Morrigan
Morrigan, (sometimes referred to as “The Morrigan,” as more of a title than a name) known as the “phantom queen,” is a figure in Irish Mythology featured primarily in the Ulster Cycle, a collection of Celtic Heroic tales, including the story of Cuchulain. She was a goddess of death on the battlefield, and fought on the side of the Tuatha De Danann (the old gods, seen as the “good guys” in Celtic myth) during their wars with invading gods and monsters like the Fomorii.
She was closely associated with the other war deities Macha, Badb, and Nemain. The title of “The Morrigan” may refer to the trinity of these goddesses, sisters, as a whole, “the Morrigan” taking the form of one of them each time she appeared.
Her favourite form was the crow, and as such she settled in triumph on the shoulder of Cuchulainn when he was finally killed in the war against Queen Medb. In battle she would fly above the field as a raven or crow, shrieking and lapping her wings to scare the enemy host, and to signify death for her foes. In battle she was fearsome and quick, while still beautiful to look upon. She is closely comparable as a war deity with the Germanic Valkyries.