Gōsuke Guden

 (具殿 轟介) is a worker at Gama Gama Aquarium who later transfers to Tingarla Aquarium after the closure of Gama Gama.

Biography
Gosuke is part of the Gama Gama Aquarium Staff who was previously on leave due to lumbago and returned to work shortly after Fūka Miyazawa was hired.

Trivia

 * He has an interest for idols, thus able to recognize Fuuka.
 * He enjoys Shochu Ice Cream.