"The prob with EC3 was I never got a chance to create a full design before Joe told me SOJ wanted it dead. So I never did full designs for the Infernals. The concept was they were the person who caused the death, not the killer, but made the call to kill that Eternal. In Shadow's case it was the CEO of Black Orchard Corp, For Larcen it was stc.wikia.com/wiki/Mr_Tagliani The other's can be guessed from their stories in the game. As for 8th form I did remember, it's entropy. That's about all I can help give you as details."
Chaos EC's form order
Fire> Earth> Metal> Wood> Water>Light>Entrophy >Emptiness
As for Chaos EC's forms, my memory's a little sketchy however I did ask Mike and he told me to look at the chinese elements for the first 5. As for the Emptiness form, I remember that one. For Light I'm not sure, it might be Power form. I'd have to ask again. So it's either Light or power. as for Entrophy, it's the law of randomization. I don't need to tell you why that's chaotic.
I'll edit the post if I get mike's answer regarding the Light/Power form debate.
until then, ciao