The Darkening Wild
Loremaster of Erebor and advisor to King Dain
Dwalin was only two years old when Smaug came to the Lonely Mountain and drove his people out. He barely survived, but until their return with Thorin, he had no living memory of what the mountain was like. He is much younger than his brother Balin, who was already an adult when the dragon came.
Like his brother he has a sharp mind, but he has always been the quieter of the two. Since becoming a lord of Erebor, Dwalin has spent some of his vast wealth on books and scrolls of lore. He has learned the speech of the ravens of the Mountain, and serves as King Dain’s main adviser.
Dwalin does not always get along with his brother, who has a thirst for adventure that far exceeds Dwalin’s own.