According to the local news channelAblade TV Online, the 12-year-old is part of the priests assumption of authority.
The girl is expected to undergo a second customary ceremony of purification for her new role.
The ceremony will involve preparations for her future marital responsibilities, including childbearing.
Child marriage is considered a violation ofhuman rightsand a harmful traditional practice affecting more girls than boys.
The practice has profound consequences on girls health and development, limiting their future economic and individual empowerment.
The Ghanaian government hasnt yet responded to news of the marriage.