Which character? Wylan!
What do they want? Most of the components from this outfit, except the sweater is Minnow blue. If possible, a leather pack, but that is like a super huge ask.
Can they supply materials? I think fabrics is open so yes!
What are they trading? His company! No, Wylan will go out to the woods to pick herbs for tinctures and the like, depending on what Jesper wants in return (sleeping, alertness, etc etc)