As Kevin: Prime is a superhero character created by Bob Jacob, Gerard Jones, Len Strazewski, Norm Breyfogle, and Bret Blevins.

[1] The character is a thirteen-year-old boy named Kevin Green with the power to transform into the physical form of a super-powered adult, but with his adolescent mind unchanged.

The character first appeared in Prime #1 (cover-dated June 1993), written by Gerard Jones and Len Strazewski and illustrated by Norm Breyfogle.

As part of the Ultraverse imprint, the comic was set within the company's shared universe of super-powered beings commonly referred to as "Ultras".

Writers Jones and Strazewski used the book to explore a number of themes, such as the place of role models in establishing personal definitions of heroism.

Prime began his heroic activities attacking a gym teacher that was molesting Kelly, a classmate Kevin has a crush on.

[5] Later, Prime fought a demon that took the form of a cartoon character,[6] and was recruited by the U.S. government for a special mission on the Moon.

Alongside other ultraheroes, Prime protected the Entity, a crashed alien starship that was causing the Jumpstart Effect, from attack from Mundi's minions.

[11] Worrying about his son, Russell Green hired the Private Detective Alec Swan, alias Firearm, who infiltrated the army base of Samuels and rescued Kevin.

In the aftermath of the invasion of Attalon, Prime joined other heroes, an presented to the President of United States in the White House.

Prime can revert to his teenage form by destabilizing the outer body into a mess of protein goo, either consciously or when his Prime-body's energy reserves run out.

As Prime, Kevin possesses tremendous strength with unknown limits, once lifting an entire outdoor gym with relative ease.

Another Ultraverse character who shares a similar origin, Elven, is a fan of Elfquest comics and creates a body for herself that is a mishmash of various Tolkienesque fantasy elements.

Common elements exist among the different Prime-bodies though, such as a stylized 'P' resting somewhere on his chest or cape and some metallic adornment such as chains or gauntlets.

[16][17] In June 2005, when asked by Newsarama whether Marvel had any plans to revive the Ultraverse, Marvel editor-in-chief Joe Quesada replied that: Prime was a recurring character in the short-lived Ultraforce cartoon show, where Hardcase acts as his mentor (as he is the only one in the team who knows that Prime is a teenager), and he constantly bickers with Prototype, usually insulting him because his lack of super powers.

Prime also starred in a Sega CD disc published by Sony Imagesoft bundled with Psygnosis' Microcosm video game.