Renault will always die if done on the Xbox 360. However, on the PC, one can cheat their way into the room with the assassins inside. Before Renault gets into the room, kill the Assassins. She will only go unconscious. Also, everyone acts as if she is dead. She, however, will pull out her torch and run to the end of the room. She will not attack anything or anyone. She can still be spoken to, but she flees when the rats break into the room. She will do nothing more. Her shortsword can be pickpocketed, but not her torch.