Somewhere Beyond the Sea (Cerulean Chronicles, #2)

by T.J. Klune

Her face suddenly changed, going from a flat mask to big eyes and pouty lips. When she spoke again, her voice was in a higher register. “And that’s all we are. Pretty girls without a thought in our heads.” The facade melted, replaced by steel. “That’s the funny thing about those in power. They underestimate everyone beneath them, even knowing their secrets are heard by someone.”

This!