Nár was the lone companion of Thrór during his ill-fated attempt to reclaim Moria (before Balin's attempt). They journeyed from Dunland, crossed the Redhorn Pass, and came into Azanulbizar before finally approaching the East-gate of Moria. Nár, sensing danger, cautioned Thrór to beware, but Thrór did not listen to his counsel and walked proudly into Moria as its rightful heir.
Nár stayed outside and hid nearby for three days. Then Azog, the orc chief of Moria, had the decapitated body of Thrór flung out onto steps of the East-gate, to which Nár was filled with horror. Azog then used Nár as a messenger, demanding that he return to his people and warn them that beggars, who dared enter Moria and attempt thieving, would fare the same. Azog declared that he had killed Thrór and that he now ruled Moria as king. Nár was prevented from retrieving the severed head of Thrór, on which Azog had carved his own name. As a final insulting gesture, he was struck with a small pouch of coins that were of little value. As Nár fled down the Silverlode, he looked back and saw that Orcs had appeared out of the gate were hacking apart the body of Thrór and flinging the pieces to the black crows.
Portrayal in adaptations
In The Lord of the Rings Online, Nár, thought aged, is shown to be still alive in TA 3019. He lives with a single caretaker in Zudrugund—a small Dwarf settlement in the Misty Mountains south of Moria, where Thorin and exiles from the Lonely Mountain briefly settled on their way to the Blue Mountains.