Galadriel by Alan Lee. Many of the elves were tried and found lacking about 10,000 years before LotR takes place. Some of them (including Galadriel's brothers) abandoned many of their own to die of cold and hunger; this was known as "The Kinslaying." This is why Galadriel seems surprised when she says she has "passed the test" in FOTR - she had some slight involvement in The Kinslaying, and wasn't sure that she was going to be allowed to return to Valinor.
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.