Barbie plays Lumina, a mermaid girl with the power to change the color of pearls. Cheerful and creative, Lumina finds herself working in a mermaid salon customizing fabulous hairstyles. And when Lumina has the chance to attend the royal ball, her friends adorn her with a gown fit for a princess. At the ball, villains try to seize power over the kingdom, and Lumina finds within herself an unexpected power that proves she is much more than a hair stylist.
| Actor | Role |
|---|---|
 Kelly SheridanLumina (voice) | Lumina (voice) |
 Katie CrownKuda (voice) | Kuda (voice) |
 Mark OliverKing Nereus (voice) | King Nereus (voice) |
 Rebecca ShoichetQueen Lorelei (voice) | Queen Lorelei (voice) |
| TTrish PattendonScylla (voice) | Scylla (voice) |
 John NovakCaligo (voice) | Caligo (voice) |
 Simon HillFergis (voice) | Fergis (voice) |
 Peter NewMurray (voice) | Murray (voice) |
 Kathleen BarrMadame Ruckus (voice) | Madame Ruckus (voice) |
 Patrick GilmoreGarth (voice) | Garth (voice) |
 Louis ChirilloWormwood (voice) | Wormwood (voice) |
 James HiguchiSpike (voice) | Spike (voice) |
 MacKenzie PorterCora (voice) | Cora (voice) |
 Nicki BurkeSandrine (voice) | Sandrine (voice) |
 Tabitha St. GermainPurple Mer-Teen (voice) | Purple Mer-Teen (voice) |
 Brian DoeDelphin (voice) | Delphin (voice) |
 Jeff Evans-ToddDolphin (voice) | Dolphin (voice) |