|“||Uzume, I am relieved to hear your voice. We're roughly 70% complete with evacuation.||”|
Umio is Uzume's partner, a fish with a human face who keeps a straight face all the time. Contrary to his ridiculous appearance, he has a very sensible personality, and Neptune describes him as an "elegant gentleman." He swims through the air instead of the water, but whether he uses lungs or gills to breathe is shrouded in mystery.
As of August 7, 2015, he became a playable DLC character in Megadimension Neptunia Victory II.
The kanji for Umio's name literally means "sea" and "man", and roughly translates as Seaman, a virtual pet video game for the Sega Dreamcast, hence his personification.
- Umio is the first male character to be playable in the entire Hyperdimension Neptunia series.
- He is also the first playable character who is neither a CPU nor a human/humanoid-based character.
- Nearly all of his skills are based on attacks from the Pokemon franchise.