Karnatia Seri Anabald

カルナティア・セリ・アナバルド, Katia, 大島叶多 (Ooshima Kanata)
The daughter of Duke Anabald. In her previous life she was a boy named Ooshima Kanata but she reincarnated as a beautiful girl. Shes a prodigy on par with Shunhttps://anilist.co/character/130487/SchlainZaganAnaleit and has been his best friend since their former life. Her speech is normally elegant and refined but when talking with others who have reincarnated she talks like a boy.