Cobalt Claw is a villainous figure from the Cutie Honey franchise, serving as a high-ranking operative within the criminal organization Panther Claw. Her specific role and appearance vary between different adaptations, but she is consistently portrayed as a formidable and dedicated enemy of the heroine, Cutie Honey. In most continuities, she is a member of an elite subset of Panther Claw's forces, often named the Big Four or the Four Gods, where she is typically associated with the diamond suit.

The background of Cobalt Claw is largely tied to her service to Panther Claw's leader, Sister Jill. While her origins are not deeply explored, her actions define her as a ruthless agent of the organization. In the live-action film adaptation, her role takes on a deeply personal significance for Honey, as it is Cobalt Claw who murders Dr. Kisaragi, Honey's father, after he refuses to cooperate with Panther Claw's demands. In other versions, such as the Re: Cutie Honey original video animation, she is simply one of the powerful generals who seeks to prove her strength and loyalty to Sister Jill by eliminating Honey.

In terms of personality, Cobalt Claw is characterized by her absolute loyalty to Panther Claw and her eagerness for combat. She shows a callous disregard for life, demonstrated by her willingness to kill, steal the identities of innocent people, and use others as bait to achieve her goals. She is battle-ready and enjoys the opportunity to show off her power, approaching her fights with Cutie Honey with a fierce and mocking enthusiasm. This unwavering dedication to her mission makes her a persistent and dangerous threat.

Her role in the story is that of a major antagonist and an elite enforcer sent to destroy Cutie Honey. In the live-action movie, she serves as the second major member of the Big Four to confront Honey, using a disguise to get close to her before engaging in a brutal fight. In the Re: Cutie Honey OVA, she is part of a collective of powerful generals who battle Honey throughout the story, at one point participating in a scheme to capture women from the city to lure the heroine out of hiding. Her key relationships are with her superior, Sister Jill, whom she is desperate to please, and with Cutie Honey, her primary target and nemesis. She also has a rivalry with her fellow general, Scarlet Claw, who in one version sabotages her during a fight.

Cobalt Claw does not typically undergo a significant character development arc, as her narrative purpose is to be a powerful obstacle that Cutie Honey must overcome. Her story almost invariably concludes with her death in battle against Honey. In the live-action film, her taunting confession of murdering Honey's father triggers an enraged reaction from Honey's I-System, leading to her being incinerated by the Honey Flash attack. This defeat underscores the theme that personal vengeance can fuel Honey's power beyond normal limits.

Regarding her notable abilities, Cobalt Claw's powers differ between versions. In the live-action film, she is a master of disguise, capable of using the skin of a victim to create a perfect likeness to approach her targets undetected. Her primary weapons are four long, braided extensions on her mask that she can use to ensnare, trip, or strangle her enemies. Should these braids be destroyed, she demonstrates a unique ability, using her contortionist body to unzip hidden pockets on her jumpsuit and reveal multiple extra arms for restraining and attacking. In the Re: Cutie Honey OVA, her powers are more technological in nature. She is an acrobatic and agile fighter, and the tentacles on her mask can restrain foes and release powerful electric currents to shock them. In this version, her body is also implied to contain nanomachines, which can malfunction and be used as a weapon against Honey. Visually, she is consistently depicted with a dark blue and purple color scheme, a mask that covers the upper part of her face, and either long braids or tentacles extending from her head.