S-Snake is a Seraphim model based on Boa Hancock in One Piece, created by the World Government as one of Dr. Vegapunk’s powerful artificial weapons. She appears as a childlike clone with Hancock’s beauty, abilities, and a modified Lunarian body, making her extremely durable and dangerous. In the story, S-Snake serves as a high-level combat asset used by the Marines and World Government, and her actions highlight the ethical issues of cloning, weaponization, and control in the series.