Dr. Ratio is a 5-star Imaginary-type character in the game Honkai: Star Rail. He is known for his sharp intellect, analytical mind, and somewhat arrogant attitude. As a member of the Intelligentsia Guild, Dr. Ratio values logic and reason above all else, often challenging others to think critically. Despite his aloof demeanor, he plays a crucial role in supporting the crew with his knowledge and strategic insights, making him a valuable ally and a complex figure within the storyline.