"A superhero named Bookman with a strong and determined face, where the back of his head features an openable book. He wears a full-body, form-fitting superhero suit with a transformation belt around his waist. The suit has a sleek design, with subtle patterns resembling book pages. His face is clearly visible, showing intelligence and resolve, while the open book at the back of his head glows with mystical energy. The scene should balance between showcasing his face and the unique book-head feature." --niji 6