
Avengelyne [uh-van'-jah-leen] is a fictional comic book character created by Rob Liefeld and Cathy Christian. Avengelyne is an angel who fights the forces of evil and often finds herself face-to-face with demons and monsters.

Badrock is a fictional comic book superhero who appears in books published by Image Comics. Created by Rob Liefeld, he first appeared in Youngblood #1.

Rebecca "Rikki" Barnes is a fictional character appearing in American comic books published by Marvel Comics. Created by writer Jeph Loeb and artist Rob Liefeld, the character first appeared in Captain America #1, where she was established as the Counter-Earth incarnation of Bucky during the 1996 "Heroes Reborn" storyline. Rikki crossed over to Earth-616 in the 2008 Onslaught Reborn miniseries, in which she operated as Nomad for a time, later joining the Exiles in another reality, and then the Future Foundation in the mainstream Marvel Universe.

Bloodpool is a fictional group of superheroes and a comic book series created by Rob Liefeld. The series was published by Image Comics in 1996 under Liefeld's Extreme Studios. The team's roster includes Rubble, Task, Seoul, Psilence, Wylder, and Fusion. The underage superheroes were recruited by the government for the eventual inclusion in the prestigious Youngblood team.

Bloodstrike is a fictional team of action/adventure super agents, originally published by Rob Liefeld's Extreme Studios of Image Comics in the 1990s.

Bloodwulf was an American superhero comics title and character created by Rob Liefeld. The character first appeared in the one-shot "Darker Image" in 1993, published by Image Comics. The character later appeared in a Bloodwulf mini-series from 1995 in four issues, illustrated by Daerick Gross Sr.. He also appeared in a one-shot from 1995 entitled "Bloodwulf Summer Special" where he was pitted against Supreme.

George Washington "G. W." Bridge is a fictional character appearing in American comic books published by Marvel Comics. He is a former mercenary and high-ranking agent of S.H.I.E.L.D..

Brigade is an American comic book published by Image Comics and later by Awesome Entertainment, created, plotted, and originally written by Rob Liefeld and first illustrated by Marat Mychaels as a spin-off from the then-popular series Youngblood.

Cable is a fictional character appearing in American comic books published by Marvel Comics, commonly in association with X-Force and the X-Men. The character first appeared as a newborn infant in Uncanny X-Men #201 created by writer Chris Claremont, while Cable's adult identity was created by writer Louise Simonson and artist/co-writer Rob Liefeld, and first appeared in The New Mutants #87.

Chapel is a fictional supervillain/antihero comic book character appearing in books published by his creator, Rob Liefeld. Liefeld created the character in 1992 as member of the government superhero group Youngblood, which started in their series of the same name.

Deadpool is a fictional character appearing in American comic books published by Marvel Comics. Created by writer Fabian Nicieza and artist/writer Rob Liefeld, the character first appeared in The New Mutants #98. Initially Deadpool was depicted as a supervillain when he made his first appearance in The New Mutants and later in issues of X-Force, but later evolved into his more recognizable antiheroic persona. Deadpool, whose real name is Wade Winston Wilson, is a disfigured mercenary with the superhuman ability of an accelerated healing factor and physical prowess. The character is known as the "Merc with a Mouth" because of his tendency to talk and joke constantly, including breaking the fourth wall for humorous effect and running gags.

Domino is a fictional character appearing in American comic books published by Marvel Comics. The character is best known as a member of the mutant team X-Force. Created by writer Fabian Nicieza and artist/co-writer Rob Liefeld, Domino made her first full cover story appearance in X-Force #8 as an original member of the Wild Pack team led by the mutant Cable.

Feral is a fictional character appearing in American comic books published by Marvel Comics. She has been both a superhero and a supervillain and most recognizably associated as a member of X-Force. Feral is the sister of Thornn.

Genesis is a fictional character appearing in American comic books published by Marvel Comics. He is a mutant and foe of Cable and Wolverine. He first appeared in a flashback in X-Force #1 (1991). His first appearance as "Mister Tolliver" is in X-Force #5 (1992) and his first appearance as Genesis was in Cable vol 1 #19.

Gideon is a fictional character, a mutant supervillain appearing in American comic books published by Marvel Comics. He was created by Rob Liefeld and Fabian Nicieza. Gideon was a member of the Externals, a unique type of immortal mutant, and an adversary of the X-Men spin-off group X-Force. He first appeared in New Mutants #98.

New Men was a comic book series published during the 1990s by Image Comics. It was one of the many titles co-created by Rob Liefeld, and released as part of his Extreme Studios imprint. Like many of Liefeld's creations for this and his Maximum Comics line the New Men bore striking similarities to characters from mainstream comic companies; in this case New Men was very similar to Marvel Comics' X-Men franchise. After an initial launch the series underwent a re-design and revamp by writer Eric Stephenson and Penciler Chris Sprouse with Inks by Al Gordon.

Prophet is a fictional character, a superhero who appears in comic books published by Image Comics. Created by Rob Liefeld, he first appeared in Youngblood #2.

Riptide is a fictional comic book superhero from Image Comics. Created by Rob Liefeld, she first appeared in Youngblood #1.

Shaft is a fictional superhero created by writer/artist Rob Liefeld. Liefeld created the character for his Extreme Studios as the leader of superhero team Youngblood.

Shatterstar (Gaveedra-Seven) is a fictional mutant superhero appearing in American comic books published by Marvel Comics. Created by writer Fabian Nicieza and artist Rob Liefeld, the character first appeared in The New Mutants #99, after which he became a member of the superhero team X-Force. He later became an employee of X-Factor Investigations, a private detective firm starring in the series X-Factor. In 2013, ComicsAlliance ranked Shatterstar as #29 on their list of the "50 Sexiest Male Characters in Comics".

Stryfe is a fictional supervillain appearing in American comic books published by Marvel Comics, most commonly in association with the superhero team X-Force. He is a clone of Cable.

Supreme is a fictional superhero created by Rob Liefeld and published by Image Comics, followed by Maximum Press (1996–98), Awesome Entertainment (1999–2000), and Arcade Comics (2006). Although Supreme was originally a violent, egotistical Superman archetype, he was retooled by Alan Moore as a tribute to Mort Weisinger's Silver Age Superman.
Tempo is a fictional African-American mutant character appearing in American comic books published by Marvel Comics. She was first introduced as a member of the Mutant Liberation Front in New Mutants #86.

Youngblood is a superhero team that starred in their self-titled comic book, created by writer/artist Rob Liefeld. The team made its debut as a backup feature in the 1987 RAMM #1 before the next month appearing in the one-shot Megaton Explosion #1 before later appearing in 1992 in its own ongoing series as the flagship publication for Image Comics. Youngblood was originally published by Image Comics, and later by Awesome Entertainment. Upon Rob Liefeld's return to Image Comics, it was revived in 2008, 2012, and 2017. In 2019, Liefeld revealed that he has not owned the rights to Youngblood for several years.