Silver Surfers (Earth X)

Universe/Dimension/Timeline: Earth X (Earth-9997)

Features
Earth X Sketchbook 1.FT

Silver Wings

Universe/Dimension/Timeline: Earth Ultimate (Earth-1610)

Features
Ultimate Secrets 1.FT

Silverback Surfer

Gender: ♂
Alternate version of: Silver Surfer
Individual of: Marvel Apes (Earth-8101)

Silverclaw
Silvereye
Silvermane
Jemma Simmons
Joe Simon

Gender: ♂
Member of: Marvel Crew
Universe/Dimension/Timeline: Earth Prime

Sin
Sinbad

Gender: ♂

Main
Marvel Spotlight (I) 25

Sin-Eater
Singularity I

Devin Touhy
Gender: ♂
Member of: Bastards of Evil

Singularity II
Sinister Six I
Sinister Six I (Alt)

Alternate version of: Sinister Six I
Universe/Dimension/Timeline: Unknown Universe/Dimension/Timeline

Features
Marvel Universe Millennial Visions 1.FT

Sinister Six II
Sinister Syndicate
Sinsear
Sir Devilfish

Gender: ♂
Alternate version of: Stingray
Member of: Morgana Le Fey's Alternate Avengers

Sir Fulminator

Gender: ♂
Alternate version of: Living Lightning
Member of: Morgana Le Fey's Alternate Avengers

Sir Gawain Robot
Sir Lepard

Gender: ♂
Individual of: New Men

Sir Lyan

Gender: ♂
Individual of: New Men

Sir MacHinery

Gender: ♂
Alternate version of: Machine Man
Member of: Morgana Le Fey's Alternate Avengers

Sir Ossilot

Gender: ♂
Individual of: New Men

Sir Porga

Gender: ♂
Individual of: New Men

Sir Ram

Gender: ♂
Individual of: New Men

Sir Raston

Gender: ♂
Member of: Anachronauts

Sir Steel

Gender: ♂
Member of: Freedom's Five

Siren
Siri

Gender: ♀
Clone/Copy/Impersonator of: Elektra
Individual of: Skrulls

Features
Skrulls! • Secret Invasion Skrulls! 1.FT

Sirians
Siris
Sirusites
Siryn

Theresa Rourke-Cassidy
Gender: ♀
Alias: Banshee II
Member of: Fallen Angels, X-Corps, X-Factor Investigations, X-Force I, X-Men I
Parent(s): Banshee I

Main
Marvel Comics Presents (I) 43
X-Factor (IV) 200
X-Factor Premiere (HC): Invisible Woman has Vanished 1
X-Factor Premiere (HC): Second Coming 1
X-Factor TPB (I) 9

Lead
Civil War Premiere (HC): X-Men 1
Civil War TPB: X-Men (II) 1
Hulk Omnibus (HC): World War Hulk 1
World War Hulk: X-Men 3
X-Factor (III) 8 - 9, 21 - 23
X-Factor TPB By Peter David: The Complete Collection 1 - 2
X-Men vs. Hulk TPB 1

Support
X-Factor (III) 24
X-Factor TPB By Peter David: The Complete Collection 2

Cameo
Hulk Omnibus (HC): World War Hulk 1
World War Hulk: X-Men 2
X-Men vs. Hulk TPB 1

Features
All-New Official Handbook of the Marvel Universe A to Z 10.FT
Deadpool (II) 51.FT
Essential Official Handbook of the Marvel Universe 1.FT
Essential Official Handbook of the Marvel Universe Deluxe Edition 2.FT
Essential The Official Handbook of the Marvel Universe Master Edition 3.FT
Marvel Swimsuit Special 3.FT
Marvel X-Men Collection 1.FT
The Official Handbook of the Marvel Universe 10.FT
The Official Handbook of the Marvel Universe Deluxe Edition 12.FT
The Official Handbook of the Marvel Universe Master Edition 10.FT
X-Factor (IV) 200.FT
X-Force (I) 81.FT
X-Force Annual (I) 2.FT
X-Force/Cable Annual '95 1.FT
X-Force/Cable Annual '96 1.FT
X-Force/Cable Annual '97 1.FT
X-Force/Spider-Man 1.FT
X-Men (II) • New X-Men (I) • X-Men Legacy (I) 200.FT
X-Men Ashcan Edition 1.FT
X-Men: Messiah CompleX 1.FT
X-Men: The Ultra Collection 5.FT

Sise-Neg
Sister Agony

Gender: ♀
Member of: Sisters of Sin

Sister Death

Gender: ♀
Alias of: Torso
Member of: Sisters of Sin

Sister Dream

Gender: ♀
Alias of: Hoodwink
Member of: Sisters of Sin

Sister Grimm
Sister Maggie
Sister Nil
Sister Pain

Gender: ♀
Alias of: Slash
Member of: Sisters of Sin

Sister Pleasure

Gender: ♀
Alias of: Raunch
Member of: Sisters of Sin

Sisterhood of Askan
Sisterhood of Evil Mutants

Features
Rom 50.FT

Sisterhood of the Wasp
Sisters of Sin
Jasper Sitwell
Six
Six Pack
Six Pack (Ultimate)

Universe/Dimension/Timeline: Earth Ultimate (Earth-1610)

Features
Ultimate Secrets 1.FT

Six-Fingered Hand
Skaar
Skadi
Skein
Skeleton Crew
Skeleton Ki
Skids
Skin
Skinner

Gender: ♂
Member of: Lilin

Skirn Breaker of Men
Skitter I

Gender: ♂
Member of: Lilin

Skitter II

Member of: Morlocks

Sklarr

Individual of: Ergons

Skornn