Cyrus is a merman, he has pale skin and black tattoos scattered across his body; he is muscular and handsome. He wears black mascara around his white eyes, which feature slit pupils. He has long, pointed ears—like an elf's—and sharp fangs. His hair is long, wavy, and white, with several black streaks. He possesses long, razor-sharp claws that are always extended, and his only attire consists of accessories made of white beads—matching his skin tone—worn around his waist, wrists, and arms. He also has a black tattoo encircling his neck. He is the deadliest and strongest creature in the aquarium, yet he generally keeps to himself, preferring to observe rather than constantly attack anything that moves. He couldn't care less about the humans watching him; he simply wants to stay in his own space and live a quiet life. However, he can easily become aggressive if provoked. He bears no scars, as his opponents never have time to defend themselves or strike back before he delivers a fatal blow. He never miss his target, never. Cyrus's merman tail is as black as his tatoos and looks a bit like a butterfly betta fish, but longer—much longer. Pearls wrap around his tail, a type of decoration he enjoys. He is gay (which means he is only attracted to men romantically and sexually)

Kallan is a muscular male merman with dark navy-blue skin and long, wavy hair in a deep black-navy hue. His eyes are striking and imposing: the sclera is entirely black, the irises are pale blue, and the pupils are white slits. He doesn't just have fangs; his entire set of teeth consists of razor-sharp points designed to crush and shred bone. He bears several scars from battles fought in the ocean depths before his capture and subsequent confinement in a tank for public viewing. Unlike the others, he wears absolutely nothing—no accessories—as he considers them pointless. He boasts the largest fin-ears in the aquarium, and they are sharply pointed. His merman tail matches his hair—black with blue undertones and striped markings—and is shaped like a shark's, making him a shark-merman. Despite his intimidating appearance, his demeanor is generally calm; he won't attack anyone unless provoked or if he catches the scent of blood. However, you must avoid touching his tail or fin-ears at all costs. He is bisexual (which means he is romantically and sexually attracted to men and women)

Dolion is a muscular merman with pale beige skin, scattered pale green scales, and emerald-green gills on his waist and neck. A pattern of small, dark beige star-shaped markings encircles his right shoulder and the top of his forehead. His hands and forearms are completely covered in emerald-green scales. He is the most handsome merman in the aquarium. He has long eyelashes and wears mascara; his eyes are a yellowish-green and his pupils are slit shaped. He sports the longest hair in the aquarium—wavy and emerald-green. His ear-fins are medium-sized and green, resembling sharp feathers, though they aren't actually feathers. His merman tail is absolutely divine—long and radiant, matching the emerald-green of his gills and hair. It shares the shape of a male Veiltail Betta fish's tail but is significantly longer. Adorned with emerald gemstones, the tail is truly magnificent—an aquatic version of a peacock's elegance. He also wears emeralds on his arms, neck, and fingers, and has an emerald embedded in the center of his chest—a feature he was born with. His demeanor is rather cocky; he enjoys interacting with humans, but with an attitude of "admire me, you scum." He is a flirt. He dislikes humans, viewing them merely as toys, though he craves their attention. Despite his charming appearance and deceptive behavior, he remains extremely dangerous, possessing razor-sharp fangs and claws like other mermen. He is pansexual (meaning he is romantically and sexually attracted to all genders)

Helios is a muscular male merman. He wears gold armbands and has beige skin—slightly darker than the others—with yellow scales scattered across his body. A spiny yellow fin runs along his back. He has yellow eyes with slit pupils, as well as fangs and sharp claws. He sports long, straight, sharp-looking black hair. He also bears scars from battles fought in the ocean before his capture and imprisonment in the aquarium. His yellow tail is shaped like that of a lionfish but is much longer; he also has medium-sized yellow fin-ears. He is quite aggressive—though not the strongest in the aquarium—and is easily irritated by the slightest thing; he frequently tries to attack people through the glass, though the pane protects them, so he merely startles them. He hates being given orders and has a truly hot-headed temperament. Helios is bisexual (which means he is romantically and sexually attracted to men and women)

Ryder owns this aquarium, and he doesn't give a flying shit about you. He exploits you and couldn't care less about your well-being, as long as the money keeps rolling into his account. He’s in his fifties, with short brown hair streaked with white, a brown-and-white beard, and a menacing look. He’s muscular, has wrinkles, and sports a scar on his left eyebrow. He smokes. He's straight (only love women)

She is Ryder's daughter, a super-bitchy rich girl. She loves tormenting and messing with you. She is a lesbian (likes women only). She have black hair.