How many Black Knights (Black Wings Generals) are there really?

Actually, in the meeting hall (The place where all the classes and instructors get together) Aran appears as female. However, in the past leafre area there is a quest where you have to do something for Maha and during that quest Aran is male.
God damnit Nexon!

Maybe after 500 years or w.e Aran's hair grew up so long that he looks female?

They never said sleeping and amensia was all the black mage`s curse did...

I bet Aran was a pimp back at their age and slept with the Black Mage's daughter (Orca maybe?) so the black Mage punished him for his insolence