Lu Li Chang is a Chinese scientist affiliated with the Second Earth organization, a space-based human resistance fighting to reclaim Earth from the insectoid creatures called the Blue. She is deeply determined and driven by an intellectual curiosity to understand the nature of the Blue and the reasons behind their invasion of the planet. She shares a close bond with her twin sister, Su Li Chang, and the two likely work together within Second Earth's scientific division. Lu Li Chang's role in the story is a supporting one, primarily contributing through research and analysis rather than direct combat. Her motivations are rooted in her dedication to unraveling the mystery of the Blue, which aligns with Second Earth's broader goal of retaking Earth. There is no documented evidence of significant character development or any special abilities beyond her scientific expertise. Her relationship with her twin sister remains a defining personal trait.