I'm willing to fudge her age to make it a little more suitable for the pairing or we could start it off a little more romance/blossoming feelings and then time skip until after she leaves? I mean she was, what, about 17 when she left the Jedi temple at the end of Clone Wars? Ashoka was born on 36 BBY and left at 19 BBY? So yeah, we could push it up a year. Up to you, though!