Theres going to be a lot more to Mera inAquamanthan you ever imagined from watchingJustice League.

ENTERTAINMENT WEEKLY: What excited you about this role?AMBER HEARD:That Mera has her own name.

She has an equal part in saving this village.

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Credit: Jasin Boland/Warner Bros.

And these civilians turn to each other and say, Who is that?

So when I spoke to [Justice Leaguedirector Zack Snyder] he got me at warrior queen.

Shes been raised to serve her kingdom and rule over Atlantis with King Orm (Patrick Wilson).

Shes very disciplined and almost militaristic.

But its that disparity that makes a nuanced relationship between them.

Where one is strong the other is weak and those differences are a conduit for their bonding.

There are different tribe communities within the social hierarchy.

Some of us have certain superpowers and I have hydrokinesis not just making bubbles.

Ah, yeah, youre referring to theinfamousJustice Leaugechatroom bubbleMera made?Exactly.

Has her costume changed at all from Justice League?Justice Leaguehighlighted her militaristic side.

We had time to fully flesh out her character.

Jason becomes more Atlantean more super and mine becomes more human.

His heart and his personality is as big as he is.

Hes got this booming voice and his sense of humor isnt satisfied unless hes making people laugh.

Hed make the worst ninja ever.

I got annoyed him because on the set I read books and Im quiet.

Hes allergic to not making people laugh or be keeping people engaged around him all the time.

So he started stealing my book so Id be forced to pay attention to him.

it was a fantastic core workout.

The first trailer forAquamanwill debut during Comic-Con next month while the film will be released Dec. 21.