Hachiroku Maitetsu is the main heroine in the visual novel and anime series 'Maitetsu.' She is a humanoid RailLord, an anthropomorphized controller of a steam locomotive, found and awakened by the protagonist. Hachiroku is characterized by her calm and polite demeanor, her curiosity about the world, and her devotion to her locomotive. Throughout the series, she assists in efforts to revive the local railway and develops close relationships with the other characters, playing a central role in the story's emotional and technological themes.