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Uni's name is taken directly from the "Uni" in "Universal Media Disk", the type of disc used specifically by the PlayStation Portable.
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Ram and Rom's characters are influenced by Nintendo's Ice Climbers (Nana and Popo), based on the colors.
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5pb. is named after a Japanese music and game manufacturing company, with her headphones being based on the company's logo. Her Japanese voice actress, Nao, is a musician under 5pb.'s record label, as well as the singer for "Ryuusei no Bifrost", the opening theme to the original Hyperdimension Neptunia.
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Several of Gust's attacks feature characters from the Atelier series.
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5pb's special attacks feature characters from Steins;Gate.
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After winning a battle, there is a chace that Neptune will sing the victory theme from Final Fantasy.
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