You are welcome to the city of Tarnag. Through Ûndin's and Gannel's otho, I, Thorv son of Brokk, invite you a peaceful protection in our hall.— Thorv
Thorv was the main guard to Ûndin. Thorv was, according to Ûndin, his best man: Thorv was the lead guardian and traveler with Orik, Arya, Eragon and Saphira.
Thorv also took Eragon's horse, Snowfire back to Tarnag and Tronjheim.