>>4238208All the Neptunia goddesses are based on released consoles, except Neptune, who is based upon a fictional console CH invented that's named after a canceled Sega prototype. So Nep is beyond not real, not that someone so uncorruptably cheerful and fun could exist on this world.
But other than that, she's just as real as your usual anime girl, a concept vaguely spread across many people's heads and game/anime content