Ravinia
<Crow Coin Exchange>
Ravinia is the NPC that allows you to spend Crow Coins obtained from level 5 Bartering. Her Crow Coin Shop is located on Crow’s Nest, an island in Ross Sea.
Ravinia has a line of Sailing quests that will give you half of many of the materials for upgrading Epheria Sailboat/Frigate to Caravel/Galleass.

where can i see that npc