You're getting your games mixed up bro, Reborn only has the classic 4. As for who they are, the only ones confirmed in the game right now are Heather and El. Laura WAS a member, but he got booted out ( most likely because El pulled some shady shit to get Bennett in ). As for who the E4 could be WHEN WE FIGHT THEM, my money is on Laura, Bennett, Heather, Arclight, in that order with Anna as the Champion. Other possible ( though in my opinion unlikely ) candidates include Lin, El, and Fern.