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Neptear (ネプティア) is a figure of Neptune and Nepgear was Fusion. So to speak I indicates that the ultimate body of the goddess of Planetune.
About
Figure was the Fusion Neptune and Nepgear. Is one of the secondary creation, it is not official.
Coalescence of Neptune and serious Nepgear blur responsible meaning imagination difficult there. It's goddess state cool it can be said that (Purple Heart) + serious (Purple Sister) strongest rating even so in the goddess of individualistic set, seems to be.