Thats awesome your psychologist skills inspire your works, and a great groundwork for layered character writing too
I don't have indepth psychology experience but did psychology for one of my ge courses in undergrad (game design), similar to you it brought me awareness of how others see the world too, expecially when we got into the topic of serial killers. Awesome artwork and use of contrasts with the black n white
In Sickboy (Series) the Main Characters (brothers Owen and Evan): their 'virus' is their own worst enemy, once they get within 15 feet of another human, the human will instantly convulse and turn into a feral monsters, Evan the older brother pukes a substance that gives birth to one of the villians below.
I saw the virus as my own fear of inconveniencing or causing harm to others. The horror of not being able to control a stuation that leads to a domino effect of you unwillingly harming innocent persons etc.
While the true antagonist isn't made clear yet, there are two potential candidates for the position.
1 FPS guy-
The first character you meet in series, and presented in 1st person (like a FPS player character). Who & where he came from is revealed over time, but little clues like handcuffs, tattoos and orange sleeves can quickly hint some origins. He's the reverse of the heroes, also displaying the virus. But while the heroes would become cautious to avoid spread, he takes pleasure in testing the mechanics of the virus
He is polite and chatty while casually killing townsfolk he comes across, in order to test out things like "how far he needs to be in order to spread the infection" and "test other superhuman symptoms that came with his 'virus'. It's clear he's no stranger to murdering others but is also an opportunist who makes a game of the situation. He hasn't encountered the
MCs yet but if you look between the clues there are some answers already there.
Spoilerish- researching prison culture and gangs documentaries on YT etc was helpful for him, playing GTA (videogame) was an early inspiration too, the heists etc. Also I remember during Covid there were videos of vile people who did horrid things like spit on public services like busses etc, so that also inspired ideas too. At one point he was going to be a serial killer but decided to keep that role to a future character, someone he would take pleasure pissing off as he lacks the meticulous-ness of a serial killer.
2 PUKE-Zilla
This one is more fantasy style, inspired by my love for Godzilla, Dinos, Cryptids and Cosmic Horror. It adds an extra limb to the damage the brothers unwillingly cause. The bizarre 'virus' activates after the brothers and FPS guy hear an eerie sound broadcast one night. And while hearing the sound, Evan (older brother) pukes out a gelatinous life-form that rapidly begins to evolve to Kaiju size. While FPS guy is busy causing chaos from a human scale, this creature flattens towns in its path.
The creature appears to lack signs of high intellect, however it further pushes the mindsets of the brothers:
Owen (the younger brother) has a hard time coping with the mass destruction and begins to blame Evan for Puke Zilla's existence. Meanwhile Evan's thrill for adventure and optimism kicks in and he sees the creature as his responsibility to defeat. Similar to FPS guy, Evan finds joy in testing his limits against the monster.
The FPS guy also has a run in with Puke Zilla early in the series. The creature sends an explosive beam his way. FPS guy is thrilled but remains careful and observant, for an opportunity that would benefit him:
FPS Guy vs PukeZilla:
and here's the series link: