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AnimeMangaToon > Webtoons - Latest News and Reviews > The Castle Swimmer Review: Read It or Skip It Now?

The Castle Swimmer Review: Read It or Skip It Now?

Castle Swimmer Review: Dwell in the World A Beautiful Mermaid Fantasy Story!

April 19, 2025
in Webtoons - Latest News and Reviews
Castle Swimmer Webtoon Review: Kappa and Prince Siren

Prophecies are always meant to be followed, and Castle Swimmer is all about that. For instance, in Narnia, two boys and two girls, with the help of Aslan the lion, will end the evil witch’s rule and usher in a new, peaceful era in Narnia’s history. In Harry Potter, a boy born at the end of July 1980 had the power to defeat Lord Voldemort. Also, in Game of Thrones, the prophecy claims that Azor Ahai shall be born again and again amidst smoke and salt to wake dragons out of stone.

Every fantasy story has a key feature: prophecy, and the character’s life revolves around this prophecy. But what if the said character does not follow the prophecy? Then how will the story unfold? What kind of fantasy story goes against the prophecy?

Castle Swimmer is a webtoon that has broken all the stereotypes of your typical mermaid fantasy story. It is an adventurous tale of two mermaid tales who want to make their path. A path where they don’t have to bear the responsibility because of the prophecy given by people who are already dead. Continue to read to know more about the plot and character of the Castle Swimmer.

Table of Contents

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  • What is Castle Swimmer About?
    • RelatedPosts
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    • Love 4 A Walk Chapter 40: Pam is Just A Neighbour?
    • Castle Swimmer Review: Kappa and Siren’s Journey of Love
    • Castle Swimmer Season 3 Ending: Love, Secrets, And Prophecies!
    • Know the Castle Swimmer Characters
      • Prince Siren
      • Kappa 
    • LGBTQ+ Representation
  • Where Can You Read Castle Swimmer Online?
  • Quickies

What is Castle Swimmer About?

Prince Siren trying to console Kappa
Prince Siren and Kappa

Multiple prophecies revolved around the Beacon and Kappa. For instance, these prophecies were – to gift someone immortality, to provide riches, or to make someone’s armor impenetrable. The story starts with the booming voice of the God of the surface and the creator of the World – “Welcome to existence, Little Mer.”

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So you see everyone had their prophecy that the Beacon had to fulfill. But the House Shark prophecy is a little different. The Prince Siren, the only prince of the Shark house would kill the Beacon with a spear and the blood of Kappa would break the curse that the people are suffering from.

Prince Siren and Kappa meeting for the first time
Prince Siren and Kappa

The curse had taken over the people of House Shark, killing them over the centuries. They were cursed by the mini God, Neris, whose blood was a poison. And as he bled away, he cursed them that they would be the target of tragedy and despair. Their body would be a collection of scars and wounds until nothing was left of them.

Kappa and Siren have big responsibilities but Siren does not want to kill an innocent being and Kappa wants to die to fulfill the prophecy. Kappa and Siren are not your typical main characters who are strong and cold-hearted. Despite the odds, they fell in love and set out to carve their destiny. But for how long they will run away from their fate?

Also Read: 50 Best Fantasy Manhwa You Must Read

Know the Castle Swimmer Characters

  • Prince Siren

“Kappa I’m going to protect you! No matter what happens!” – PRINCE SIREN CASTLE SWIMMER

Prince Siren blushing
Prince Siren

Prince Siren is an icy blue-eye mermaid who is not interested in killing the Beacon. You see this in the second episode of the webtoon, Castle Swimmer, where he questions his guard that The Beacon is innocent and aren’t it is wrong to kill an innocent person. He is calm and diplomatic, you can see that Siren does not enjoy large crowds he rather eat alone. So it is clear that Prince Siren is an introvert.

Prince Siren always feels like a useless prince. As his people see him as some kind of hero who will show them the path of light. Due to this, he lacks confidence. Prince Siren is a non-violent person like his father; he chooses to find his father who left the Castle of Sharks to fulfill the prophecy in a non-violent way.

  • Kappa 

“I don’t wanna be The Beacon.” – KAPPA CASTLE SWIMMER

Kappa talking about the prophecy
Kappa

Kappa was born from a golden orb. So it’s not surprising that he is a shiny golden color mermaid. He also has a tan skin and brown eyes. Another name of Kappa is “the Beacon,” one who will fulfill all the prophecies. However, Kappa has a different personality from that of other heroes. They have strong and cold-hearted personalities, but Kappa has a childlike personality that makes him playful and flirty.

Even though he is very energetic, he is still self-conscious of his actions, afraid that he cannot help others. His way of expressing his feelings can be dramatic sometimes, as you can see throughout the story. Everyone thinks that he will do anything to fulfill the prophecies, even if he has to die, but Kappa is not like that.

LGBTQ+ Representation

Castle Swimmer Characters: Elder Selkie, Prince Siren, and Queen Susca
Elder Selkie, Prince Siren, and Queen Susca

“Our dashing young Prince is in his prime! The Boys must be lining up!”

In an interview with the Comics Beat, the writer of the Castle Swimmer webtoon talked about the LGBTQ+ representation in the story. When the interviewer, Avery Kaplan, asked Wendy about the queer representation she answered that this is not new as she is gay. She told the interviewer that in the early version of Castle Swimmer, she wanted the characters to be gay as she was not out of the closet yet. But in her head, they were secretly gay.

Wendy has a unique way of representing the community. She didn’t blatantly add the gay couple where they have to say every minute that they are gay. She highlighted this subtly and beautifully. From sexuality to gender, Wendy handled everything perfectly. For example: Women characters were not overly sexualized. You can say that Wendy was able to craft Castle Swimmer in a way that shows the equal roles of all.

Where Can You Read Castle Swimmer Online?

Kappa as a child
Kappa

Several websites are available where you can read the Castle Swimmer webtoon but Webtoon provides an easy and smooth experience.

If you have questions regarding the Castle Swimmer webtoon, please ask in the comments below. For more unbiased reviews and popular manhwa recommendations, stay tuned with us. 

Quickies

Castle Swimmer is a unique fantasy webtoon that defies typical prophecy-driven narratives. The story revolves around Prince Siren of the Shark House and Kappa, known as "The Beacon." While prophecies predict Siren will kill Kappa to end a curse, both characters refuse to follow their fates. Siren, a non-violent and introverted prince, rejects the idea of killing an innocent, while Kappa, despite being expected to fulfill the prophecies and die, wishes for a different life. The series explores themes of destiny, love, and self-determination as the two main characters—each with distinct personalities—fall in love and fight to carve their own paths. Castle Swimmer also features subtle LGBTQ+ representation, as the creator, Wendy, incorporated characters' sexuality and gender without making it the main focus, highlighting equality and representation throughout. The story is filled with compelling characters, including the strong-willed Prince Siren and the playful yet conflicted Kappa. The webtoon is available to read on Webtoon, offering an engaging experience with beautifully crafted art and storytelling.
Tags: Castle Swimmercastle swimmer reviewKappaPrince Siren
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