She had been chosen to be the next healer. She had been prepared to take up the position whenever she was needed; whenever it was that her predecessor was to die.
She had prepared for the time as it nears...
Or, at least that was the plan in the rough draft.
After much of her preliminaries regarding the duties and knowledge that come with the position she was to take, she hadn't had much to do while awaiting her succession as the next healer. Therefore, she joined a hunting party and became quite enamored with the life as a hunter instead.
Slowly falling out of love and into dread about having to one day give this life up to be a healer, she eventually managed to tell the King and the healer about her wish to resign.
Now, she lives a comfortable -- well, comfortable enough, -- life as a chaser.