Jinshi

Age:
18 (LN V1) (real), 23 (as eunuch Jinshi)
19 (LN V2) (real), 24 (as eunuch Jinshi)
18 (WN V2) (real), 24 (as eunuch Jinshi)

Height: 181 cm (5'11")
Hair color: Black (WN), Dark Purple (LN)
Eye color: Black (WN), Pink (LN)

Jinshi is the deuteragonist of Kusuriya no Hitorigoto. He appears to be beautiful eunuch who was placed in charge of the inner palace and often requests for Maomao to solve mysteries in the palace in exchange for rare medicines. He finds Maomao's apathy toward him refreshing and amusing. Later, his childish curiosity evolves into a one-sided romantic affection.

Jinshi is a beautiful eunuch who works in the palace. With a celestial-like face, not only are women fascinated by him, but men are as well.

His real name is Ka Zuigetsu (華瑞月, Hua Ruiyue)
(Source: The Apothecary Diaries Wiki, edited)