"It seemed that Dernhelm laughed, and the clear voice was like the ring of steel. "But no living man am I! You are looking upon a woman. Eowyn am I, Eomund's daughter. You stand between me and my lord and kin. Begone, if you be not deathless! For living or dark undead, I will smite you, if you touch him."
The winged creature screamed at her, but then the Ringwraith was silent, as if in sudden doubt. Very amazement for a moment conquered Merry's fear. He opened his eyes and the blackness was lifted from them. There some paces from him sat the great beast, and all seemed dark about it, and above it loomed the Nazgul Lord like a shadow of despair. A little to the left facing them stood whom he had called Dernhelm. But the helm of her secrecy had fallen from her, and and her bright hair, released from its bonds, gleamed with pale gold upon her shoulders. Her eyes grey as the sea were hard and fell, and yet tears gleamed in them. A sword was in her hand, and she raised her shield against the horror of her enemy's eyes.”
J.R.R. Tolkien, The Return of the King