Uh... that's the first time I've heard anything like that. o_O
There's three games in the Aisaiga series. Hikari wasn't in the first one at all, her corrupt form in the second game (Powered) is just a black palette swap of her regular costume, and the third game (Flash) has villains based off of Asian mythology and uses the whole evil bellydancer / Asian deity / Sexy Mandarin motif for the girls' corrupt forms.
edit: waaait, are you talking about this girl from the second game?
http://g.e-hentai.org/s/08802a8ed9/36151-318
http://g.e-hentai.org/s/ff7fc712fa/36151-320
I didn't know that supposed to be Hikari. I just figured it was a random villain with a similar character design.
The promo site has her bio grouped in with the rest of the villains in that game.