Wyress Gwen said a hunter named Gloria Fausta came looking for the Vestige while inside the tree. She is ashamed that she turned her away, but maybe they can aid her now. Head to Aldcroft and talk to Chamberlain Weller, he might know more.
When arriving in Aldcroft, look for the Chamberlain. He'll say they've got an emergency at the moment and can't help. Ask him about Gloria Fausta, and he says he doesn't know anyone who goes by that name. The Duke has been kidnapped, maybe she was too by those Bloodthorn bastards. Completing the quest will reward the Vestige a small sum of .