In Norse mythology, the Vanir gods are associated with nature, fertility, and prosperity. This group contrasts with the Aesir gods, who represent order and civilization. Notable Vanir figures include Njord, the god of the sea, and his children, Freyr and Freya, who embody love and fertility. The Vanir established a peace treaty with the Aesir after a conflict, symbolizing the balance between different aspects of existence.