The diadem that crowned the head of Aleytys was in contact with her central nervous system - and invisible to outsiders. But even that star-born fugitive herself did not know what the diadem's powers were or what it could do to or for her. Just having it made her the target of the diadem's unrelenting and non-human owners who had tracked it across space and were still on her trail.

Second in the Diadem series, and Clayton's 2nd book - I can easily recommend the first several books in this series.