Then Merry heard of all sounds in that hour the strangest. It seemed that Dernhelm laughed, and the clear voice was like the ring of steel. ‘But no living man am I! You look upon a woman. Éowyn I am, Éomund’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 the Ringwraith made no answer, and 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. A little to the left facing them stood she whom he had called Dernhelm. But the helm of her secrecy had fallen from her, 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 were on her cheek. A sword was in her hand, and she raised her shield against the horror of her enemy’s eyes.

Éowyn it was, and Dernhelm also. For into Merry’s mind flashed the memory of the face that he saw in the riding from Dunharrow: the face that goes seeking death, having no hope. Pity filled his heart and great wonder, and suddenly the slow-kindled courage of his race awoke. He clenched his hand. She should not die, so fair, so desperate! At least she should not die alone, unaided. […]

Suddenly the great beast beat its hideous wings, and the wind of them was foul. Again it leaped into the air, and then swiftly fell down upon Éowyn, shrieking, striking with beak and claw.

Still she did not blench: a maiden of the Rohirrim, child of kings, slender but as a steel-blade, fair yet terrible. A swift stroke she dealt, skilled and deadly. The outstretched neck she clove asunder, and the hewn head fell like a stone. Backward she sprang as the huge shaped crashed to ruin, vast wings outspread, crumpled on the earth; and with its fall the shadow passed away. A light fell about her, and her hair shone in the sunrise.

Out of the wreck rose the Black Rider, tall and threatening, towering above her. With a cry of hatred that stung the very ears like venom he let fall his mace. Her shield was shivered in many pieces, and her arm was broken; she stumbled to her knees. He bent over her like a cloud, and his eyes glittered; he raised his mace to kill.

But suddenly he too stumbled forward with a cry of bitter pain, and his stroke went wide, driving into the ground. Merry’s sword had stabbed him from behind, shearing through the black mantle, and passing up beneath the hauberk had pierced the sinew behind his mighty knee.

‘Éowyn! Éowyn!’ cried Merry. Then tottering, struggling up, with her last strength she drove her sword between crown and mantle, as the great shoulders bowed before her. The sword broke sparkling into many shards. The crown rolled away with a clang. Éowyn fell forward upon her fallen foe.

– “The Battle of the Pelennor Fields,” The Return of the King by J.R.R. Tolkien

This is my favorite scene in the books. It is not my favorite scene in the films. To me, the film scene does not convey the aspects of Éowyn that I have italicized above. Miranda Otto is a fine actress, but I will always prefer book!Éowyn to movie!Éowyn.