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Mermaid Princesses | Humans | Mermaid Kingdoms | Villains

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Hippo

"What are you doing, Lucia-sama!?"

^{Click here to see his human form} 

Hippo is the series' talking animal mascot, a fat little penguin in a sailor suit who speaks with a shrill voice and follows Lucia around. He's currently assigned to protect Lucia, but was initially created for another purpose. He thinks of Lucia as a failure princess because of her forbidden love, interest in the surface world and terrible singing voice, but, in fact, he's no better. Though he's obnoxious and shoves the rules into Lucia's face, he learns to relent when he, too, finds out what she means by The Power of Love.

Age: 8-11 (Penguin), 13-15 (Human form)

Voiced by: Miyako Ito (Japanese), Miriam Valencia (Spain)

Tropes associated with Hippo:

• Humans Are Ugly: Hated his human form until he saw how many girls he attracted.

• Meaningful Name: At first you think it's just because he's fat, but "Hippo" isn't even short for "hippopotamus" at all. In fact, it's for "Hippocampus", as in the legendary winged seahorse.
• Mr. Fanservice: He was naked when he first appeared in his human form and in-universe he ends up becoming a major Chick Magnet.

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Nikora

Voiced by:

A mermaid who poses as Lucia's older sister and is the hotel manager.

Age: 20-23

Voiced by: Eri Saito (Japanese), Elena Ruiz de Velasco (Spain)

Tropes associated with Nikora:

• Cool Big Sis
• Day in the Limelight: Episode 41, also for Maki-san.
• Spell My Name With An S: Nicola.

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Madame Taki

A fairly incompetent and kind of old fortune-teller whose true form is a clam. She mostly functions as a gag character, though her one and only appearance in the manga treated her seriously.

Age: 75+

Voiced by: Kumi Yamakado (Japanese), Ana Isabel Hernando (Spain)

Tropes associated with Madame Taki:

• The Comically Serious
• Cool Old Lady
• Day in the Limelight: Episode 71 gives most of the information about her. She has a fiance named Somegoro who's a squid and a doctor, and she doesn't know how old she is. To a much lesser extent, episode 20 also counts.
• Eyes Always Shut: She never opens them once.
• Immortality: Implied.
• I Will Wait for You: Gender-inverted; Somegoro promises to wait for her.

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Aqua Regina

The goddess of the ocean, mother of all mermaids. She's incapacitated for a good chunk of the first season. She's responsible for giving upgrades for the mermaids.

Voiced by: Kumi Yamakado (Japanese), Ana Isabel Hernando (Spain)

Tropes associated with Aqua Regina:

• Big Good
• Meaningful Name: "Aqua Regina" means "Water Queen" in Latin.
• Ms. Exposition
• Royals Who Actually Do Something: Even when she's incapacitated in the first season, she still musters up the strength to give new songs and power ups to the mermaids. During the final battle in Pure, she even joins in and sings with the Mermaid Princesses to defeat Michel.
• Sealed Good in a Can: She lost most of her powers ages ago and the only way to summon her is for all seven Mermaid Princesses to come together.