What is the name of the shield maiden who fights alongside Aragorn in the Lord of the Rings universe?

The name of the shield maiden who fights alongside Aragorn in the Lord of the Rings universe is Eowyn. She is a skilled warrior and a member of the Rohirrim, a people of riders and horse breeders who live in the kingdom of Rohan. Eowyn is the niece of King Theoden of Rohan and a strong and independent character in the story.

Eowyn plays an important role in the Battle of Pelennor Fields, where she disguises herself as a male warrior named Dernhelm to fight alongside the Rohirrim and Aragorn. She also confronts and defeats the Witch-king of Angmar, the leader of the Ringwraiths, in a dramatic and pivotal moment in the story.

The shield maiden who fights alongside Aragorn in the Lord of the Rings universe is Éowyn. She is a noblewoman of Rohan who is skilled in battle and rides to war disguised as a man. She ultimately defeats the Witch-king of Angmar, who had been terrorizing Middle-earth for centuries.