Leilani Mahelon

 is one of the protagonists, antagonists, or supporting character in Mermaid Pearl Pretty Cure!. She was a formerly part-timer of Polluted Island who was born as Princess Aquania.

Her pretty Cure ego is Sparkling Mermaid, the sound pearl of Orchestra, based on pool parties/mermaid. Being the only non-Cure in the team.

Hydra
Hydra is an evil form of Leilani. She appears as a gore and brutal sea monster but human appearance. She still wears her meshed cape.