That requirement alone makes many players avoid this quest altogether, but it gets even worse. This quest will eventually force you to kill Rose of Sharon Cassidy, one of the game's main companions. What most players miss is the end of this quest. Most avid New Vegas fans know about the Van Graff quest 'Birds of a Feather.' This quest lets players become a Van Graff, starting as a bodyguard before assisting in more demanding operations.