Character biographies for Aragorn and Arwen have been posted at the Lord of the Rings Online: Shadows of Angmar Official site.
Aragorn
Tall, strong, and wise beyond the years shown on his face, Strider is a master tracker, hunter, and woodsman. He knows much about the healing arts, and is a valuable source of information about the medicinal properties of plants throughout Middle-earth. Do not be surprised, however, if he does not give away many of his secrets. Strider is not quick to share more than necessary, especially with those he does not know and trust.
Arwen
Born of immortal blood but doomed to live a mortal life, Arwen Evenstar, only daughter of Elrond Halfelven, is reputed to bear the likeness of her great-great-grandmother, Lúthien Tinúviel, the most beautiful woman to dwell in Arda. Like Lúthien before her, Arwen has chosen to give up her immortality for the love of a mortal Man, Aragorn, son of Arathorn, rightful heir to the thrones of both Arnor and Gondor. But their wedding is not assured, for her father has forbidden that any Man would marry his daughter, unless he takes the thrones of both kingdoms.
Read more about Aragorn here.
Read more about Arwen here.
