Still posing as the Earth-616's Courtney Ross, she has joined the Hellfire Club as its White Queen, with Viper, a former HYDRA assassin, as her self-proclaimed "White Princess" and bodyguard. Someone claiming to be Courtney Ross has been seen in issues of "Uncanny X-Men" during the "House of M" crossover, as well as in the early issues of "New Excalibur". Upon meeting Captain Britain during the House of M event, she was attacked and was accused of being her impostor, Sat-Yr-9, but upon revealing that she did not possess a tattoo on her thigh, was believed to be the true Courtney Ross (possibly resurrected as a side-effect of "House of M"). The "Official Handbook of the Marvel Universe" does not confirm if this was the true Courtney Ross, resurrected, or Sat-Yr-9 continuing to pose as her. She is then shown sacrificing herself to save Captain Britain from an attack by the Omega Sentinel. After the events of "House of M", Sat-Yr-9 returns. She tries to convince Captain Britain that she is the real Courtney Ross, although he is still unconvinced. Later on, he has warmed up to the idea of Courtney actually being herself again, referring to her as Courtney and confiding in her.