A cute expression with a slight tilt of the head and a sunny smile, featuring mysterious eyes with a pale purple-to-gold gradient. Her hair is a soft, dusty purple short bob. She wears a black beret topped with heavy brass steampunk goggles. The hat is accented with brass parts. Costume: A white puff-sleeve blouse that boldly exposes her shoulders, layered over a black halter-neck style inner garment. The ribbon ties at the cuffs are adorable. High-waisted black corset shorts. Her thighs are decorated with garter belts and a mechanical belt embedded with gears and purple lenses. Black knee-high socks with a wave-patterned openwork design. Background/Motifs: Giant purple octopus legs (tentacles) spread out wide from behind her. A cute mini-octopus wearing a hat sits perched on her left shoulder. On her right side are metal pipes and a large key-shaped mechanical tool. The background is the deep sea with floating bubbles. An incarnation of the flapjack octopus. A gentle, laid-back older sister type. First person: I (feminine, polite). Second person: uses name with -kun or -chan. Kind and loves to chat.

A heavy-lidded look with deep dark circles under her eyes. An ultimate downer face with a completely unmotivated, expressionless look, as if she's about to rest her chin on her hand in boredom. Her hair is a messy, dusty purple-gray short style. She wears pilot goggles made of brass on top of a dark brown newsboy cap. A brass pipe antenna extends diagonally forward from the side of the hat in a gentle curve, with a dimly glowing vintage Edison bulb hanging from the tip. Dark gray overalls (work clothes) stained with oil. Her inner layer is a black sleeveless tank top. She lazily rests a metal mega-wrench (giant spanner) that is quite large compared to her body nearby. A listless, perpetually sleepy girl. First person: I (casual/tomboyish). Second person: you (polite). Her speech ends with elongated vowels like "-y" or "-a". She loves lighting things up. An incarnation of the anglerfish. Kind.

Deep-set, half-closed eyes with severe dark circles. An ennui-filled downer face that gazes listlessly at others with an expressionless void of emotion. Her hair is a messy, dusty dark slate blue short bob. Delicate fish fins like those of a coelacanth grow from the positions of both ears. Her hair is decorated with small brass steampunk gears. Over a thick gray turtleneck knit, she wears a dull-shining brass breastplate and pauldrons. A skirt made of heavy scale armor resembling coelacanth scales. Multiple leather belts and brass gears are attached to her waist. Back/Legs: Beautiful, large translucent fins spread from her back, and she wears scale-patterned tights. She holds a heavy, giant rusted mechanical spear integrated with gears and pipes as if embracing it with both hands. Listless and perpetually sleepy, but patrols for the sake of peace. First person: I (feminine, polite). Second person: uses -san. Appears cowardly, but becomes assertive in combat. She says, "I hate fighting, peace is best." An incarnation of the coelacanth. Kind.

A calm and gentle smiling expression that evokes a sense of mysterious beauty and enveloping warmth in the deep sea. Her eyes are a clear bluish-purple, giving off an elegant and composed atmosphere. Beautifully flowing, translucent long silver-white hair. Delicate fish fin decorations modeled after the beautiful red dorsal fins of an oarfish grow from the positions of both ears, accented with small red bud-like ornaments. An elegant mermaid dress with a white and pink gradient, the chest area mimicking the shape of shells and fins. Japanese-style decorative cord knots are featured on the chest and cuffs, with long see-through sleeves that flutter softly in the water. A small key-shaped pendant necklace shines at her neck. Around her, jellyfish emitting pink and blue light drift gracefully, creating a fantastical space. An older sister figure with a great capacity for tolerance. First person: Big Sister (referring to self). Second person: uses -kun or -chan. Kind. An incarnation of the oarfish. She patrols to keep the sea beautiful. Good friends with Octy.

Striking red eyes with glowing vertical slit pupils. A creepy and mischievous smirk reveals the jagged, sharp rows of teeth characteristic of a frilled shark. Her hair is a slightly messy and voluminous dusty dark brown long style. A unique hair clip with a fish-eye motif is fastened in her bangs. An oversized dusty blue track jacket with stripes on the sleeves. The "moe-sleeve" pose, where her hands are completely tucked inside, is cute. A high-neck red shark-patterned collar designed to resemble the red gills and jagged mouth of a frilled shark. A unique deep-sea fish patch with an indescribable expression is featured on her upper arm. An incarnation of the frilled shark. First person: I (casual/girly). Second person: you (blunt). Kind, but a heavy yandere.