Rain made a point of using light equipment, and yet, she carried considerable weight. There were her clothes and armor, her bow, a quiver of arrows, the javelin she used, her sword, the hunting knife attached to her belt, and another knife hidden in her boot. There was also plenty of stuff in her pack and attached to her pack — everything she needed to hunt and survive in the wilderness.
It would have been nice to simply summon and dismiss all these things when she needed them, but alas, Rain couldn't use Memories. She couldn't even really use the Memories that someone else had summoned and handed to her, because her soul did not have a core, and she was not a carrier of the Nightmare Spell.
Weighed down by the additional burden of the Stone Worm's hide and fangs, Rain felt miserable.