Adolphine

An archduke candidate from Drewanchel.

She is the older sister of Ortwin and a friend of Eglantine. After her graduation, she is expected to marry Prince Sigiswald.

Adolphine cultivates an image of a serious, trustworthy, and diligent person. In private, however, she is far more selfish and unreasonable. This is a side she only ever shows to her close family, like her brother Ortwin. She is very passionate about fashion and beauty to the point where she occasionally talks her brother's ear off about it.

(Source: Ascendance of a Bookworm Wiki)