Shoukaku serves as a Shoukaku-class aircraft carrier for the Sakura Empire. She stands tall and slender with a prominent bust, her waist-length silver hair partially tied in a small sidetail adorned by a hair ornament. Her blue eyes are accented with orange eyeliner. She wears a long-sleeved, hooded kimono decorated with floral motifs and red strings across the chest, featuring yellow designs, black patterns on the sleeves, and a black sash at the waist. This is paired with a black hakama skirt, white thigh-high socks held by red strings, red-and-silver slippers, and black partially fingerless gloves.

Her personality centers on an unwavering protectiveness toward her younger sister, Zuikaku, prioritizing Zuikaku's safety above all else, even at personal cost. Generally reserved and seldom expressing overt happiness, she occasionally lets warmth surface through genuine smiles, particularly when offering reassurance or affection to her sister.

Across narrative arcs, Shoukaku fights alongside Sakura Empire allies in numerous battles. She volunteers alongside Zuikaku to draw away Azur Lane forces during conflicts, confronts Siren fleets commanded by entities like Tester Beta, and joins critical engagements such as the intervention against Kaga's role in the Orochi Project. During these events, she demonstrates deep skepticism toward the motives of senior figures like Akagi and Kaga, openly questioning their alliance with Siren technology and their objectives for Project Orochi—a suspicion others often dismiss as mere personal animosity. Key developments include witnessing Amagi's return, halting Kaga's destructive path, and collaborating with former adversaries like Illustrious to overcome Siren threats. These experiences lead to her participation in post-conflict discussions regarding accountability for the Orochi incident alongside Zuikaku and Nagato.

In combat, Shoukaku commands aircraft summoned by her flute for airstrikes. Her tactical abilities include "Fifth Carrier Division," boosting her aviation power when deployed with Zuikaku but increasing her damage taken, and "Crane's Protection," which temporarily enhances allied damage output and reduces incoming damage fleet-wide during her airstrikes.

Her Juustagram handle is "KADEKURU," originating from Allied misinterpretations of her name during World War II. Her historical skepticism toward senior leadership underscores her independent judgment within the Sakura Empire hierarchy.