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