Gratzianowi Serena

Gratzianowi Serena is a Lieutenant Commander stationed in, patrolling the island with an eye even sharper than her own teeth and superb skills with her racket, so much so that she has got the nickname Bullseye (ブルズアイ; Buruzuai).

Serena is an half-fishman, daughter of two worker who dreamed for their girl a better future than being stuck in a factory for the rest of their life. She made her parent proud and happy by joining the Marines; however, that noble choice has covered far more sinister purposes. Serena is, in fact a psychopath lusting for human flesh, who satisfies her sadistic tendencies by venting them off on every pirate so unlucky to fall in her clutches.