—Adult NeptuneNeptune (ネプテューヌ?) is a grown up version of the series' main character, Neptune. Unlike the original Neptune, this version is a normal human. She comes from the Ultradimension, and traveled to the Zero Dimension
She's a different person from the protagonist Neptune but her personality is the same. She travels to different dimensions while carrying "Nep's Note" in her hand.
Adult Neptune's appearance is more or less highly the same as the main Neptune's. She has long lilac hair with bangs that reach down to her collar bone and purple eyes. In her hair she wears black hair-clips in the shape of D-pads and around her neck is a choker that has a light blue D-pad symbol on it. She wears a mostly black one-piece parka dress that has a purple hood, strings that look like controller plugs, and two huge black and purple pockets with blue circles on them.
The sleeves have two light blue stripes going all the way down while the front of the parka only contains one. The ends of the sleeves and the bottom of the parka have black and purple stripes. The zipper emblem and the back of the parka has a purple letter "N" to represent the first letter of her name. Unlike the other Neptune, she does not wear thigh-high socks and her shoes are black and purple. Another thing to note is the fact she wears a black and purple gun holster on her left thigh that matches the rest of her outfit.
While her body has grown, it doesn't look her way of thinking hasn't changed, being as innocent and simple-minded as before. Her general personality is somewhere between that of the original Neptune's childlike attitude and Purple Heart's adult attitude. According to Rie Tanaka, Adult Neptune acts more like a high school teenager.
- The gun that Adult Neptune uses in combat is the same gun that Neptune uses for her ranged attacks in Hyperdimension Neptunia.
- In the official website of Shin Jigen Game Neptune Victory II, it tells how Neptune seeks unusual insects. One part that shows that Adult Neptune is the Neptune in the True Ending in Hyperdimension Neptunia Victory is that she caught Croire whom she thought was a bug.
- Neptune_(Zero_Dimension) on the Heroes wiki.
- Neptune/Ultra_Dimension on the Hyperdimension Neptunia wiki.