The persona was originated by the brilliant scientist Hank Pym's superhero alias after inventing a substance that can change size (Pym Particles), but reformed thieves Scott Lang and Eric O'Grady also took on the Ant-Man mantle after the original changed his superhero identity to various other aliases, such as Giant-Man, Goliath, and Yellowjacket.

Dr. Henry "Hank" Pym was a Biophysicist and Security Operations Center expert who decided to be the original Ant-Man, a superhero after the death of his first wife Maria Trovaya who had been a political dissident in Hungary.

Falling in love with him and believing that his American citizenship would protect her, Maria traveled with Hank to Hungary shortly after their marriage to start their new life together.

After discovering a chemical substance, which he called Pym Particles, that would allow the user to alter his size, he armed himself with a helmet that could control ants.

[2] The duo would be founding members of the Avengers, fighting recurring enemies such as the mad scientist Egghead, the mutant Whirlwind, and Pym's own robotic creation Ultron.

[3] While Pym is the original Ant-Man, he has adopted other aliases over the years including Giant-Man, Goliath, Yellowjacket,[2] and Wasp after Janet's presumed death in Secret Invasion.

[9][10][11] The character, created by Robert Kirkman and Phil Hester, first appeared in Civil War: Choosing Sides #1 (October 2006).

[9] A man of few morals and willing to lie, cheat, steal and manipulate in order to get ahead in life, O'Grady stole the armor for his own selfish plans, which included using his status as a "super-hero" to seduce women,[10] as well as humiliate and torment others.

[14] Paul Rudd and Michael Douglas portray Scott Lang and Hank Pym respectively in media set in the Marvel Cinematic Universe.