The Morrígan

https://en.wikipedia.org/wiki/The_Morr%C3%ADgan

is often considered a Triple Goddess, but this triple nature is ambiguous and inconsistent. These triple appearances are partially due to the Celtic significance of Threeness.^[1] Sometimes she appears as one of three sisters, the daughters of Ernmas: Morrígan, Badb, and Macha.^[37]

Sometimes the trinity consists of Badb, Macha, and Anand, collectively known as the Morrígna. Occasionally, Nemain or Fea appear in the various combinations. However, the Morrígan can also appear alone,^[25] and her name is sometimes used interchangeably with Badb.^[34]

The Morrígan is mainly associated with war and fate, and is often interpreted as a "war goddess". W. M. Hennessy's The Ancient Irish Goddess of War, written in 1870, was influential in establishing this interpretation.^[38] She is said to derive pleasure from mustered hosts.^[39] Her role often involves premonitions of a particular warrior's violent death, suggesting a link with the banshee of later folklore.

This connection is further noted by Patricia Lysaght: "In certain areas of Ireland this supernatural being is, in addition to the name banshee, also called the Badb".

^[40] Her role was to not only be a symbol of imminent death but to also influence the outcome of the war. Most often, she did this by appearing as a crow flying overhead and would either inspire fear or courage in the hearts of the warriors. In some cases, she is written to have appeared in visions to those who are destined to die in battle as washing their bloody armor.

In this specific role, she is also given the role of foretelling imminent death with a particular emphasis on the individual.^[41] There are also a few rare accounts where she would join in the battle itself as a warrior and show her favoritism in a more direct manner.^[42]

NOTES
 W. M. Hennessy, "The Ancient Irish Goddess of War", Revue Celtique 1, 1870–72, pp. 32–37
Dindsenchas "Odras"
Patricia Lysaght, The Banshee: The Irish Death Messenger, 1986, ISBN 1-57098-138-8, p. 15
Rolleston, T. W. (1911). Celtic Myths and Legends. New York: Barnes and Noble. ISBN 978-0-7607-8335-1.
Arthur Cotterell, "The Encyclopedia of Mythology", 2010, pp. 102, pp. 152