Air-Walker (Gabriel Lan)
Ajak
Ajaxis
Akemi
Alain
Albert Cleary
Albion
Alex Power
Alex Wilder
Alexa Mendez
Alexander Pierce
Alice
Alicia Masters
Alpha Flight
Alpha Flight (Ultimate)
Alvin Maker
Amadeus Cho
Amanda Sefton
Amazoness
American Eagle (Jason Strongbow)
Amiko
Amora
Amphibian (Earth-712)
Amun
Ancient One
Ancient One (Ultimate)
Angel (Angel Salvadore)
Angel (Thomas Halloway)
Angel (Ultimate)
Angel (Warren Worthington III)
Angela (Aldrif Odinsdottir)
Anita Blake
Anne Marie Hoag
Annihilus
Anole
Ant-Man (Eric O'Grady)
Ant-Man (Hank Pym)
Ant-Man (Scott Lang)
Anthem
Apocalypse
Apocalypse (Ultimate)
Aqueduct
Arachne
Araña
Arcade