At fifty-two years of age Oswald is still young by the standards of Firbolgs. In his five decades on Faerun he has scarcely left the High Forest. By the standards of civilised men he is uncouth and uneducated, but within the High Forest he is a peerless tracker and respected guardian.

Standing head and shoulders above most men, Oswald's arms are as thick around as the limbs of trees and his grip is as strong as the roots of an oak. Despite his great size however he can move with surprising grace and quiet step when the situation demands it. Like most Firbolgs in the High Forest his skin tone is grayblue and he wears his chestnut coloured hair and short beard shaggy and untamed. Oswald's copper eyes are kindly and forever inquisitive.