Secondary Rider ofKamen Rider W. Terui Ryuis a young police superintendent in charge of investigating paranormal crimes. However, he loathes his host city, and only does his job to find the "Manwith theWMemory", who killed his family. UnlikeDouble, Ryu only needs himself to turn into Accel, a red Rider with the ability to transform into a motorcycle. He also has the ability to transform into the blue, speed-oriented Trial Form, as well as the all-around Booster Form but only in W Returns.