Manyuu, Kagefusa

魔乳影房

Chifusa's sadistic older sister. Kagefusa wears a black unitard featuring thin, feather-like protrusions on her shoulders and arms. She has white arm guards, black gloves, and a white cloth wrapped around her waist. She wears the same style of thigh-highs as Chifusa. In later episodes, her outfit becomes more modest, with a thin piece of black cloth covering an area that was previously open.
Along with her sister, Kagefusa's body is rather over-developed for her age. She has wide birthing hips, thick thighs, prominent glutes, and huge mammaries, giving her the silhouette of a fertility goddess. Kagefusa's well-endowed body commands authority and does not seem to slow her movements or cause her back pain.
Unlike Chifusa, she is perfectly happy with her family's form of government and goes to great lengths to preserve it. She hates her sister because, even though Chifusa has a smaller chest, she was chosen as the Manyuu successor over Kagefusa. At the beginning of both the anime and the manga, Chifusa steals Kagefusa's breasts when she unwittingly uses the Breast Flow technique for the first time. After this incident, Kagefusa is forced to wear an inflating bra and swears personal vengeance against her sister. She eventually abandons this grudge after Chifusa promises to return her breasts when she masters the Breast Flow technique. After forgiving Chifusa, Kagefusa's attitude towards life and the Manyu completely changes, turning her into an easygoing and relaxed (albeit still sadistic) person.
Trivia:
Her mother is Juchini. Kagefusa's older brother is Muneyuki Manyuu.
Prior to her defeat at the hands of Chifusa Manyuu, Kagefusa's breasts were arguably the largest in the series.
True Form Kagefusa's breasts were extraordinarily large and sensitive compared to other women, and just like her sister Chifusa, she was capable of climaxing from breast contact alone.
As evidenced by Special 3, it seems that Kagefusa's breasts were once capable of producing and storing enormous amounts of milk, and could even lactate upon reaching sexual climax. Kagefusa's engorged mammary glands were shown to not only leak milk, but to shoot full-on fountains of it as well (with no visible signs of running out). Kagefusa comments on the quality of her breast milk by stating, "It contains nutrients that promote breast growth!"
It is most likely Kagefusa lost her ability to produce breast milk following her defeat against Chifusa. However, based on the content of Special 2, it seems as though Chifusa herself may have gained the ability to lactate through her absorption of Kagefusa's tits via the Chichi-Nagare.
Kagefusa is known to be very sexually sadistic and possesses an unmatched sexual appetite. She has molested Oume, Kaede, Ouka, her sister Chifusa, and likely many more unknown women.