The Ebony Factor

Ianthe Potter is born with Tom Riddle's soulmate mark, neatly voiding the prophecy and triggering a third feather from Fawkes. The real catch? Voldemort attacks her based on new gendered rumors, not knowing any of these things. Deciding there's too much to explain, Dumbledore opts for a conversation with the Dursleys and not a letter - and further changes everything. Fem Harry.