The truth hit him. Jason wasn't quite Roman anymore. His time at Camp Half-Blood had changed him. Reyna had recognized that. Apparently, so did the undead legionnaires. If Jason no longer gave off the right sort of vibe, or aura of a Roman leader...
In "The House of Hades," Jason reflects on the significant changes he has undergone during his time at Camp Half-Blood. He realizes that his identity as a Roman has been altered, indicating that his experiences have molded him into someone different from who he once was. This transformation is acknowledged by other characters, including Reyna and the undead legionnaires, who sense that he no longer embodies the qualities typically expected of a Roman leader.
This revelation about his identity strikes Jason deeply, signaling a shift in how he perceives himself and his role among his peers. The acknowledgment from others highlights the profound impact of his journey and the blending of cultures he has experienced, leading to a complex relationship with his heritage and identity.