Aegis is a fictional character

Fictional character

A character is the representation of a person in a narrative work of art . Derived from the ancient Greek word kharaktêr , the earliest use in English, in this sense, dates from the Restoration, although it became widely used after its appearance in Tom Jones in 1749. From this, the sense of...

, a comic book

Comic book

A comic book or comicbook is a magazine made up of comics, narrative artwork in the form of separate panels that represent individual scenes, often accompanied by dialog as well as including...

 cosmic entity published by Marvel Comics

Marvel Comics

Marvel Worldwide, Inc., commonly referred to as Marvel Comics and formerly Marvel Publishing, Inc. and Marvel Comics Group, is an American company that publishes comic books and related media...

 and appearing as an enemy of Galactus

Galactus

Galactus is a fictional character appearing in comic books and other publications published by Marvel Comics. Created by writer-editor Stan Lee and artist and co-plotter Jack Kirby, the character debuted in Fantastic Four #48 , the first of a three-issue story later known as "The Galactus...

. Created by writer Keith Giffen and artist Andrea DiVito, the character first appeared in Annihilation: Silver Surfer #3 (Aug. 2006). She is a member of the Proemial Gods and an ally of fellow member, Tenebrous

Tenebrous (Marvel comics)

Tenebrous is a fictional character, a Marvel Comics cosmic entity appearing as an enemy of Galactus.-Origin and War:Shortly after the Big Bang of the Marvel universe, the Proemial Gods arose from the very universe itself, collectively existing to maintain the cosmic consonance between order and...

.
Shortly after the Big Bang

Big Bang

The Big Bang theory is the prevailing cosmological model that explains the early development of the Universe. According to the Big Bang theory, the Universe was once in an extremely hot and dense state which expanded rapidly. This rapid expansion caused the young Universe to cool and resulted in...

 of the Marvel universe

Earth-616

In the fictional Marvel Comics multiverse, Earth-616 or Earth 616 is the name used to identify the primary continuity in which most Marvel Comics titles take place.-Origin of Earth-616:...

, the Proemial Gods arose from the very universe itself, collectively existing to maintain the cosmic consonance between order and chaos in the universe and to prepare "what exists for what is to come." Individually, each Proemial God became a caretaker of a specific universal mechanism, with Aegis of All Sorrows being tasked with "culling the living universe of divergences and aberrations." Over time the universe evolves, and life-forms begin to populate the cosmos.