Stiff Feather Trader NPC

This NPC is known Stiff Feather Trader NPC and Feather Currency Trader. Anyway as shown in the image to the right, she is located between doors 7 and 8 in the Free Market.

Alternatively you can reach her trade menu by using the Chat Command @forest or @fmnpc which will open up the All In One NPC. From his list select Stiff Feather Trader.