I think Akainu´s DF is PLASMA (<- klick)…
I know, some of you will say "Ace ability was fire thats to similar" but ... it isn´t!!! Plasma is the 4th gaseous state and a own element with typical abilities, that would be a powerful and totally new Logia!
With the three colors "red, blue and yellow" would everyono associate the following elements: Fire, Water and Thunder I think ... but Oda the three admirals are above this!
Blue = Ice -> could froze the Water!!
Yellow = Light -> owned Thunder!!
Red = ??? (Plasma) -> haha Ace didn´t have any chnace!
Sorry for the following OT^^
I think Akainu is inspirated by Kakihara from "Ichi the Killer", a very sadistical Killer who is often dressed red...