The Ghaxien Chronicles

The Last Full Blood
Sarah Johnson skillfully dodged the powerful blast of energy barreling toward her from the training drone. Intercepting the Kanalaball with ease, she hurled the purple ball back in its direction, sending the drone flying to the back of the battle chamber.
Suddenly, the dark room lit up, and Jarnu Kackdrop, Sarah''s head trainer and closest friend since she arrived on the home planet of the Ghaxien Order, Phodaria, walked inside...
For over forty-seven hundred years, the GHAXIEN ORDER has defended the peace of the galaxy. But now, the entire stability of the ORDER is in jeopardy. The only remaining hope lies on Sarah Johnson, a young Ghaxien trainee who is the last remaining direct ancestor of the founders of the ORDER. After a brutal attack by the YELDRIEN, an evil alien race hellbent on destroying the ORDER, Sarah must rise through the ranks and travel the galaxy, battling familiar faces and bitter enemies, as she learns just what it takes to be a part of the GHAXIEN ORDER.