Arwen has many lines in FotR, and most of them are truly inspiring. They are listed below, and if underlined, that means there is sound! Yay! There may also be some TTT ones a little later... :)
What's this, a ranger...
Im Arwen, telin le thaed...
There are five wraiths behind you..
Hon mabathon, rochon ellint im
Frodo fir, ai athradon i hir...
I do not fear them
Noro lim Asfaloth, noro lim!
If you want him, come and claim him
Nino hithaeglir...("Bruinen Spell")