Think about the story. Why does the main character first eat the soul orb dust?

To build up the strength to return to the settlement
To save the dust so that it can later be used to pay the Crone
To avoid losing the memories and feelings that the dust contains
To ease the fear of remaining separated and becoming a Shell

The main character eats the soul orb dust to build up the strength to return to the settlement. The dust contains powerful energy and consuming it is believed to provide a boost in physical and magical abilities. By ingesting the dust, the main character is able to gather enough strength to make the journey back to the settlement, despite the dangers and challenges they may face along the way.