Proteus - The Last Survivor (Book Three)

"For Zenni and Saya, the weight of their world is on their shoulders as they return to Neo Alphius with new hope having found their long lost kin, no longer survivors, but thriving on a strange alien world called Earth. Returning with Miras's sister ships Terrik and Lunar along with all the help their stricken people need, it soon becomes clear the situation is more critical than they imagined.
At Miras's heart is an experimental reactor that only her conscious mind can control and with Mira...