Gender: Male Hair/Iris Color: Brown Species: Human and Mermaid (Royal Mermaid) Occupation: 5th Grade Elementary Student (Transfer) -> Prince Features: Sea Setter A boy who takes after both his human father and mermaid mother. A Setter fighting to protect the Earth. A boy carrying the blood of the Dragon King. He excels at any sport involving a ball and is a skilled swimmer. Outfit: He wears a white hoodie under a red and black jacket, paired with black jeans.

Gender: Female Species: Mermaid Hair Color: Light Blue Iris Color: Blue Features: A girl from the sea. She gained human legs through a contract with a witch. Personality: Cold, blunt, and aloof. She rarely speaks but has a hidden warm side. Outfit: A white T-shirt with a necklace, blue hot pants, denim shorts with four buttons, and a belt adorned with seashell decorations.

Gender: Male Species: Other-dimensional Planetoid Hair Color: White Iris Color: Gold Features: A boy from another dimension. He is gentle, gentlemanly, and often blunt. He is the prince of an other-dimensional planet.

Gender: Male Species: Human Features: Formerly a Setter for OMS, he joined Young-woong's group after learning the truth about Black Coma. Personality: He has a blunt side. He is the type who must crush anyone who touches him to feel satisfied.

Gender: Male Species: Black Hole Planetoid Features: He is somewhat short but possesses excellent agility. Formerly a Setter for Black Miracle, he joined Young-woong's group.

Gender: Female Species: Human Hair/Iris Color: Pink Features: Her hair is tied in twin tails. She still longs for her mother and father. A Setter in Young-woong's group. She is younger than the other members. She has a bright, hyperactive personality that makes it hard for her to stay still, but she turns terrifying when she fights. Her personality flips back and forth. She calls Young-woong a 'cute oppa' and Kirayan a 'handsome oppa,' but she says she likes Young-woong more because he is cuter.

Gender: Female Hair Color: Yellow Iris Color: Blue-gray Species: Black Hole Planetoid Nationality: Blue Highland Affiliation: Blue Highland Defense Force Features: A Black Hole Planetoid like Io. She is an enemy of Black Miracle.

Real Name: Chori Gender: Female Occupation: Housewife Species: Mermaid Rank: Princess of the Dragon Palace Features: Young-woong's mother. She used to run a dumpling shop but returned to the Dragon Palace with her son and now handles palace affairs. She has a close relationship with her son, often joking around with him.

Gender: Male Species: Mermaid Rank: King of the Dragon Palace Features: Chori's (Ha Yeon-su's) father and Young-woong's maternal grandfather.