
As one of the seven mermaid princesses, Lucia must travel to the human world to protect the mermaid kingdoms.
Browse episodes by season for this series.


2003-04-05
Aired 2003-04-05
Mermaid Princess Lucia leaves her undersea kingdom in search of her magic pearl, who she left in a nearly drowned boys custody 7 years ago. See recap for complete info.

2003-04-12
Aired 2003-04-12
Hanon discovers her identity as the Blue Pearl Voice. After an underwater battle with a dark follower, she joins Lucia on land to help protect the sea kingdoms.

2003-04-19
Aired 2003-04-19
A new mermaid princess, Rina Toin, arrives at school, causing a stir. Lucia and Hanon become friends while facing off against a sea demon and searching for their lost pearls.

2003-04-26
Aired 2003-04-26
In this episode, a lonely mermaid princess named Rina Toin transfers to Lucia's school. Rina is aloof and guarded due to her past trauma, but she eventually joins Lucia and Hanon to stop a sea demon.

2003-05-03
Aired 2003-05-03
Lucia and Hanon as they worry about a pink dolphin named Momo who has been separated from her mother and captured by an aquarium. Lucia is determined to reunite the two, leading to a confrontation with a sea demon at the aquarium.

2003-05-10
Aired 2003-05-10
A mysterious love-related attack plunges the city into chaos. Lucia, Hanon, and Rina join forces to restore balance. Their bond of friendship is strengthened through song.

2003-05-17
Aired 2003-05-17
Lucia becomes jealous of a girl close to Kaito, which the enemies exploit to weaken her heart. Supported by Hanon and Rina, she realizes that her love is stronger than her doubts.

2003-05-24
Aired 2003-05-24
A demon plunges the inhabitants into emotional coldness. People become distant, almost inhuman. Lucia must believe in the warmth of her feelings to break the magical ice.

2003-05-31
Aired 2003-05-31
A song essential to the power of the mermaids is stolen. By recovering it, Lucia, Hanon, and Rina discover the importance of harmony among themselves. Their music becomes more powerful and coordinated.

2003-06-07
Aired 2003-06-07
Rina is chosen as a model by a modeling agent who sees her as the mermaid he saw a long time ago. They also get a chance to overcome their past.

2003-06-14
Aired 2003-06-14
Lucia receives a special ring that could help her get closer to Kaito, but the villains want it for themselves.

2003-06-21
Aired 2003-06-21
Lucia and Kaito argue over a misunderstanding while a new attack puts them both at risk.

2003-06-28
Aired 2003-06-28
Lucia must participate in a ritual that tests her power and her heart.

2003-07-05
Aired 2003-07-05
Lucia relives important moments with Kaito while the villains plan a new attack.

2003-07-12
Aired 2003-07-12
Lucia and Kaito make a promise on the seashore; at the same time, the tension between Lucia's duty and her love grows.

2003-07-19
Aired 2003-07-19
Lucia tries to hide her true feelings, but her emotions affect her singing and her strength as a mermaid princess.

2003-07-26
Aired 2003-07-26
An unexpected moment between Lucia and Kaito changes the dynamic of their relationship and leaves Lucia even more confused

2003-08-02
Aired 2003-08-02
A young visitor appears and disrupts the balance between the protagonists, while the villains try to take advantage of the situation

2003-08-09
Aired 2003-08-09
With the arrival of summer, new temptations and jealousies arise; the mermaids must remain calm to continue fighting.

2003-08-16
Aired 2003-08-16
Lucia finds or writes a love letter related to the sea, which puts into words what she does not dare to say.

2003-08-23
Aired 2003-08-23
The first love of one of Hanon's is explored, and how it affects the group of friends.

2003-08-30
Aired 2003-08-30
A girl appears who steals glances and attention, causing insecurities and misunderstandings among the protagonists.

2003-09-06
Aired 2003-09-06
A kind of love "fever" runs through the characters; feelings get out of control as the villains attack.

2003-09-13
Aired 2003-09-13
Lucia fantasizes about being Kaito's girlfriend, while at the same time being forced to face the risks of her double life.

2003-09-20
Aired 2003-09-20
Kaito shows a deeper, more vulnerable side under the moonlight, and Lucia feels even closer to him.

