Matsumoto Trilogy Books in Order

Sixteen-year-old Vera and her bodyguard Roman communicate through computers implanted in their heads. Sent on an impossible mission by an emperor who wants them dead, they must use that connection to survive an empire working against them.

Vera is stranded on a prison planet among shadowy aliens and supposed allies who may want her dead. To escape, she must abandon her old passivity and become resourceful enough to survive the dangers around her.

Reunited with Roman, Vera faces the prospect of claiming the Blackwatch Empire's throne or dying in the attempt. Her allies and implant-enhanced abilities must serve her against an interplanetary army, while their relationship faces new pressures.