The '''Domino City Aquarium worker''' is an unnamed character who appears in the [[Yu-Gi-Oh! (second series anime)|''Yu-Gi-Oh!'' second series anime]]. She is a worker at [[Domino City Aquarium]] , and the trainer of the [[wikipedia:Killer whale|killer whale]] show.

 The aquarium worker came upon [[Mako Tsunami]] in the killer whale's tank after while he was attempting to fish in it. She angrily berated him, before collapsing due to illness. ; Mako caught her and discovered that she was feverish. She insisted that she had to perform with the whale in the upcoming show, but Mako volunteered to take her place.