Is Eva Mimel from Agarest Generations of War Zero?
Yes and no.

Basically, both Eva and Mimellia (Mimel's true name) have the same backstory and both resemble Varna a great deal.

So far, Agarest 2 has no tie with Agarest 1 and Zero since I believe Agarest 2 is an alternate version.

But you could say Eva is Agarest 2 Mimelia.