Higashihongan Sanae

Japanese name:

東本願 早苗

She's the ghost living in Koutarou's apartment.
SpoilerIt's later revealed that Sanae isn't her real name and that her ghost body isn't her real body. In fact, she is currently in hospital in a coma, and has actually long, twintailed brown hair.

Voiced by: Eri Suzuki

MAL