Brokkr

Brokkr appears in the Skáldskaparmál account of a smithing contest prompted by Loki's boasting. Alongside his brother Eitri (also called Sindri in some sources), Brokkr undertook to forge magical treasures for the gods; Brokkr's role was to work the bellows while Eitri/Sindri performed the enchanted forging. The pair's work was set against that of the Sons of Ivaldi and culminated in a wager with Loki over the quality of the artifacts produced.

Extant summaries provide no detailed physical description beyond Brokkr's classification as a dwarf. Sources identify him functionally as a smith's assistant who operates the forge bellows; no specific height, color, clothing, or facial features are recorded in the provided material.

Brokkr's principal skill is endurance and precision at the forge bellows, maintaining the fire at the required temperature to enable his brother's magical smithing. In the Skáldskaparmál episode he persists despite repeated attacks by Loki in the shape of a gadfly; only a bite to his eye caused him briefly to stop blowing, producing the flaw that shortened Mjölnir's handle. He also enforces the outcome of the wager in the narrative: after winning the bet and finding Loki could not lawfully forfeit his head, Brokkr sewed Loki's lips shut so Loki could not boast until the thread came out.