The Morrigan or Morrigu is a war goddess in Celtic paganism. She is associated with fate, death or warfare.

Sometimes she is a single Goddess, and other times she is referred to as 3 individual Goddesses. With Arianrhod and Blodeuwedd, the Morrigan is the Crone phase of the Welsh Triple Goddess. As she is part of a larger trio, and yet a trio within herself, the Morrigan is the ultimate Triple Goddess.

In a myth, she is washing clothes in a river before a battle, the warriors clothes she washed would die the next day.
She used magick in a battle. But the morrigan wasn't not a warrior or one who fought on the battlefield.
Her animal symbol is the crow or raven. In the Arthurian legend, she is Morgan le Fey.

When viewed as three separate Goddesses, the Morrigan is made up of Badb (Vulture or Fury), Macha (Crow or Battle) and Nemain (Frenzy or Venomous). "Morrigan" is translated to mean Phantom Queen or Queen of the Demons. The details of the three are often blurred and their qualities overlap. Some sources describe Macha as a separate Deity altogether, making the trio of the Morrigan to be Badb, Nemain and Fea .