Lucia's guardian who serves as her guide. Hippo accompanies Lucia in her search for her pink pearl, and is among those who voice disapproval of her relationship with Kaito. He is also polite, always putting -さん (-san) after every name, even when angry. 

~!At first, he is shown as Lucia's pet penguin, but later on, it is revealed that his real form is that of a cute human boy, but he is embarrassed of how he looks since it's so different from other creatures of the sea. Under his human form, he falls in love with Yuri. And Yuri also loves his human form.!~

~!Later on, he also transforms on a creature called Hippocampus.!~

As the mermaid princess of the North Pacific (one of the seven mermaid kingdoms), Lucia entrusts a magical pearl to a boy who falls overboard a ship one night. Lucia must travel to the human world to reclaim her pearl and protect the mermaid kingdoms. Using the power of music Lucia is able to protect herself and the mermaid kingdoms from a growing evil force.

[Official Website](http://www.tiffanygrant.net/)

Tiffany Lynn Grant is an American voice actress who is known for her English-dubbing work with the former ADV Films on such anime films and television series as Neon Genesis Evangelion, in which she voiced the character Asuka Langley Soryu. Grant is also known for portraying Nojiko in One Piece, Altena in Noir, and Ryoko Subaru in Martian Successor Nadesico. Although appearing in ADV titles, she was an independent contractor, not an ADV employee. Grant currently works at FUNimation and Seraphim Digital.

Grant enjoyed her role as Neon Genesis Evangelion's Asuka so much that she briefly reprised the character in the radio plays and fan-produced anime derived from the fanfiction series Neon Genesis Evangelion: R, as well as cosplaying as Asuka (in Asuka's familiar red EVA-02 plugsuit and her school uniform) at anime conventions.

She was married to [Matt Greenfield](https://anilist.co/staff/101497/), director, co-founder of ADV and also a voice actor. They divorced on January 4, 2018.

[Website](http://www.lucabottale.com/) | [Instagram](https://www.instagram.com/lucabottale/)

An Italian actor, voice actor, ADR director and TV host, mostly known for his roles as [Usopp](https://anilist.co/character/724/Usopp), [Takeshi "Gian" Gouda](https://anilist.co/character/8262/Takeshi-Gouda), [Genta Kojima](https://anilist.co/character/4251/Genta-Kojima) and [Takeshi](https://anilist.co/character/3854/Takeshi) (Brock).

Nuno Tiago da Silva Caetano is a Portuguese folder born on June 10, 1979.

After the final battle against Gaito, Sara had given her life to remain with him. The sea world is now at peace, but only with six mermaid princesses. 
While Caren, Noel, and Coco have returned to their kingdoms, it should be time for Lucia, Hanon, and Rina to do the same. After all, Mitsuki Tarou is leaving for Germany, and Doumoto Kaito is heading to Hawaii. Lucia is devestated, and when things couldn't get any worse, Kaito is lost at sea! Worst of all, a strange angel named Michel has appeared, wanting the mermaids to join him. But on the lighter side, Sara's spirit tells Lucia of Sara's successor, a young mermaid named Seira. The mermaids are in for another adventure!

Lucia is the new girl at school. She and her sister run a public bath that's all the rage. When Lucia meets a terrific-looking surfer boy, there's just one little problem: Lucia is a mermaid-not just any mermaid, but a princess on an important mission to save the seven seas from an evil force bent on taking control of the marine world. Such a responsibility doesn't leave much time for romance. But Lucia vows to protect her world and win the heart of handsome Kaito. 
(Source: Del Rey) 
Note: Includes the one-shots Moonlight Goddess Diana (MOONLIGHT GODDESS ディアナ), Nude ni Natte (ヌードになって, Get Nude) and Cherry Blossom (チェリー ブロッサム), contained within Volume 7 of the manga.