2003-09-27
Aired 2003-09-27
Karen enters the scene with her own song and story, further complicating the situation between mermaids and enemies.

2003-10-04
Aired 2003-10-04
Naivety in love puts someone in danger; the mermaids learn that blindly trusting can have consequences.

2003-10-11
Aired 2003-10-11
The emotional bonds between the girls and with their loved ones are strengthened as they face a more serious threat.

2003-10-18
Aired 2003-10-18
An important confession is given indirectly or "masked", without revealing the whole truth about identities and feelings.

2003-10-25
Aired 2003-10-25
A cold stare, literally or metaphorically, marks a distance between characters just as the battle intensifies

2003-11-01
Aired 2003-11-01
The mermaids fall, or almost fall, into a trap well planned by the enemies, putting their secret and their lives at risk.

2003-11-08
Aired 2003-11-08
The dreams and desires of the protagonists are tinged with the love they feel, as they prepare for greater challenges.

2003-11-15
Aired 2003-11-15
Lucia and her friends visit an amusement park, but the villains turn the fun into chaos.

2003-11-22
Aired 2003-11-22
A young mermaid appears disoriented on the shore, and the girls must protect her from a surprise attack.

2003-11-29
Aired 2003-11-29
Lucia faces a difficult emotional moment.

2003-12-06
Aired 2003-12-06
Lucia and Hanon take in a mysterious lost baby who prefers Lucia and gets jealous of Kaito! Can the girls protect their tiny new guest from the Dark Lovers?

2003-12-13
Aired 2003-12-13
The girls chase the tale of magical mermaid beads that grant everlasting love, but when enemy forces intervene, the princesses must fight back!

2003-12-20
Aired 2003-12-20
Lucia gets jealous when an older woman keeps a close eye on Kaito during the holidays, but the mermaid princesses must focus and protect Christmas from enemy forces!

2003-12-27
Aired 2003-12-27
Chaos erupts at Hotel Pearl Piari when the Dark Lovers launch a sneaky surprise attack! The mermaid princesses must work together to clear out the enemies.

2004-01-03
Aired 2004-01-03
Lucia tries to grant Kaito's New Year's wish through a magical dream, but the Dark Lovers crash the dream realm!

2004-01-10
Aired 2004-01-10
Nikora gets a surprising marriage proposal from Maki, driving the girls to meddle in their romance before secret mermaid rules get broken!

2004-01-17
Aired 2004-01-17
When Hippo and Yuri are caught meeting in secret, Hippo is forbidden from seeing her. Heartbroken, Lucia tries to arrange a reunion until dark forces follow!

2004-01-24
Aired 2004-01-24
A tragic melody draws the mermaid princesses into a trap when a girl befriended by an enemy uses her voice to lure them in. Can they break the spell?

2004-01-31
Aired 2004-01-31
Trapped in a sudden blizzard, Lucia and Kaito get stranded together, but a dark attack threatens to ruin their icy moment. Can the mermaids save the night?

2004-02-07
Aired 2004-02-07
Lucia struggles with green-eyed jealousy as Kaito spends time with another girl, but enemy forces force the mermaids to act fast!

2004-02-14
Aired 2004-02-14
Kaito prepares to leave for Hawaii, leaving Lucia torn over revealing her true identity before he goes.

2004-02-21
Aired 2004-02-21
The princesses receive a dark invitation from Gaito, drawing them into a dangerous trap as the final conflict nears.

2004-02-28
Aired 2004-02-28
Kaito is tormented by dark visions of his true origin, forcing him to face a shocking reality about his connection to Gaito!

2004-03-06
Aired 2004-03-06
As Gaito's castle rises, Kaito learns the full truth about his destiny while Lucia and the princesses prepare for the ultimate battle.

2004-03-13
Aired 2004-03-13
Sarah joins Gaito, leaving the mermaid princesses heartbroken, but Lucia refuses to give up hope on her friend.

2004-03-20
Aired 2004-03-20
All seven mermaid princesses unite at last! Combining their full power, they launch a final assault on Gaito's castle to save the world.

2004-03-27
Aired 2004-03-27
Peace returns to the ocean, and Lucia and Kaito share an unforgettable moment before new journeys begin!
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