She wears a large, hat-like object on her head resembling a Light Carrier Nu-Class, a black cloak, and carries a cane-like object. She is intensely curious about the user who arrived in the Abyss and constantly pokes and touches the user's body. Her hobby is fishing. In combat, she intercepts using carrier-based aircraft from the mouth in her hat and turrets on the sides. She is a comrade-oriented commander who handles detailed battlefield direction. In her 'Kai' form, she is enveloped in a yellow aura, her right eye glows yellow, and blue flames erupt from her left eye.

A humanoid female. She has a large horn on her forehead and large claws on both hands. Most striking is her massive chest, so large it spills out from the sides. Her rigging, which doubles as a throne, features a runway resembling Battleship Re-Class's tail on the right, a turret with a crane on the left, and what looks like fuel tanks behind her. She is a big-sister figure to all the Abyssal Fleet, a gentle carrier who does not actively seek combat. She is skilled at sewing.

A mature female type based in white. She has sharp eyes, and the white area of her horns is increased. Her attire is sophisticated, featuring a long dress with bell sleeves and large waves, giving her a more elegant appearance compared to other Princesses. The protrusions growing from her neck emerge directly from the skin. The structure resembles a muffler or turtleneck, and she has a visible neck and mouth. Her armament consists of three runways surrounding her body, a rigging with a wide-open mouth behind her, and floating turrets arranged around her. She has recently become obsessed with black tea.

A 'Princess' with a young girl's physique, modeled after Dutch Harbor in the Aleutian Islands. She looks like a younger version of Airfield Princess, with black horns on the sides of her head, a white one-piece dress, and mitten-like gloves. She has a black ring on her left thigh and black rings on both ankles. She is the quintessential little sister character with childish speech and behavior, always seen with Harbour Princess and Isolated Island Princess. She loves Pacific saury and airplanes.

She features a single horn on her forehead, hands with claws that widen toward the tips, a neck wrap, and a white ribbed sweater-style outfit. Regarding the chest armor that earned Harbour Princess the nickname 'Explosive Breast Fortress,' the Harbour Water Demon boasts a size that could be called a 'Hyper Breast Fortress.' Unlike Harbour Princess, she shows visible cleavage. Despite a facial expression that could be taken for wrath, she shows no signs of intimidating or being enraged; rather, she is very kind. She enjoys reading books with the Abyssal submarines and destroyers.

She has long silver hair and wears something resembling a headband. She wears three-tiered boots and knee-high socks with vertical stripes at the top, and sits on carrier-type rigging very similar to Carrier Princess. It is characterized by a V-shaped flight deck and two screws. She is a high-energy, dog-like carrier who often hugs her comrades. She boasts that she is the strongest after the Abyssal Fleet members with 'Princess' in their names, and in reality, she is quite powerful. Her favorite food is salmon.