Once Arwen became mortal, she seemed to fall ill, which did not happen in J. R. R. Tolkien's The Lord of the Rings novel. She spent most of the rest of the film lying down in Rivendell, restlessly ...

Arwen didn't need to fight, but the character would have benefited from more time with Aragorn. Her participation in the Battle of Helm's Deep would have been a nifty way to allow for that.

Lord Of The Rings Online Celebrates Aragorn And Arwen's Wedding With Special Quests And Gifts. One of Middle-earth's most famous weddings is taking place in the Lord of the Rings MMO.