Danieru is the Blacksmith and will spawn in upon the completion of the building. You can buy various metals and items from him as well as upgrade your tools with his services.
He will give you a free Hammer the first time you talk to him.
Danieru likes the following gifts
- Ender Pearl (favorite)
You can marry Danieru. Once you get the heart to red with gifts, use a Blue Feather.
He gives the butter recipe when you become his friend.
At friendship level 3, you will be able to purchase a sprinkler from Daneiru.