Karen Character_friends

The ocean goddess who gives the Mermaid Princesses new songs and upgrades for their gear.

Mermaid Princess of the South Pacific Ocean and keeper of the yellow pearl.

Hanon is the Mermaid Princess of the South Pacific Ocean, and the keeper of the Aqua Pearl.

Lucia's guardian who serves as her guide.

Kaito, the son of a pair of musicians, is an avid surfer, as well as Lucia's love interest.

Merimaid Princess of North Pacific Ocean, keeper of the pink pearl, the main character of the story.

Noel is the Mermaid Princess of the Arctic Ocean, the keeper of the Deep Blue Pearl.

Originally hates her for Noel's capture, Caren becomes friends with Rina after finding out the truth.

Mermaid Princess of the Indian Ocean and keeper of the orange pearl.

Seira is the future Mermaid Princess of the Indian Ocean (Sara's successor), and keeper of the Orange Pearl.