Mermaid Melody: Alala, Lady Bat, Lanhua, Madame Taki, Maria, Meru, Sara, and Seira Amagi.

 Alala is the attention loving servant of Michel who wants to become a famous idol.  She is upbeat and calls herself "The wings of dreams and decadence".

Lady Bat is one of Michel's servants and the self proclaimed "The wings of love and pleasure".

Lanhau is Michel's butterfly servant and refers to herself as "The Wings of Desire and Contentment".  She can divide herself into a dozen chibi versions of herself.

Madame Taki is a fortune teller and the owner of the Pearl Piari Hotel.  Her predictions have mixed results sometimes being right and sometimes being wrong.  She is capable of turning into a clam.

Maria is one of Gaito's Dark Lovers and of the group seems to be the closest to him.  Maria is smart and energetic and is capable of controlling ice and snow.  Her original form was an eel.

Meru is a mermaid from the South Atlantic Ocean.  She appears in episode 18 to ask Hanon and the others to help find her mother.

Sara was the Mermaid Princess of the Indian Ocean and the Orange Pearl Voice.  She once fell in love with Tarou; however, after Tarou left her she fell into despair and joins Gaito and his attempt to take over a marine world. 

Seira replaces Sara as the Indian Ocean Mermaid Princess and the Orange Pearl Voice.  She tries to stay positive and encouraging; but also berates Lucia occasionally.