Lina Davis is a thirteen-year-old student at Center City Middle School and a member of the school's cheerleading squad. She comes from a wealthy family, a fact that creates tension with her close friend Joey Jones, whom her father and older brother, William Davis, consider a bad influence because of his lower economic status. Despite this family disapproval, Lina genuinely cares for Joey and continues to spend time with him. She is a major heroine of the story and often finds herself in dangerous situations, which initially prompt Joey and the robotic Heroman to come to her rescue. Her personality is characterized by warmth and loyalty; she does not let her family's objections dictate her friendships. As the series progresses, Lina's role evolves from a person frequently needing protection to a more active participant, particularly when her brother becomes involved with the alien threat known as the Skrugg. She joins the effort to find and rescue William, demonstrating bravery and determination. Her motivations are rooted in her affection for Joey and her desire to protect her family. Lina possesses no supernatural abilities; her strengths lie in her empathy and her courage to stand by her friends even when it puts her at odds with her own family. Her relationships with Joey and her brother are central to her arc, and she shows growth by stepping out of her sheltered background to confront the dangers threatening her world.