Rainbow Bubblegem recounts the magical adventures of seven mermaid princesses who must go to school on land to search for enchanted jewels to save their undersea realm from an evil witch.

Jung Hye-wonas Purple Star (voice)
Jo Kyoung-ias Red Ruby (voice)
Kim A-rongas Green Leaf / Monnaie (voice)
Kim Ga-ryungas Orange Amber (voice)
Jeon Hae-rias Blue Sapphire / Shinram / White Gold (voice)
Kim Eun-ahas Yellow Gold / Leo Wood (voice)
Yeo Min-jeongas Indigo Keen / Heart Corn (voice)
Um Sang-hyunas Pink Star (voice)
Jeon Sook-kyungas Stings / Black Dia (voice)
Jeon Tae-yeolas Prickle (voice)