Balin is one of the playable in-game characters in LEGO Dimensions 2: The Rise of Enoch, from the Hobbit franchise.
He was the second dwarf to arrive at Bilbo's house at the beginning of The Hobbit. The one before him was his brother Dwalin and like him he played a fiddle.
Among the dwarves in The Hobbit, Balin was the second-eldest dwarf on the quest (behind Thorin), and loosely held the position of deputy leader. He led the dwarves in the escape from the spiders, and spoke for the party when the Elven king captured them.
He was described as "always their look-out man": He spotted Bilbo approaching The Green Dragon Inn at Bywater, and was also first to spot the trolls' fire, as well as the elves in Mirkwood. He noted that not even a mouse had ever passed him on watch. Conversely he did not notice Bilbo (hidden by wearing the One Ring) as lookout for the company after escaping the goblins in the Misty Mountains.
After this bit of trickery, Balin gained respect for Bilbo's abilities and was the only dwarf that volunteered to accompany Bilbo down the secret passage to Smaug's chamber. Of all the dwarves in the quest, Balin was the only one known to have visited Bilbo at Bag End after their experiences on the quest for the Lonely Mountains.
Balin left the Lonely Mountain and entered Moria with Oin, Ori and others intending to establish a colony and reestablish the ancient kingdom, but the Balrog known as Durin's Bane had not left the place. Their small group was overrun by Goblins and wiped out. Balin himself was killed by a Goblin archer, ambushed while pacing through a hall regarding his dead friends. The tragic fate of Balin's colony remained a complete mystery to all Middle Earth until the arrival of the Fellowship of the Ring.
In The Lord of the Rings, the Fellowship discovers his tomb. His tombstone read "Here lies Balin, Son of Fundin, Lord of Moria".