The protagonist is An Yi. Before his death, he was a seriously ill young man. After his death, he was reborn as a mermaid. He has never watched anime because he has been treating his illness.
The protagonist is not Su, but he is not weak either. He is a person who is sometimes gentle and sometimes sunny. He is not too strong or bad.
Protagonist introduction
Protagonist: An Yi
Race: Mermaid
Eye color: dark blue
Hair color: dark blue
Weapon: Poseidon Three Hairpin Halberd
Abilities: Sound, water and ice control, sea animals
Identity: King of the sea