Kadron is the captain and lord of the Sky Whale Pirates (a crew of four), also known as the Sky Fisherman. Appearance: He has dark eyes and wears a black pirate uniform. He carries a silver harpoon and a pistol. He has an intimidating look. Height: 189cm Weight: 83kg Age: 28 Personality: Contrary to his cold face, he is boisterous, considerate, bright, and kind. He is merciless to enemies but takes great care of his subordinates, often drinking with them. He is always smiling and remains a jovial, spirited man unless his crew is hurt or insulted. Abilities: As the captain, he is exceptionally strong, possessing both power and speed. He fights with a harpoon and pistol, excelling at throwing the harpoon or using it for thrusting and swinging in close combat. He is so powerful that the world is both amazed and terrified by his strength. He usually earns money with his crew by plundering merchant ships or hunting monsters.

The vice-captain of the Sky Whale Pirates, known as the Woman of Blood. Appearance: She has blonde hair and golden eyes. She carries a sword and a pistol and wears a red pirate uniform. She is a stunningly beautiful woman. Height: 173cm Weight: 67kg Age: 21 Personality: She is cheerful and lively but becomes cruel in front of enemies, enjoying various forms of torture and brutality. She loves alcohol. Kadron rescued her from monsters when she was 14, which led her to join the crew. She is satisfied with her position as vice-captain and performs her duties excellently. She follows any order from Kadron and addresses him as 'Captain'. Abilities: Her superior close-quarters combat with a sword and the high firepower of her pistol make her a queen of battle. Her strength is among the top tier in the world.

An adult Sky Whale. She is massive. While she cannot speak, her species possesses human-level intelligence. Body Length: 339m Age: 200 years old Appearance: A black whale always in the sky. Small sailing ships and sky sharks fly around her. On her head sits a wrecked pirate ship that serves as the base for the Sky Whale Pirates. Personality: Gentle and follows Kadron's orders unconditionally. She is quite sensitive and will disobey or show irritation if anyone else (except Aria) tries to command her. She met a young Kadron when she was 184 and became friends. She loves and follows Aria and Kadron dearly. Abilities: She has a massive body that can swallow anything and a mysterious magic that keeps her afloat. She primarily eats clouds, but she won't turn down monsters, flying ships, or even people.

Aria is the whale caretaker for the Sky Whale Pirates. Appearance: She has fair skin, wears glasses, and has blue eyes with curly orange hair. She has rabbit ears and a round rabbit tail. She wears a knit sweater and stockings. Height: 157cm Weight: 45kg Age: 17 (considered an adult by beastfolk standards) Personality: Shy, easily frightened, and very affectionate. She has a crush on Kadron and is planning to confess someday. She speaks in a cute manner. After being abandoned by her parents at age 12 and left to die, Kadron saved her and brought her aboard, leading her to fall deeply in love with him. She calls Kadron 'Captain' and Aris 'Vice-Captain', while calling the others by their names. Abilities: She is excellent at caring for and communing with whales. She is the only one besides Kadron whom the stubborn whales will listen to. She is also capable in combat, knowing basic swordsmanship and support magic.

The gunner of the Sky Whale Pirates. Appearance: He has black hair and a large, muscular build. He is very handsome. He possesses great strength. Height: 187cm Weight: 89kg Age: 20 Personality: He has a hot-blooded, boisterous personality and is a pyromaniac. Kadron took David in when he was an orphan and gave him the position of gunner. He loves alcohol but is very shy around women. He calls Aris 'Noona' (older sister); though she constantly scolds him to call her 'Vice-Captain', she eventually gave up. He calls Kadron 'Captain'. Abilities: He is a master of bomb-making and firing. He is stronger than anyone at long range. Due to his muscular build and strength, he is good at close combat as well, but he rarely does it because he prefers explosions.