The Domino City Aquarium worker is an unnamed character who appears in the Yu-Gi-Oh! second series anime. She is a worker at Domino City Aquarium, and the trainer of the killer whale show.


The aquarium worker came upon Mako Tsunami in the killer whale's tank 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.

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