Hermod (Old Norse: Hermóðr) is the swift, courageous messenger of the Norse gods, son of Odin and Frigg, known for his bravery, speed, and role as a divine herald, especially famous for his epic, nine-day ride on Odin's horse, Sleipnir, to Hel to ransom his beloved brother Baldr from the underworld. He's often depicted with armor and a staff, acts as a guide for slain warriors to Valhalla, and is seen as a god of communication, travel, and luck, akin to the Greek Hermes.

Key Characteristics:
Son of Odin & Frigg: He is royalty among the Aesir gods, brother to Baldr.
Messenger of the Gods: His primary role involves swift travel between realms, delivering important messages.
Brave & Bold: Despite his messenger role, he's known as "Hermod the Bold" for his daring feats, especially his journey to Hel.
Equipped for Travel: Wears Odin's helmet and mail, carries the magic staff Gambantein, and rides Sleipnir.
Guide to Valhalla: Welcomes fallen warriors (Einherjar) to Odin's hall.

Most Famous Deed (The Ransom of Baldr):
After Baldr's death, the gods were desperate to retrieve him from Hel.
Hermod volunteered for the perilous journey, riding Sleipnir for nine days and nights to the underworld.
He met the guardian of the underworld and successfully pleaded with Hel for Baldr's return.
Hel agreed, but only if everything in the world wept for Baldr; a giantess's refusal meant Baldr remained in the realm of the dead.

Associations:
Speed & Communication: Like Hermes, he embodies swiftness and the flow of information.
War & Luck: His name means "spirit of war," connecting him to battle and fortune.