What is the role of a prophetess specifically? How does you claim this calling upon your life?
The role of the prophetess, like the role of the prophet in the Bible, was to be God’s mouthpiece. Sometimes this involved simply proclaiming a revelation you had received from God (see 1 Corinthians 11 and 14). Sometimes it involved offering up an exhortation to God’s people or making a wise judgment, based on some revelation from God. See Judges 4-5 about Deborah.
In regard to claiming such a calling in your life, you must first have been called by God to do this and accordingly granted the gift of prophecy, as recognized and attested in the faith community. It’s not a matter of simply going out and claiming to be a prophetess. There must be fruit and evidence in your life that you has been gifted in this way.
—Ben Witherington III