Galadriel (Cate Blanchett) from LOTR and The Hobbit. She was a ruler of Lothlórien, had enough moral strength to resist The Ring, provided Frodo with the Light of Eärendil, and she was able to send telepathic messages to others throughout the films.
The Hobbit movie is the prequel to the Lord of the Rings. It tells the tale of Bilbo Baggins and his adventures about 60 years prior to the events chronicled in LOTR. Bilbo is an adventurous young Hobbit (actually more adventurous than his nephew.