X-Factor (vol. 1) #139 (Nov. 1997):
“The Enemy Within”
by Howard Mackie, Duncan Rouleau, Art Thibert, Whitney McFarland, etc.

X-Factor (vol. 1) #139

Title: “The Enemy Within”

Medium: comic

Cover date: Nov. 1997

Publisher: Marvel
Written by: Howard Mackie
Art by: Duncan Rouleau, Art Thibert, Whitney McFarland, Hackshack Studios

19 characters in this story:

(Click links for info about character
and his/her religious practice, affiliation, etc.)
Pub. #
Havok Havok (Alex Summers) hero
CBR Scale: I Catholic (lapsed)
Academy of Tomorrow; Brotherhood of Mutants... 
[Cyclops' brother]
Marvel 592
Mystique Mystique (Raven Darkholme) villain hero
CBR Scale: S mutant supremacist; manifestly non-religious
Brotherhood of Mutants; Dark X-Men...  Marvel 451
Valerie Cooper Valerie Cooper supporting character
  Commission on Superhuman Activities; S.T.A.R.S....  Marvel 253
Polaris Polaris (Lorna Dane) hero
CBR Scale: I Jewish Catholic
Academy of Tomorrow; Horsemen of Apocalypse... 
[studied geophysics in college]
Marvel 464
Forge Forge (Jonathon Silvercloud) hero
CBR Scale: M Native American shamanism
Brotherhood of Mutant Supremacy; Native American...  Marvel 394
Ever Ever villain
CBR Scale: S mutant supremacist
Brotherhood of Mutants; Gene Nation...  Marvel 5
Major Edmond Atkinson supporting character
  [major; Valerie Cooper's ex-husband; led Task Force 12] Marvel 4
Miles Brickman Miles Brickman supporting character
  [U.S. Representative; U.S. Senator] Marvel 16
Gloria Brickman supporting character
  [Mystique's daughter; adopted daughter of Senator Brickman] Marvel 2
Agent Vargas supporting character
 prob. indeterminate  FBI
[major character in X-Factor #139]
Marvel 1
Dr. Robert Casey supporting character
 prob. indeterminate  [removed tracking device from Mystique] Marvel 1
Dr. Sculder supporting character scientist
 prob. indeterminate  FBI
[examined tracking device implanted in Mystique]
Marvel 1
Spider-Man Spider-Man (Peter Parker)
hero scientist
CBR Scale: I Protestant
Secret Defenders; Spider-Man and His Amazing Friends...  Marvel 10,664
Captain America Captain America (Steve Rogers)
CBR Scale: I Protestant
Redeemers; Secret Defenders...  Marvel Timely 5,992
J. Jonah Jameson J. Jonah Jameson
supporting character
CBR Scale: M hates Spider-Man
[Peter Parker's boss; Spider-Man's denouncer] Marvel 1,719
villain group
[largest worldwide subversive organization] Marvel 283
Sabretooth Sabretooth (Victor Creed)
villain hero
CBR Scale: I manifestly non-religious; future: Evangelical "born-again Christian"
Brotherhood of Mutants; Team X...  Marvel 610
Trevor Chase Trevor Chase
supporting character
  [young mutant beaten by Friends of Humanity] Marvel 3
Dark Beast Dark Beast (Henry McCoy)
villain scientist
CBR Scale: S mutant supremacist
Brotherhood of Mutants; Dark Descendants... 
[Henry McCoy from the Age of Apocalypse]
Marvel 116