Prinesca Yugiri

Prinesca is Perserte's 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 father's spirit saved Prinesca by offering to fuse herself with Prine, but with the consequence of ending her own life.

(Source: Wikipedia)