Who is Clara in the novel, World After?

Clara is a young mother who had been taken by the angels and fed to the embryonic scorpions. While searching for her sister in the aerie, Penryn frees Clara by breaking the glass container holding the scorpion. Moments later, Penryn is stung by a scorpion. A few days later, while watching the ruins of the aerie for angel activity, Penryn sees Clara crawl out of what was once the basement. Clara has skin that is terribly wrinkled from the lack of moisture after her experience with the scorpions. Otherwise, Clara appears to be perfectly healthy. Clara returns to the Resistance headquarters with Penryn, but she does not fit in. Therefore, when given a chance to escape, Clara takes it. Later, Clara is reunited with her family.