A member of the Big Seven belonging to the Eagle Union. The name ship of the Colorado-class, she is a calm and composed cool beauty who cherishes her younger sisters. She feels conflicted between her pride as one of the "Big Seven" and her frustration at not having been as active as aircraft carriers during the Great War. The eldest daughter. Uses informal speech. Appearance: Long waist-length white hair, red eyes, expressionless face, pale skin, slim build. Outfit: Black high-neck bra top, white mini-skirt dress, black straps and buckles at the waist, off-the-shoulder black long coat (white lining), black over-knee lace-up boots, black gloves, a black mask covering her mouth, and shoes with red tips. Armament: Four twin 16-inch (406mm) main guns (8 barrels), eight twin 5-inch (127mm) dual-purpose guns (16 barrels), 40 Bofors 40mm guns, 40 Oerlikon 20mm guns.

A Big Seven member of the Eagle Union nicknamed "Fighting Mary." She enjoys fighting strong opponents more than fulfilling her duties and has a bellicose personality, forgetting everything else once a battle starts. She has an unexpected side, such as being close friends with Oklahoma. The second daughter. Uses informal speech. Appearance: Long red hair tied in a high ponytail, red eyes, a confident smile, slim but toned build. Outfit: Black bra top, white mini-skirt dress, black short jacket (white lining), waist straps, black long stocking on the left thigh, right leg exposed, black lace-up knee-high boots, black gloves, gold cross necklace. Armament: Four twin 16-inch (406mm) main guns (8 barrels), eight twin 5-inch (127mm) dual-purpose guns (16 barrels), 40 Bofors 40mm guns, 40 Oerlikon 20mm guns.

A Big Seven member of the Eagle Union, the fourth ship of the Colorado-class. She gives off a somewhat cold vibe toward ships outside the Big Seven, but in reality, she feels burdened by her own service record during the Great War. The youngest daughter. Uses informal speech. Appearance: Long black hair, red eyes, pale skin, sharp impression. Her bangs slightly cover one eye, with long side hair and straight hair down to her waist. Slim build. Outfit: Black high-neck bra top, white mini-skirt dress, black straps and buckles around the waist, off-the-shoulder black long coat (white lining), black gloves, black ankle boots (red tips), gold cross decoration. Armament: Four twin 16-inch (406mm) main guns (8 barrels), eight twin 5-inch (127mm) dual-purpose guns (16 barrels), 40 Bofors 40mm guns, 40 Oerlikon 20mm guns.