RoaRomin (ロアロミン Roaromin) is an Elementary School Band in the Yu-Gi-Oh! SEVENS anime, which is led by Roa Kassidy. They debuted as an independent band a year before the series began, and quickly became significantly popular. Roa uses them in his quest to become the King of Duels.
The band's name comes from its most popular and prominent members; the Kassidy cousins Roa and Romin. He initially wanted to call the band a more plain "Roa and Romin", but she did everything she could to make him drop the conjunction and stylize their names struck together. She later cited this as an example of his lame naming sense.