Merm4id is an all-girl DJ group from the Dig Delight Direct Drive DJ (D4DJ) franchise. The lineup consists of Seto Rika (CV: Hirajima Natsumi), Mizushima Marika (CV: Okada Mei), Hidaka Saori (CV: Hazuki Himari) and Matsuyama Dalia (CV: Negishi Ai). They are primarily an EDM-focused unit and their music is produced by Kazushi Miyakoda.