Aron
Arranger
Arrowhead
Arsenal
Arsenic

Gertrude Yorkes
Gender: ♀
Member of: Runaways
Owner(s) of: Old Lace
Parent(s): Dale Yorkes, Stacey Yorkes

Features
All-New Official Handbook of the Marvel Universe A to Z 1.FT

Artemis
Asbestos Lady
Asbestos Man
Asgard (I)
Asgard (II)
Asgard Trolls
Asgardian
Asgardian Entities
Ash
Ashake
Ashcan
Askani
Askani'son

Nathan Christopher Summers
Gender: ♂
Alias of: Cable
Universe/Dimension/Timeline: Earth Askani

Features
X-Men Books of Askani 1.FT

Askari

President Jono Baraka ("The Spear")
Gender: ♂

Asmodeus (I)
Asmodeus (II)

Individual of: Inhumans

Asp (I)
Asp (Cleopatra Nefertiti)
Assassin (I)

Gender: ♂
Created by: Apocalypse

Main
Namor the Sub-Mariner Annual 3

Assassin (Maria)

Maria
Gender: ♀

Assassins

Universe/Dimension/Timeline: Earth Amalgam

Asteroid M

Alias: Utopia Island
Created by: Magneto
Headquarter of: Acolytes

Features
Wolverine Encyclopedia 1.FT

Asteroth

(Omega Ray)
Gender: ♀
Individual of: Multiversal and Cosmic Entities
Universe/Dimension/Timeline: Multiverse

Astonishing X-Men
Astra (I)
Astra (II)

Member of: Spaceknights (I)

Astra (III)

Gender: ♀
Member of: Brotherhood of Evil Mutants

Astrans
Astro Vance
Astron

Individual of: Uranians

Astronomer
Vance Astrovik

Gender: ♂
Alias: Justice (Vance Astrovik), Marvel Boy (Vance Astrovik)
Alternate version(s): Astro Vance
Beloved: Firestar

Asylum

Henrique Manuel Gallante
Gender: ♂

Atalanta
Atalon
Ataraxians

Inhabitant(s): Praxagora

Athena
Atladasca Ike

Ike
Gender: ♂

Features
Wolverine Encyclopedia 1.FT

Atlantean Terror Cell
Atlanteans
Atlantis (Namor's Realm)
Atlas (I)
Atlas (Steve Rand)

Steve Rand
Gender: ♂

Atlas (Eric Josten)
Atlas Foundation

Employee(s): Derek Khanata

Atleza
Atom Smasher (I)
Atom Smasher (Ronald and Michael English)

Ronald and Michael English
Gender: ♂
Sibling(s): Atom Smasher (I)

Features
All-New Official Handbook of the Marvel Universe A to Z: Update 4.FT

Atom Smasher (Kevin Leonardo)

Kevin Leonardo
Gender: ♂

Features
Iron Manual Mark 3 1.FT

Attilan
Attuma
August Personage in Jade
Aunt May

May Reilly-Parker
Gender: ♀
Alias of: May Reilly

Features
What If? (II) 7.FT

Auntie Freeze

Ann Fraley
Gender: ♀
Member of: Grapplers

Aurora
Aurora (AgeOfApo)