Indeed, "she was then of Amazon disposition and bound up her hair as a crown when taking part in athletic feats". This custom was the origin of her secondary name Galadriel, as it meant "Maiden crowned with gleaming hair". This gleaming of her hair was not a poetic reference: her hair was held a marvel unmatched. It mingled and surpassed the gold hair of her father and the starlike silver of her mother, so the Eldar said that both lights of the Two Trees were captured in her tresses.
It was also said that this gave first the idea to her uncle Fëanor of capturing the merged light of the Trees, which would result in the Silmarils. He asked her three times one of her tresses, but she always refused. Fëanor and Galadriel were always unfriends,
both being the greatest Eldar in Valinor; and if Fëanor was greater than her, she was wiser, and her wisdom grew with the long years. For she also had an outstanding gift to see into the minds of others, and she hated and feared the darkness in Fëanor.
There was still bliss in Valinor when she was born, but soon she was influenced by the unrest of the Noldor and lost her inner peace ever after.
She was proud like most of the House of Finwë, and like her closest brother Finrod, "she had dreams of far lands and dominions that might be her own to order as she would without tutelage". But deep in herself, she had the noble spirit of the Vanyar, which did not allow her to forget the reverence to the Valar.
During the Darkening of Valinor and the rebellion of Fëanor, Galadriel was the only woman of the Noldor who stood among the rising princes. She swore no oath, but the words of Fëanor concerning Middle-earth kindled a desire in her heart, as she was eager to see those wide unguarded lands and rule a realm of her own. Like the rest of the House of Finarfin, she was also supportive of the Exile by the desire to aid their Sindarin relatives in Middle-earth.
......
Second Age
At the beginning of this age, Celeborn and Galadriel dwelt for a time in Lindon, south of the Lune, while Gil-galad ruled in the north.[27] Both left Lindon before the years 10-20, when Gil-galad became king in that land, apparently thanks to her influence.They entered Eriador and dwelt for a while around Lake Nenuial, being followed by many Noldor, Grey-elves and Green-elves. They were considered as the Lord and Lady of the Eldar in Eriador.[29]:234
Probably around S.A. 300,[note 3] Galadriel and Celeborn had a daughter: Celebrían.
Circa the year 500, Sauron began to stir Middle-earth again,[27] but his name was not known. He was however perceived by Galadriel, who noticed there was a controlling evil, and that it was spreading above the world, coming from the East, beyond the Misty Mountains. She also thought this 'residue of evil' could only be fought with an alliance of all its enemies. Therefore she and Celeborn moved eastwards and establish the realm of Eregion near Khazad-dûm. Celeborn was not fond of Dwarves, but she saw the importance of getting close to them, to whom she even saw with military interests. Also, she was a Noldo, therefore close to them in mind and in the passion for crafts; and in Valinor she had learned from Yavanna and Aulë, the creator of the Dwarves himself.[29]:235
Some Noldor were also interesed on establishing near Khazad-dûm because they knew mithril had been discovered there. Therefore many Elven-smiths came to Eregion and created good relations with the Dwarves. Celebrimbor, a descendant of Fëanor (and therefore a distant cousin of Galadriel), was the greatest of the craft-men and the Lord of Eregion. He was its main builder and in 750 the main city of the realm was begun, Ost-in-Edhil. The power of Galadriel and Celeborn also grew: thanks to the Dwarves of Khazad-dûm, they had contact with the Nandorin realm of Lórinand, at the other side of the Misty Mountains. Thanks to Galadriel's influence upon Lórinand, Sauron's machinations there were fruitless.[29]:236
About the year 1200, Sauron came in disguise to Eriador, but he was only welcomed in Eregion by Celebrimbor and the Elven-smiths, who were interesed on his advices of craftship.[29]:236 Galadriel was not deceived, and rejected him, saying that he was not in the train of Aulë as he claimed.[30] "He perceived at once that Galadriel would be his chief adversary and obstacle, and he endeavoured therefore to placate her, bearing her scorn with outward patience and courtesy". At the same time, without her knowledge, Sauron influenced Calebrimbor and his Gwaith-i-Mírdain against Galadriel and Celeborn. Finally, he moved them to rebellion and they seized the power of Eregion at some time between 1350 and 1400. Thus, Galadriel and Celebrían left through Khazad-dûm to Lórinand, although Celeborn would not enter the Dwarvish realm and remained in Eregion.[29]:237
When Sauron made the One Ring in S.A. 1600, his treachery was discovered by Celebrimbor.[27] The elven-smith came to Lórinand, seeking counsel from Galadriel. They did not find the strenght to destroy the Rings of Power, but she adviced him to hide the Three Rings of the Elves where Sauron could not find them. Therefore he gave her Nenya, the White Ring, and the other Rings were given to other Elven lords.[29]:237 This was done in 1693, the same year Sauron began the war against the Elves.