Egon had an unusual upbringing. His parents discouraged playing with toys, in favor of more academic pursuits. He claims to have had only one toy as a child, a slinky, which he he straightened out. As a result of spending much of his childhood in solitary study, he tends to be awkward in social situations, and once described himself as "always serious".
Egon met his fellow Ghostbusters Peter Venkman and Ray Stanz at university and they become close friends, with Ray and Egon stated as playing lots of games with 3 dice together by Venkman. Among the Ghostbusters, Ray is most like Egon in intellect and temperament, and often understands him best. Upon completing their degrees they all get jobs working for the university, in the department or paranormal research. While also studying paranormal literature in their spare time, especially works related to reincarnation and the spirit world.
Egon being both the most brilliant mind of the Ghostbusters and the most open to possibilities, (bar the possible exception of Ray) was the always the first choice interviewer to perspective clients and " whack jobs" as Peter calls them, since he would sit and listen to whatever was said, no matter how crazy it may sound. This trait continued when the 3 of them are fired from there positions at the university, and go to work for themselves.
After using Ray's inheritance money to secure property, the Ghostbusters begin the process of setting up their headquarters and getting the prototype gear ready. After a few weeks the firehouse is up and running, and Ghostbusters hire Winston Zedmore as the fourth Ghostbuster and Janine Melnitz as their receptionist.
While a certified genius, Egon is know to be quite humorous as well, especially in his battles of will with fellow Ghostbuster Peter Venkman, to whom he once commented that women would be more attracted to his epididymitis than his brain. Egon is also prone to odd understatement as well, stating that crossing the stream of the proton packs "would be bad," which he later clarifies to "Try to imagine all life as you know it stopping instantaneously and every molecule in your body exploding at the speed of light."
One of Egon's main vices is a major sugar addict. He is often seen snacking on sweet treats and is rewarded by Venkman with some form of tasty snack. Slimer raids Egon's stash on several occasions. While usually a calm and quite quiet man of science, Egon has also been shown to occasionally show bursts of anger, including him swearing a couple times in first movie, and even trying to confront and and strike Walter Peck. However, Egon is generally the most level-headed and to-the-point Ghostbuster.
Egon's intellect far surpasses that of a regular university education. He was years ahead of his peers while still a young boy. It is his keen intellect that allows him to analyse a situation & strategise the Ghostbusters way to success.
Being the main brains behind the Ghostbusters' gear nearly everything they use to work is made by Egon with occasional help from Ray. These inventions include:
The main weapon in the Ghostbuster arsenal, is used to wrangle and keep the catch steady above a trap. In the recent video game the stream was updated to include a boson dart blast option which is a concentrated ball of energy used to tire ghosts for capture. The pack works by bonding with the negatively charged ghost it tires and allows some control on the ghost movement depending on their size.
The portable containment vessel which ghost are temporary stored in, till they can be placed in the main storage unit at Ghostbusters HQ. Ghosts are simply wrangled above unit, then when triggered the ghost is pulled down into the device via a cone of energy.
The Psycho-Kinetic Energy meter is a device used to tack the movement of ghost, buy detecting there energy traces in the environment, making a beep and buzz when traces are either closer or further away. Later updated to include a database from the Tobins spirit guide in order to identify traces and catalog new variants of ghost.
Used in conjunction with the PKE meter in order to get visual sightings of ghost traces and to scan areas for hidden threats, mainly worn by ray.
A new beam variant from game used to slow down ghosts for easier capture, also have a secondary mode as a stun shotgun like fire-mode which destabilizes the ghosts form.
A long range stream used to vaporize any ecotoplasmic material in its path, overload pulse secondary mode which like the Boson dart is small concentrated ball of energy from the collider stream.
Non-Ghostbusting inventions include a pop-up tent that fits into a suitcase, powered roller skates that have a force field barrier to protect from flying insects, and an inflatable raft that fits into a pencil case.
Egon has conducted many weird and interesting experiments whilst with the Ghostbusters, including:
- Trepanation - where he planned to drill into his own head and expand his intellect before being urged not to by Venkman
- Singing, sleeping with, playing music to and general nurturing of the mood slime to monitor its behavior.
- Deliberately setting up couples to argue, via leaving them to wait to a steadily increasing heated room.
- Placing a young girl in a room full of toys and a puppy, then removing the puppy.
"I collect spores, molds, and fungus."
"Crossing the streams would be bad."
"Sorry Peter, I'm terrified beyond the capacity of rational thought."