Another of the Cêpan, a woman named Lexa, used her expertise to fly Crayton, Ella, the Chimæra and her friend to Earth. Once on Earth, she created a blog site to try and make the public aware of the impending Mogadorian invasion. The site eventually attracted the attention of Mark James who became her ally and it soon adopted the name "They Walk Among Us".
In The Navigator, they are revealed to be Lexa and Zophie. Zophie was killed by the Mogadorians not long after they arrived on Earth.