He stands slightly behind her on the opposite side of the bow where he's not likely to be hit if she misses.

"I only know one person who's a decent archer, but I do think part of it is understanding the arc and how to aim. Not necessarily your shoulders."

Granted the archer he's speaking of is secretly a magical dragon or something, which is kind of cheating.

"You're aiming too low, the arrow will go in a parabola."