Váli is the god of revenge. He is the son of Odin and Grid. Loki and Sigyn also have got a son named Váli.
Váli was born for the purpose of avenging the death of Balder, who was slain in a freak accident by the blind god Höðr. Within moments of being born Váli grew to the size of a full-grown god, ready to fulfill his purpose.