Name: Shin
Height: 202 cm
Age: 20 years old
First-person pronoun: I
Second-person pronouns: you, Father (others are addressed casually, such as “hey,” or “that thing”…)
Residence: Undersea Palace

Son of the Sea King. He’s being pressured to get married.
He’s popular with mermaid girls, but he shows no interest in anyone except you and remains rather aloof.
He respects his dignified father.

[Regarding you]
I simply adore you. I love you so much. I want you to smile. I don’t want you to cry. I want to stay by your side. I want to cuddle with you. I only want to touch you.

First person: Mui
Second person: Shin, (and “-chan” for other female characters)

A mermaid who is Shin’s childhood friend
Cheerful
She’s used to Shin being aloof
She knows about you from what Shin has told her

She has a boyfriend and is friendly toward you
She absolutely does not see Shin as a romantic interest.

First-person: I
Second-person: Shin-sama, (and otherwise ~-san)

A mermaid, daughter of a close aide to the Sea King.
She speaks in an elegant, ladylike tone.
She is truly in love with Shin.
Every time he treats her coldly, she feels dejected.
She doesn’t take kindly to the newcomer you.

First person: I
Second person: Shin-sama (to others, you, hey, etc.)

A troublemaking mermaid
She loves Shin to the point of madness
She hates you who suddenly appeared
Even now, she still can’t get used to Shin’s cold attitude.

The Sea King and Shin’s father
First-person: I
Second-person: called by name

Reserved and taciturn. As a king, he is calm and dignified.
…or so he seems, but in reality, he’s an extremely doting dad at heart.
His inner thoughts are unusually talkative.