Ryo Yamada is the dormitory superintendent at Edel Rose, reliably managing the student dormitory and taking care of the residents. His duties include consistently cleaning the baths and occasionally preparing late-night snacks like instant ramen. He has a habit of bathing late at night.

He was once a Prism King but was removed from the public eye after disobeying Jin Norizuki's intentions. A scandal was fabricated against him, alleging underage sex and smoking to tarnish his image, which led to his departure from the forefront of Prism Shows.

He has short brown hair, brown eyes, and a mole below his lips on the right side. He often wears glasses and sandals and is sometimes shown with a broom. He is a smoker.

His background includes being a childhood fan of Hibiki Wataru, which inspired him to become a Prism Star.