[Kiryu]

I've done this as a roleplay before, but the best I can come up with is a Demon themed sentai series, were the main heroes uses the same powers as the enemies they're fighting, slowly but surely becoming demons themselves.

The main enemies would've been the previous team they replaced, who already succumbed to demon possession. I suck at naming, but the main colours were:
Red
Blue
Violet
Black
Gold
White

Name still needs work, cause I kinda suck at naming...