Ruby is a NPC of the Val race. You will meet her at your Farm when you try to cross the bridge for the first time. She is the blacksmith of the town and owns a shop, selling helmets and such.
After the first dialog you will recieve quests from Ruby in your letterbox. A bird sitting on the letterbox indicates that a new quest is available.
First Quest: collect four timber.
Second Quest: use Mine I to collect enough stone to build a furnace.