Eltariel

Eltariel, also known as the Blade of Galadriel, was an ally to Talion and Celebrimbor that wielded the light of Galadriel , she helped Talion in his fight against Sauron's army in Middle-earth: Shadow of War, after convincing from the wraith Celebrimbor, she took the new ring from Celebrimbor's hand that caused Talion to start dying again, along with that becoming one with the wraith.

After fighting Sauron atop Barad-Dur and defeating him, Sauron cut her ring finger while Celebrimbor was trying to dominate him, overpowering Eltariel and merging with Celebrimbor to enter a perpetual state of war as a flaming eye on top of Barad-Dur. Eltariel meanwhile took the New Ring to continue her quest and hold back the Nazgûl and ensure they don't leave Mordor.