Bilbo Baggins Edit
Main article Bilbo and ThorinThorin had a complicated later strong relationship to his non-dwarf companion, Bilbo Baggins.
Thorin and Dwalin have been best friends since the day they were born and have grown up as close as brothers. They practically were raised together and nearly inseparable. Dwalin had followed Thorin for most of his life, from the time Erebor fell to the battle on Ravenhill.
As young men they fought in the Battle of Moria and Dwalin followed Thorin as their king, showing a very strong bond between the two best friends.
Fili and Kili Edit
Thorin practically helped his sister Dis raise Fili and Kili and saw them as his own sons. In turn, the boy saw Thorin as a strong father figure for the two of them.