If wanting to join the Black Arm Gang, give her two Phoenix crossbows so you can complete the Shield of Arrav quest.
However, you must find another player trying to complete this quest. This player must be from the Phoenix Gang in order for you both to complete the quest.
Also, during the Heroes' Quest, she gives you the Thieves' armband.
This Data was submitted by: -=G'ed=-, Bunnyfear, TehKam, Carduel, Star, and Powotae.