Characters

X-Men

 * Beast
 * Colossus
 * Cyclops
 * Emma Frost
 * Forge
 * Iceman
 * Jean Grey
 * Nightcrawler
 * Professor X
 * Rogue
 * Shadowcat
 * Storm
 * Wolverine

X-Men (Days of Future Past)

 * Berzerker
 * Bishop
 * Domino
 * Firestar
 * Hellion
 * Kamal
 * Marrow
 * Polaris
 * Professor X
 * Rover
 * Vanisher
 * Wolverine
 * X-23 and duplicates

Brotherhood of Mutants

 * Avalanche
 * Blob
 * Domino
 * Quicksilver
 * Toad

Acolytes

 * Magneto
 * Mystique
 * Scarlet Witch
 * Polaris
 * Scanner
 * Mellencamp
 * Senyaka
 * Kleinstock Brothers
 * Pyro
 * Blink
 * Mercury
 * Juggernaut

Marauders

 * Mister Sinister
 * Arclight
 * Archangel
 * Blockbuster
 * Harpoon
 * Multiple Man
 * Vertigo

Hellfire Club

 * Sebastian Shaw
 * Donald Pierce
 * Harry Leland
 * Selene
 * Stepford Cuckoos

MRD/Project: Wideawake

 * Senator Kelly
 * Warren Worthington II
 * Bolivar Trask
 * The Sentinels
 * The Prowlers
 * Master Mold
 * Dr. Sybil Zane
 * Colonel Moss
 * Kavita Rao
 * Agent Haskett
 * Dr. Peterson

Weapon X

 * Professor Thorton
 * Abraham Cornelius
 * Sabretooth
 * Maverick
 * Mystique
 * X-23

Other mutants

 * Apocalypse
 * Bastion
 * Boom Boom
 * Petra
 * Dazzler
 * Dust
 * Feral
 * Fever Pitch
 * Gambit
 * Magma
 * Network
 * Nitro
 * Pixie
 * Psylocke
 * Quill
 * Rockslide
 * Sauron
 * Shadow King
 * Shatter
 * Silver Samurai
 * Squidboy
 * Tildie Soames
 * Wolfsbane

Other characters

 * Mojo
 * Spiral
 * Reavers
 * Nick Fury
 * Bruce Banner/Hulk
 * Wendigo
 * Mariko Yashida