Mr. X

Ms. America (America Chavez)

Ms. Marvel (Kamala Khan)

MS2

Mulholland Black

Multiple Man

MVP

Mysterio

Mysterio (Daniel Berkhart)

Mysterio (Francis Klum)

Mystique

Mystique (Age of Apocalypse)

Mystique (House of M)

Mystique (Ultimate)

Nakia (Nakia)

Namor

Namora

Namorita

Naoko

Natasha Romanoff

Nebula

Nehzno

Nekra

Nemesis

Network

New Goblin

New Mutants

Newton Destine

New Warriors

New X-Men

Next Avengers

Nextwave

Nick Fury

Nick Fury (LEGO Marvel Super Heroes)

Nick Fury (Ultimate)

Nicolaos

Nico Minoru

Nightcrawler

Nightcrawler (Ultimate)

Nighthawk

Nightmare

Night Nurse (Earth-9997)

Night Nurse (Linda Carter)

Nightshade

Night Thrasher

Night Thrasher (Dwayne Taylor)

Nine-Fold Daughters of Xao

Nitro

Nocturne

Nomad

Nomad (Rikki Barnes)

Nomad (Steve Rogers)

Norman Osborn

Norrin Radd

Northstar

Nova

Nova (Frankie Raye)

Nova (Sam Alexander)

Nova (USM)

Nuke

Obadiah Stane

Odin

Ogun

Okoye

Old Lace

Old Man Logan (Earth-807128)

Omega (Michael Pointer)

Omega Flight

Omega Red

Omega Sentinel

Omega the Unknown

Onslaught

Onslaught (Ultimate)

Oracle

Ord

Orphan

Orphan-Maker

Otto Octavius

Outlaw (Inez Temple)

Outlaw Kid

Overlord

Owl

Ozymandias

Paibok

Paladin

Pandemic

Paper Doll

Patch

Patriot

Payback

Peggy Carter (Captain Carter)

Penance (Monet St. Croix)

Penance (Robert Baldwin)

Pepper Potts

Pestilence

Pet Avengers

Peter Parker

Peter Quill

Pete Wisdom

Phalanx