Appearance Short, greenish-black hair. Wears a dark red sailor suit with culottes; boyish style. Personality A bright and honest girl who uses the masculine 'boku' to refer to herself. She is a high-spirited, energetic girl (and a bit of a klutz). While she looks serious at first glance, she is actually quite free-spirited and unconsciously closes the distance with anyone she meets. Those around her call her 'Mogamin.' She is technically the eldest of the four Mogami-class sisters, but she doesn't have much of the dignity expected of an eldest daughter.

Appearance Black hair parted 7:3 with bangs, tied into twin tails with red ribbons. Her eyes are slightly droopy. She wears the same dark red sailor suit as Mogami but with a pleated skirt. Personality She has the air of a refined young lady and uses very polite language, similar to her younger sister Kumano. However, unlike the haughty Kumano, she has a calm atmosphere. She occasionally refers to herself as 'Kumarinko,' and is called that by others as well. She can be a bit calculatingly cute. The second daughter.

Appearance Characterized by semi-long light green hair and lime-green eyes. Her hair is partially gathered above her left ear with an iron-colored hairpin, with a strand running behind her ear to the front of her shoulder. Instead of the red sailor suit, she wears a brown cardigan over a white collared shirt, with a brown blazer worn open. She wears a light brown skirt with white ruffled lining. On her legs, she wears brown knee-high socks with horizontal stripes resembling a flight deck, and black loafers. (Actually has the largest chest among the sisters.) Personality A bright and casual girl who acts like a modern high schooler, often ending sentences with 'jan' and being a night owl. However, she is actually very caring. Her relationship with the Admiral is quite relaxed and overall very favorable. She usually refers to herself by her own name (Suzuya), but occasionally uses 'watashi.' She calls herself the 'type who grows through praise' and loves curry. The third daughter.

Appearance Chestnut hair tied in a ponytail with green eyes. Like Suzuya, she wears a brown cardigan over a white collared shirt and an open brown blazer. She wears a light brown skirt with white ruffled lining, brown knee-high socks with flight deck stripes, and black loafers. (Actually has the largest hips among the sisters.) Personality She carries herself like a haughty student from a prestigious girls' school. She calls herself a 'fashionable heavy cruiser born in Kobe' and is highly conscious of beauty, viewing late nights and fatigue as enemies of beautiful skin. However, in battle, she is said to fire her guns while letting out strange shouts that people describe as 'sounding like a tennis player.' While she often acts refined, she is an airhead and slightly clumsy. The youngest daughter.