Ryoko Sonoda is a character in the series Kamen Rider Fourze. She serves as the school nurse at Amanogawa High School, but secretly leads a double life as the Virgo Zodiarts, one of the main antagonists. As the Virgo Zodiarts, she possesses mysterious powers and plays a significant role in orchestrating events behind the scenes, challenging the protagonist and his allies. Her dual identity and complex motivations add intrigue and depth to the unfolding narrative.