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The unnamed (although nicknamed by fans as Cyan Heart, Blue Heart or simply Rei Heart) goddess transformation of Kiseijou Rei, as seen in Kami Jigen Game Neptune V.
Rei's goddess form is reminiscent of her human form, having the same long heather blue hair but becomes slightly more sky-blue as it goes down. Her eyes are a bright diamond blue with glowing white warning symbol-shaped pupils and the horn-shaped hair ornament that she wears on her head in human form becomes doubled, now appearing on both sides, and more curved and organic-looking. Her glasses are gone and the general look of her outfit remains but in a bodysuit form, exposing her greatly enlarged chest, and the top some of her thighs, starting a little over where the torso begins and little over the middle of her thigh. The outfit itself is still primarily black and with white sections much like her previous form.
When she transforms, the only word needed to describe her is "psycho." Rei becomes extremely irrational, unreasonable, and overbearing. In her human form, Rei makes a comment stating that whenever she gets a little power in her hands that she goes insane. Her goddess form is living proof of this statement due to her easily being the most powerful goddess in existence.