Geiger is a fictional character in the Marvel Universe

Marvel Universe

The Marvel Universe is the shared fictional universe where most comic book titles and other media published by Marvel Entertainment take place, including those featuring Marvel's most familiar characters, such as Spider-Man, the Hulk, the X-Men, and the Avengers.The Marvel Universe is further...

. She first appeared in Doc Samson

Doc Samson

Doc Samson is a fictional character, a superhero and psychiatrist in the Marvel Comics universe, known as a supporting character in stories featuring the Hulk.-Publication history:...

 #1 (Jan 1996), created by Dan Slott

Dan Slott

Dan Slott is an American comic book writer best known for The Amazing Spider-Man, Arkham Asylum: Living Hell and She-Hulk. He is the current writer of the twice monthly The Amazing Spider-Man.-Early writing:...

.

Fictional character biography

Delilah "Dee Dee" Dearborn was a student at Empire State University

Empire State University

Empire State University is a fictional university in the Marvel Comics Universe, a mixture of New York University and Columbia University . It is located somewhere in New York City, in Greenwich Village near the site of New York University...

 who gains superhuman powers from an accident with a gamma accelerator at the school. Doc Samson

Doc Samson

Doc Samson is a fictional character, a superhero and psychiatrist in the Marvel Comics universe, known as a supporting character in stories featuring the Hulk.-Publication history:...

 mistakes her for a murderer and they fight. She later helps him track and confront the real killer.

Initiative

Geiger is seen at the military base Camp Hammond, as an official recruit for the Initiative

Avengers: The Initiative

Avengers: The Initiative was a comic book series from Marvel Comics. Written by Dan Slott and Christos Gage with artwork initially by Stefano Caselli, Steve Uy and Harvey Tolibao, the series dealt with the aftermath of Marvel's Civil War crossover Avengers: The Initiative was a comic book series...

, which is a super-human military draft. She is introduced to Camp Hammond along with Ant-Man

Ant-Man (Eric O'Grady)

Ant-Man is a fictional character, a superhero in the . He is the third character to use the name Ant-Man. He first appears in The Irredeemable Ant-Man #1 and was created by Robert Kirkman and Phil Hester....

, Crusader, Melee

Melee (comics)

Melee is the code name of a fictional comic book character within Marvel Comics' shared universe the Marvel Universe. She first appeared in Avengers: The Initiative #8 and was created by Dan Slott, Christos N...

, Geldoff

Geldoff

Geldoff is a fictional character in Marvel Comics who first appeared in the Ultimate Marvel Universe's Ultimate Spider-Man #40 written by Brian Michael Bendis with art from Mark Bagley. Geldoff was brought into the main Marvel Universe by Dan Slott and Christos N...

, Dragon Lord, Red Nine

Red Nine

Red Nine is a fictional character in the Marvel Universe. He first appeared in The Amazing Spider-Man #264 .-Publication history:...

, and Diamondback

Diamondback (comics)

Diamondback is the name of four fictional characters appearing in comic books published by Marvel Comics.-Publication history:Diamondback first appeared in Captain America #310 , written by Mark Gruenwald and illustrated by Paul Neary.-Willis Stryker:The first Diamondback was a foe of Luke Cage...

.

She was one of the trainees that attacked KIA and were defeated.

Dark Reign

Following the events of Secret Invasion

Secret Invasion

"Secret Invasion" is a comic book crossover storyline that ran through a self-titled eight issue limited series and several tie-in books published by Marvel Comics from April through December 2008....

, Geiger graduated from the Initiative and was assigned to New Mexico's Initiative team the Mavericks.

Heroic Age

Geiger appears at a meeting held by Prodigy

Prodigy (Ritchie Gilmore)

Prodigy is the name of a superhero in Marvel Comics.-Fictional character biography:Ritchie Gilmore is a typical jock, captain of his college wrestling team, and one of the most popular guys in school. But Ritchie wants more from life; he wants to be stronger and more powerful...

 regarding magical hammers that have crashed into the earth. She saves Gravity

Gravity (comics)

Gravity is a fictional character, a superhero in the Marvel Comics universe. He first appeared in Gravity #1 and was created by Sean McKeever and Mike Norton.-Publication history:...

 from a grenade thrown by Crossbones

Crossbones (comics)

Crossbones is a fictional character, a supervillain in the Marvel Comics universe. He was created by writer Mark Gruenwald and artist Kieron Dwyer in Captain America #359-360 . Crossbones usually appears as a henchman of the Red Skull...

, but is injured when it explodes.

Powers and abilities

Due to a Gamma radiation accident, Geiger has the ability to mimic the powers of any gamma-powered beings in her immediate vicinity, potentially making her as strong as the Hulk, as intelligent as the Leader, etc. However, she has little control over these powers, a downside exacerbated by the fact that she also takes on personality aspects of whoever she is mimicking as well.