Reishō Miketsu

Reishō Miketsu (未決 霊召 Miketsu Reishō) is a Human who lives in Yasuraka Town. An ordinary Human, he possesses no spiritual talents whatsoever, but, under unfortuntate circumstances, came to have his soul possessed by the soul of a Tsukirei (憑き霊, Possessive Spirit) by the name of Yoshie Shiniyukumono (死にゆく者 淑恵 Shiniyukumono Yoshie), a girl with powerful spiritual abilities. Due to her own influence, she frequently takes control of his body, altering his gender and physical appearance to suit her own wants and needs, and can channel her powers through his body this way.

Trivia

 * Reishō's first name literally means "Ghost Summoner", referring to Yoshie, the ghost who possessed him. His surname "Miketsu" means "undecided", refer to his gender, which flips to male or female depending on who controls the body.