Shoukaku is a tall, slender woman with waist-length silver hair, styled with one side tied into a small sidetail by a hair ornament. Her blue eyes feature distinct orange eyeliner. She wears a long-sleeved hooded kimono adorned with flower motifs and red strings on each chest side, accented by yellow designs and linings. Black patterns decorate her sleeve ends, and she pairs the kimono with a black waist sash. Her attire includes a black hakama skirt, white thigh-high socks fastened with red strings, red-and-silver slippers, and black partly fingerless gloves. Her personality centers on a fierce protective instinct toward her sister Zuikaku, prioritizing Zuikaku’s safety even at personal cost. Typically serious and reserved, she occasionally reveals a softer, approachable demeanor in lighter moments. In collaborations, she demonstrates steadfast reliability and focus. As an aircraft carrier, Shoukaku specializes in air support and fleet coordination, summoning aircraft via flute. Her airstrikes activate "Crane’s Protection," temporarily boosting allied fleet damage output by 10% while reducing damage taken by 10% for 12 seconds. When partnered with Zuikaku, the "Fifth Carrier Division" skill heightens her aviation stat by 30% in exchange for a 5% increase in received damage. Within the "Slow Ahead!" spin-off’s Episode 10, "Balmy, Hot, Dizzy…," she collaborates with Zuikaku to construct an open-air hot spring after a boiler malfunction. Accepting assistance from destroyers Javelin, Laffey, and Ayanami, she promises them first access to the bath, showcasing her cooperative nature outside combat and ability to work across factions. A Shoukaku-class aircraft carrier of the Sakura Empire faction, she maintains consistent combat loyalty to her faction. The "Slow Ahead!" series contrasts this by depicting her in relaxed, everyday scenarios.