“You’re the Princess,” you tell her matter-of-factly. “I may be well trained, but I can’t do anything compared to your magical power!”

Princess Luna’s expression falls a little bit before she clears her throat and puts on another vulnerable face for you. “Untrue! You’re so strong and brave that I’m certain you could make me safer. Please?” She places a hoof on your foreleg to accentuate her point.

If you wish to relent and accompany Princess Luna inside, proceed to Chapter 22.
If you wish to continue explaining how little value you would add to any dangerous situation (since she seems to just not get it), proceed to Chapter 47.