Raku Ichijo is a fictional character from the anime and manga series Kamen Rider Build. He is known for his role as a scientist and a key figure in the story's conflict. Raku is characterized by his intelligence and dedication to his research, often working on advanced technology to combat the series' antagonists. In the series, Raku's inventions play a crucial role in the development of the main character's abilities. His contributions highlight the importance of science and innovation in the fight against evil, making him an essential part of the Kamen Rider universe.