Religion of
Mister Sinister
Nathaniel Essex

Mister Sinister masqueraded as a number of people who were influential in the life of Scott Summers (Cyclops) while the future mutant leader was growing up. Among these disguises were orphanage operator Dr. Nathan Milbury and bullies "Nathan Masters" and "Lefty." As Nathan and/or Lefty, Mister Sinister led a group that bullied Scott Summers in the orphanage he grew up in. The bullies Nathan and/Lefty who Scott Summers recalls in X-Factor (vol. 1) #34 (Nov. 1988) are apparently not independent characters but mere disguises of Mister Sinister.

This character is in the following 48 stories which have been indexed by this website:
Factor X #1 (Mar. 1995): "Sinister Neglect"
Gambit (vol. 3) #14 (Mar. 2000): "The Sunset Dawn, Book 3: Tomorrow Starts Today"
Tales from the Age of Apocalypse #2 (Dec. 1997): "Sinister Bloodlines"
The Uncanny X-Men (vol. 1) #350 (Dec. 1997): "Trial & Errors"
X-Factor

X-Factor (vol. 1) #-1 (July 1997): "A Summers Tale"
X-Factor (vol. 1) #34 (Nov. 1988): "Death!"
X-Factor (vol. 1) #35 (Dec. 1988): "Go to the Orphan Maker!" (cameo)
X-Factor (vol. 1) #38 (Mar. 1989): "Duet!" (cameo)
X-Factor (vol. 1) #39 (Apr. 1989): "Ashes to Ashes"
X-Factor (vol. 1) #72 (Nov. 1991): "Multiple Homicide" (behind the scenes)
X-Factor (vol. 1) #73 (Dec. 1991): "Crowd Control"
X-Factor (vol. 1) #74 (Jan. 1992): "Politically Incorrect"
X-Factor (vol. 1) #75 (Feb. 1992): "The Nasty Boys"
X-Factor (vol. 1) #78 (May 1992): "Playing With Fire"
X-Factor (vol. 1) #84 (Nov. 1992): "Tough Love" (cameo)
X-Factor (vol. 1) #94 (Sep. 1993): "The Longest, Day Part 2: Eveningwhere" (cameo)
X-Factor (vol. 1) #104 (July 1994): "Malicious Intent!" (cameo)
X-Factor (vol. 1) #105 (Aug. 1994): "Final Sacrifice!"
X-Factor (vol. 1) #131 (Feb. 1997): "Brotherhood" (cameo)
X-Factor Annual #9 (1994): "Contact" (cameo)

X-Men

X-Men (vol. 2) #1 (Oct. 1991): "A Villains Gallery"
X-Men (vol. 2) #14 (Nov. 1992): "Fingers on the Trigger"
X-Men (vol. 2) #22 (July 1993): "The Mask Behind the Facade"
X-Men (vol. 2) #23 (Aug. 1993): "Leaning Towards Oneself"
X-Men (vol. 2) #27 (Dec. 1993): "A Song of Mourning, A Cry of Joy"
X-Men (vol. 2) #34 (July 1994): "Life and Consequences" (mentioned)
X-Men (vol. 2) #39 (Dec. 1994): "Birds of a Feather" (cameo)
X-Men (vol. 2) #45 (Oct. 1995): "The Enemy of My Enemy..."
X-Men (vol. 2) #51 (Apr. 1996): "Deathbound Train"
X-Men (vol. 2) #52 (May 1996): "Collector's Item"
X-Men (vol. 2) #99 (Apr. 2000): "Oh, the Humanity"
X-Men (vol. 2) #202 (Oct. 2007): "Blinded by the Light, Part 3"
X-Men (vol. 2) #203 (Nov. 2007): "Blinded by the Light, Part 4"
X-Men (vol. 2) #204 (Dec. 2007): "Blinded by the Light: Epilogue"
X-Men (vol. 2) #205 (Jan. 2008): "Messiah Complex: Chapter Five"
X-Men (vol. 2) #207 (Mar. 2008): "Messiah Complex: Chapter Thirteen" (mentioned)
X-Men Annual (vol. 2) #1 (Mar. 2007): "Covenant" (2-panel cameo)

X-Men Unlimited (vol. 1) #38 (Nov. 2002): "Yartzeit" (mentioned)
X-Men: Alpha #1 (Feb. 1995): "Beginnings..."
X-Men: Divided We Stand #1 (June 2008): "Danger Room" (mentioned)
X-Men: Legacy

X-Men: Legacy (vol. 1) #211 (July 2008): "Sins of the Father, Part 1"
X-Men: Legacy (vol. 1) #212 (July 2008): "Sins of the Father, Part 2" (2-panel cameo)
X-Men: Legacy (vol. 1) #213 (Aug. 2008): "Sins of the Father: Part 3"
X-Men: Legacy (vol. 1) #214 (Sep. 2008): "Sins of the Father: Part 4"
X-Men: Legacy (vol. 1) #215 (Oct. 2008): "Walkthrough: Part 1"
X-Men: Legacy (vol. 1) #216 (Nov. 2008): "Walkthrough: Part 2" (mentioned)

X-Men: Millennial Visions 2001 (Jan. 2002): "Bishop: Father of Man"
X-Treme X-Men: Savage Land #1 (Nov. 2001): "Savage Genesis" (hallucination)

Suggested links for further research about this character:
  - http://en.wikipedia.org/wiki/Mister_Sinister
  - http://www.imdb.com/character/ch0037362/
  - http://www.comicvine.com/mr-sinister/29-3179/
  - http://www.marvel.com/universe/Sinister_(Age_of_Apocalypse)
  - http://www.marvunapp.com/master/misterimiz.htm
  - http://www.marvunapp.com/master/maramart.htm
  - http://www.comicboards.com/marvelguide/m3.html
  - http://www.comicboards.com/marvelguide/ageofapocalypse.html
  - http://www.marvunapp.com/master/simsir.htm
  - http://www.comicboards.com/marvelguide/n.htm

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