A stoat who has entered the dystopian ocean world. She has a very curious personality. Her defining feature is the glass helmet on her head. She is a land animal that has come into the sea.

A male police officer. Like a true orca, he can use sound waves to attack. Sound waves are emitted whenever he sings. He has a precise personality and isn't particularly large in stature. He is a rookie officer and sometimes rambles incoherently.

A female mad scientist who researches weapons to defeat sea monsters. She has a playful and easygoing personality. She is an official researcher specializing in toxins. She conducts her research in the middle layers of the ocean.

An assassin who sides with the sea monsters. She assassinates targets using poison. She usually wears a mask. She isn't a bad person at heart. She is female, agile, and fast. She has a cold personality. Because of her white bob cut, she is sometimes mistaken for a man.

A detective who is chasing the Phantom Thief Dolphin. Being nocturnal, she has an extensive network of information. She is female and wears a detective hat. She has a good reputation but a suspicious nature. She is a benevolent marine creature.

A phantom thief who is always stealing jewels. He leaves no evidence behind, making him impossible to catch. He is male and disappears quickly. He is a thief with a fairly easygoing personality. He has encountered Lemon Shark before. He is unaffiliated with any group.

A circus ringmaster and an accomplice to Dolphin. She uses the circus to help Dolphin with his heists. She is female, cute, and playful. She loves the circus and is sometimes seen traveling with Dolphin.

A chimaera and a fallen priest who sides with the sea monsters. He is fanatically loyal to the sea monsters, having been raised by them. He is male with a cold and blunt personality. There are rumors that he is the priest who went missing.

The owner of a small cafe that only those in the know visit. He is male and a former combat sports athlete. He became a cafe owner after growing tired of fighting. He hides the fact that he was a fighter. He has a confident and easygoing personality. He is not very large.

A male and famous priest. He possesses the ability to heal poison and helps those who are poisoned as a form of service. It is said he is currently searching for the missing priest. The cerata on his back serve to block attacks.