Philip Sonozaki is one of the two main protagonists in the anime and tokusatsu series Kamen Rider W. Known for his incredible intelligence and encyclopedic knowledge, Philip serves as the brains of the detective duo. He partners with Shotaro Hidari to become Kamen Rider W, using his knowledge to solve mysteries and fight Dopants. Philip's mysterious past and connection to the Sonozaki family play a crucial role in the unfolding story and the secrets behind the Gaia Memories.