Chris Claremont, John Byrne
Ann Nocenti, Arthur Adams, Carl Potts
(current) Emma Frost operates from the Massachusetts Academy, Snow Valley, Massachusetts, (former) Hellfire Club mansion in New York City, a home in the Berkshire Mountains in Massachusetts (near the Massachusetts Academy), and places of residence in vari
X-Factor Investigations Headquarters, New York City, New York; formerly Detroit, Michigan; mobile; Xaviers School for Gifted Youngsters, Salem Center, Westchester County, New York; Mojoverse; Cootermans Creek, Australian Outback, Australia; Alcatraz I