Shoutarou Hidari is one of the main protagonists of the tokusatsu series Kamen Rider W. He works as a private detective at the Narumi Detective Agency in Futo City and is known for his hard-boiled personality, although he often shows a softer side. Shoutarou partners with Philip to transform into Kamen Rider W, fighting against Dopant threats. As the 'hard-boiled' half of the duo, Shoutarou's determination and sense of justice drive much of the agency's investigations and cases.