What are flyff classes

You start off as a vagrant, at level 15 you can choose to become an acrobat, assist, magician, or mercenary. Depending on which of these 4 classes you choose you will have 2 final choices at level 60.

An acrobat can choose between becoming a ranger or a jester.
An assist can choose between becoming a ringmaster or billposter.
A magician can choose between becoming an elementor or a psykeeper.
And a mercenary can choose between becoming a blade or a knight.