Nonstandard Character Design: Weird case with her being the main character and it's quite subtle.Meaningful Name: Lucia is Latin for 'light', and Nanami is Japanese for 'seven seas'.Locked Out of the Loop: Twice, but it doesn't make it past the second chapter of an arc.Kissing Under the Influence: Literally in the manga, Bowdlerised in the anime to be the result of a magic jewel.'I Want' Song: 'Koi wa Nandarou' and 'Splash Dream'.Interspecies Romance: a pink Mermaid Princess who loves Kaito since her childhood.Image Song: 'Koi wa Nandarou' ('What is Love?') and 'Splash Dream.' In the second season, 'Mother Symphony' may also count.This is reflective of her ditzy personality. Idiot Hair: She has a cowlick that stands prominently atop her head.Heroes Want Redheads: The manga's inconsistent colouring means that sometimes her boyfriend is the redhead, and sometimes she is.Heart Symbol: Cheesy hearts appear when Lucia performs her 'Love Shower Pitch'.Hair of Gold, Heart of Gold: She's blonde in mermaid form, in the anime, and in many manga pictures (it's very inconsistent), and she's a cute, kind and innocent princess.Hair Intakes: Her hairstyle has two intakes that kinda look like cat ears.G-Rated Drug: She gets drunk off cola in the manga.Girlish Pigtails: Lucia has ditz/magical girl pigtails.Genki Girl: Easily the most energetic and positive character in the series.Dangerous Thirteenth Birthday: Of course, Lucia's always known she's a mermaid, but in the manga she didn't find out she was a Mermaid Princess until her 13th birthday.Cute Clumsy Girl: Lucia trips over things all the time.Covert Pervert: Not as much as Hanon, though.Awesome Moment of Crowning: End of the manga.Voiced by: Asumi Nakata (Japanese), Sara Polo (Spain), Patrizia Mottola (Italy) Little does she know that nobody turns to foam when they confess anyway. She's also expressly forbidden to confess her love or true identity to Kaito, but she's certain that she won't turn to foam if she finds some loophole. She gets it back from the boy, who turns out to be her classmate and crush Kaito, and realizes that she has to find the other ocean princesses and save the world. The pearl that gives her her power and is directly tied to her life force is gone she gave it to a little boy to save his life when they were six.

In the anime, she's always known that she is the Princess of the North Pacific Ocean, Pink Pearl Voice. In the manga, she was raised to believe that she was a normal mermaid civilian, and lived on the surface as a human with her guardians, 'sister' Nikora and 'pet' Hippo (who is a penguin).

Lucia is the typical shoujo heroine: ditzy and lovestruck, but with a pure heart and a sense of love for her friends. 'All these people are doing their best to find true love! I will not let you laugh at it!'

Pichi pichi pitch hanon