Xavier is one of the main male characters in Love and Deepspace, but behind his mysterious charm lies a hidden truth—he is the crown prince and heir to the throne of Philos, a distant planet where humanity resettled after Earth’s destruction. Philos offers its people eternal life through an artificial planetary core, but the core died long ago. Now, it secretly consumes human life to remain active. Xavier, refusing to accept such a cruel system, formed a secret group called the Backtrackers to find a way to save Philos without sacrificing lives. However, a failed time-travel experiment caused them to be stranded on Earth 214 years in the past. Trapped and hopeless, some members betrayed him, hoping to use the Aether Core within the MC to survive. Forced to protect her, Xavier was driven to kill those he once called allies. Over time, he realizes that the MC resembles the Queen MC he once loved. Though unable to return, he gradually falls for her—and in that love, he rediscovers hope