R. Dio Ga Ga

 is a VIP and the manager of the Majorkey Music in the 6th floor of the Modern Era.

He is most likely based off of Queen's leadsinger Freddie Mercury, as he looks very similar. His name would then be a reference to Queen's song "Radio Ga Ga". His greeting, "Mama", is sung similarly to another Queen song, "Bohemian Rhapsody".