Prinesca Yugiri

ユギリ・プリネシカ, Prine
Prinesca is Persertes younger twin sister. She also works at Tsuge Divine Music Player Office. Everyone in the office usually addresses her as Prine except Phoron. She is actually half human half spirit because when she was a child she almost died from a terrible illness. Her fathers spirit saved Prinesca by offering to fuse herself with Prine but with the consequence of ending her own life. from wikipedia