From The Lord of the Rings wiki
Galadriel
Galadriel is one of the most powerful and ancient Elves in Middle-earth, serving as the Lady of Lothlorien and a key guardian against the influence of Sauron.
Origins and Role
Galadriel was a royal Elf of the Noldor who travelled to Middle-earth during the First Age. By the time of the War of the Ring, she resided in the woodland realm of Lothlorien alongside her husband, Celeborn. As the bearer of Nenya, the Ring of Water, she used her immense power to preserve the beauty of her realm and protect it from the encroaching shadow of Mordor.
Influence on the Quest
Galadriel played a pivotal role in assisting the Fellowship of the Ring after they fled the mines of Moria. She provided the group, including Frodo Baggins, Samwise Gamgee, and the other hobbits, with essential supplies and gifts that proved vital to their survival. Her foresight and wisdom were instrumental in guiding the heroes, and she famously resisted the temptation to claim the One Ring for herself when it was offered to her by Frodo.
Legacy
Following the defeat of Sauron, Galadriel was among the last of the great Elven leaders to depart Middle-earth for the Undying Lands. Her legacy as a protector and a source of counsel for figures like Gandalf the Grey remains a cornerstone of the history of the Third Age. Her presence offered a rare glimpse into the ancient power of the Eldar who witnessed the light of the Two Trees of Valinor.