This is me rambling as an archer:
At first glance, I thought the archer looked nice, then I was looking at the pose. Is she supposed to shoot to the right?
With how she is facing, and the other guy, the answer is probably yes.
Then I would say, show her from the front, as the archer is right-handed. (holds the bow with left, pulls the string with right)
How she is currently positioned, she would shoot to the left. When shooting, the arm holding the bow is at a straight angle with the shoulders. This means that the bow would go to the left.
If you want to keep the archer shown from the back and shooting to the right, consider making her lefthanded.
Reference pictures coming later.