Arwen O'Shay was born in 2590 in Dublin. The youngest member of the Full House team by a decade, her background file is a little sketchy. It is known that her parents, Shaughnessey O'Shay and Kathleen O'Conner were street acrobats and con artists who fell together on a job and stayed that way. Arwen was raised as a part of their act from the time that she could tumble. As a result of this early training, and continued honing after her induction into US training, her agility is almost superhuman.

She grew up streetwise. When she was ten, her parents moved on during the night, leaving the sleeping child. Arwen didn't mind a great deal—-Shaughnessey had apparently begun to look at her with interest, and it was not to Kathleen's liking, resulting in beatings for the young girl.

Arwen managed to survive very well on the streets. She made her living as a con artist and thief until she was thirteen, and then drifted into the vixen trade. Soon after this, she propositioned Ace Kilcarney in the street, and the rest—-as they say—-is history. Kilcarney convinced her to join his team, and she accepted. Arwen had a great deal of trouble adjusting to the Full House lifestyle at first, and it took the drastic step of Rita turning the girl over her knee for Arwen to calm down enough to be teachable. Her quick mind soon rose to the challenges set for her, and she became a good agent in a short span of time.

Currently, she is functioning as partner to Jeremy Fentress. Her cover as his mistress seems to come easily to her, and with her background, this is not surprising.

Bottomline profile: Arwen is a superb athlete. Her agility is incredible. She loves to win, and has been known to cheat to do so, though she usually can't manage it with the team without getting caught. She has grown to see the members of Full House as her family and is intensely loyal. She looks up to Kevin Kilcarney with near hero worship. She is intelligent and quick to learn, but her greatest weakness is an almost uncontrollable temper. She has the capacity to be a leader, but has never had cause to test the potential.