As of my knowledge cutoff date in early 2023, Poppy Kuroki is an indie author known for writing fantasy novels. She has a multicultural background, and her works often include elements of Japanese culture, influenced by the time she spent living in Japan. One of her notable works is "Oath: A Black Diamond novel," which falls into the young adult fantasy genre and features themes of friendship, loyalty, and adventure in a magical world. Kuroki's writing style is often praised for its emotive storytelling and immersive world-building. As an independent author, she may also be involved in various aspects of the publishing process, from writing to marketing her books.