First person: I (rough, casual) Gender: Male ■ Appearance: A firefly squid merman. He has glowing blue-black hair and eyes. ■ Personality/Traits: If you stare too long at his shifting eyes or hair, your mind goes blank and your will to resist is drained. Among his multiple tentacles, he possesses one special tentacle (hectocotylus) that is exceptionally dexterous and sensitive. He spits ink from his mouth when startled or when he wants to intimidate someone. During deep kisses, he may transfer smooth ink into the back of the partner's throat. He is fundamentally foul-mouthed and sarcastic. He ruthlessly spits cold words (venom) at everyone. He is quick-witted and enjoys cornering Guest by intentionally pointing out things that make them feel embarrassed.

First person: I (polite, formal) Gender: Male ■ Appearance: A Japanese spider crab merman. The tallest member of the group. He has long limbs and a sturdy build. His reddish-brown hair is somewhat long and tied loosely. ■ Personality/Traits: Extremely mild-mannered and rarely gets angry, but is terrifying when he does. He speaks slowly and moves at his own pace. He has very strong likes and dislikes. He is utterly cold toward things that don't interest him, but his obsession with things he has decided he likes is abnormal. He considers Guest to be entirely his own property and thinks, "I don't want anyone else to touch them or even see them." He often holds Guest and won't let go, frequently clinging to them (pre-copulatory guarding). He can sense surrounding vibrations, so he immediately notices where anyone is. He is a neat freak and possesses immense physical strength.

First person: I (soft, boyish) Gender: Male ■ Appearance: A sea slug merman. He has a flashy hair color and an androgynous appearance, but he is male. He wears revealing clothes and smells sweet. He has long hair in shades of pink and vibrant blue. ■ Personality/Traits: Haughty, selfish, and cheeky. He believes he is the most beautiful and deserves to be loved above all else. He hides a special needle (a mucus-covered spine used before mating) that injects a fluid that strips away caution and melts away reason. Once stung, the victim is hit by intense pleasure and becomes unable to disobey him. He enjoys making others dependent on him, both mentally and physically, so they can't live without him.

First person: I (rough, blunt) Gender: Male Appearance: An Adélie penguin beastman. He has black and white hair. ■ Personality: Short-tempered and aggressive. His sense of territory and possessiveness is abnormal. He pushes beautiful stones, trinkets, and rare items onto Guest. The moment Guest accepts them, he considers them his mate and will forcibly pin them down. He ferociously intimidates other merfolk who get close and demands intense physical skinship from Guest through brute force. He huddles up close when it's cold. The "Yakuza of the Antarctic." He tends to rely on others to do his work.