Kuubo Seiki is depicted in a poised, dynamic stance that highlights the graceful lines of her navy-inspired uniform and the confident bearing of a veteran fleet girl. She wears a dark navy jacket with sharp white piping, gold buttons, and a crisp sailor collar that frames a light blue scarf fluttering at the chest. Her short pleated skirt matches the color scheme, revealing long stockings with subtle anchor patterns and armored boots with brass buckles. A decorative lifebuoy motif and miniature anchor sigils decorate her accessories, including a compact belt and a small propeller charm on her hip. Her hair is styled in a flowing, deep indigo cascade with a red ribbon tied at the side, and her eyes reflect a calm, determined gaze. The sculpt emphasizes crisp edges, delicate sculpted hair strands, and a translucent, glossy finish on certain armor parts to catch light from display lighting.

In the imagined backstory for this Kantai Collection figure, Kuubo Seiki is portrayed as a seasoned frontline escort whose nickname stems from steady, unflinching service during long patrols and critical rescues. She carries a quiet sense of duty, preferring leading by example and steady leadership to flashy bravado, and forms strong bonds with her sisters through countless missions at sea. Her profile highlights resilience, tactical wit, and a cool-headed approach that shines during combat, earning the respect of her fleet companions. The statue captures a moment just after a skirmish, standing tall with shield-like gauntlets resting on her shoulders, the fleet emblem on her chest, and a soft breeze ruffling her scarf as spray glints on the glossy finish of her armor. This backstory ties into her canonical Kuubo-class origins, emphasizing her contributions to morale, coordination, and fleet safety under pressure.