Reika Nikaidou is one of the main heroines in the visual novel series Akatsuki no Goei. She is the proud and elegant daughter of the powerful Nikaidou family, known for her refined manners and strong sense of responsibility. Despite her strict upbringing, Reika has a kind heart and gradually warms up to the protagonist, Kaito. Her role in the story is central, as she represents the challenges and expectations of high society, while also developing a close and dynamic relationship with the main character.