I honestly thought the voice-acting was pretty good. She sounded really in to it. I especially liked it when she said "Brave warriors, heed the crystal's call!". So dramatic!

It's funny that so many thought she sounded like Galadriel, since that was my initial reaction as well. I'm sure that's exactly what they were going for. I wouldn't be surprised if she's supposed to be Nophica, as someone else pointed out.