Vali (or Váli) is a Norse god, son of Odin and the giantess Rindr, born solely to avenge his half-brother Baldr's death; he's described as a fierce, single-minded warrior, growing to adulthood in one day, becoming a great archer, and famously refusing to wash or comb his hair until he'd killed Höðr (Baldr's killer) and dealt with Loki, surviving Ragnarök to help renew the world.

Key Characteristics & Role
The Avenger: His entire existence is dedicated to avenging Baldr, the beloved god of light, murdered by Loki's trickery.
Rapid Growth: He achieves manhood within a single day of his birth, demonstrating immense power.
Skilled Warrior: Known as "bold in battle" and an "excellent marksman" or "good shot," with symbols including raven-feathered cloaks and horses.
Abstinence Vow: He famously remained unwashed and uncombed until his vengeance was complete, a ritualistic act common in Germanic lore.
Post-Ragnarök: Vali is one of the few gods destined to survive Ragnarök, participating in the world's renewal.

Key Mythological Acts: Killed Höðr (the blind god tricked into killing Baldr) to fulfill his purpose. Bound Loki with the entrails of his son, Narfi (or Nari), after the vengeance.

Depiction: While specific physical descriptions are sparse, he embodies vengeance, swift action, and divine duty, often linked with warriors and oaths.