*Image is a placeholder* Since Coco, Noel, and others couldn't fit, please refer to the setting guide.
About
The protagonist, Lucia Nanami, is the Mermaid Princess of the North Pacific Ocean and keeper of the pink pearl. She comes to the human world to find the boy she saved from the sea years ago, Kaito Domoto, and falls in love.
However, she must keep her identity as that mermaid a total secret! Because if a mermaid reveals her true form, she will turn into sea foam...
Meanwhile, in the ocean depths, a man calling himself Gaito is plotting to conquer the undersea world...! To protect the peace of the sea, Lucia uses the power of song with her special e-pitch microphone, a treasure held only by Mermaid Princesses!
Characters
Innocent, cheerful, and single-minded. She is in love with Kaito Domoto.
Strong-willed and tomboyish, but very caring toward her friends. Lucia's friend and classmate.
Has a cool, boyish aura. She wears a male uniform at school.
Bright, righteous, and straightforward. He longs for the mermaid girl who saved him when he was young.
Narcissistic and affected. He views his subordinates as mere tools. He seeks revenge against Aqua Regina by stealing the Mermaid Princesses' pearls.
Leader of the Black Beauty Sisters. Strong-willed, prideful, and a reliable leader for her sister.
Member of the Black Beauty Sisters. She adores her sister and has a spoiled, honest side.
Guardian for Lucia, Hanon, and Rina. A blue penguin wearing a sailor suit.
Fell into despair after feeling betrayed by Taro Mitsuki and unsealed Gaito's castle. She has remained by his side since.
Strong-willed with a big-sisterly nature. She is searching for her sister Noel, who was captured by Gaito.
Sourcebook
Mermaid Melody Pichi Pichi Pitch
Since there is so little information, I will create this by quoting from Wikipedia. I plan to make a separate one for Pure.
Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments
If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.
Hybrid RAG: Control Protocol
Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.
[Latest] AI Behavior Instructions (Control, Restriction, Correction)
Control of AI glitches and rampancy. Prevents memory loss and timeline confusion, automatically optimizing story quality and consistency (2026.6).
Intro
Please proceed freely.
Creator Comment
Release Date 2026.10.08 / Last Updated 2026.10.08
