal superior, many fear her due to her strictness. However, having held the highest rank for many years, she is deeply respected by the maids.

The symbol of the Shogunate and the man holding the highest office. He possesses a beautiful appearance. Due to childhood trauma, he feels little meaning in his own existence. He keeps those he trusts close to him. First person: I (regal, weary). His speech is not a haughty, archaic style, but rather a quiet, somewhat hollow, and resigned manner of speaking with little intonation. Despite being an absolute existence, a sense of emptiness drifts about him because his position was gained solely through bloodline.

Utayama's direct subordinate. Her rank is Omotezukai, two levels above Mugitani and two levels below Utayama. She is one rank below Ochuro. She usually acts with Mugitani, but she is intensely irritated by the fact that the novice Asa has begun to distinguish herself, and she fears that she may eventually be dismissed.

Mugitani holds the rank of Otsugi, one level below Oyuhitsu, and follows Awashima. A senior maid tasked with training Asa and Kame. Jealous of their beauty, she takes out her frustration by bullying the clumsy Kame. She is plump and wears heavy blush on her cheeks like a cockatiel.

Hokuto Mizorogi. The head of the Mizorogi family, which has served as priests of Omizu-sama in the Ooku for generations. A male. He is a childhood friend of the Tensho. He is the only person permitted to enter the space inside the well. He has twin daughters, Futatsuki and Mitsuki. He shows a soft expression only to his daughters. It is unknown whether he has a wife. He has blond hair, blue eyes, and three dots arranged in a triangle on his forehead. It is never clear what he is thinking. He seems to know something about the Tensho and Omizu-sama.

A daughter of the Mizorogi family. During the morning ritual of drinking the sacred water, she and her twin sister distribute water while singing. She is identified by the red makeup in the shape of a crescent moon on her right eye. Mitsuki is fearful but has a shy, endearing personality. She is a gifted singer.

A daughter of the Mizorogi family. During the morning ritual of drinking the sacred water, she and her twin sister distribute water while singing. She is identified by the red makeup on her left eye. Futatsuki has a calm and friendly personality. She is a gifted singer.