"She's a very, very young elf," Lilly said. "She's only 600 years old, unlike Legolas who's like, 1,900 years old and Thranduil who's about 3,000 years old. She doesn't have quite the wisdom and pose that those two boys do; she's a little more... gritty. A little more spontaneous, passionate perhaps."
She added, "To play this character I need to have a certain amount of grace. But I'm also supposed to be an absolutely ruthless, deadly killer."