Neurotoxin

Neurotoxin is the alias of Hans Schultz, a German accountant who fled to Cobalt City after embezzling money from the company he worked for, he is attacked by Cygmus Kord, one of the bounty hunters working for Egos Pr'awn, who then fuses his consciousness with Hans' to use him as a human disguise as he hunts down Star-Forger, all the while their personalities blend further until they're barely indistinguishable from one another.

Appearance
In the human form of Hans, he is a man in his 50s with short, swept pale brown hair, thick-rimmed black glasses, and thin but scruffy gray facial hair. In his current appearance, he wears a gray suit.

In his gaseous form, he takes the form simply as a cloud of green gas.

As it starts to rain, he takes a car and forms its metal and parts into a containment suit, turning into a humanoid form of rubber piping and tubes plated with silver, steel armor and more translucent tubes filled with his gas form throughout. His head also takes the appearance of a gas mask, with a pentagonal glass visor.

Personality
As Hans, he was greedy and a bit selfish, embezzling funds from his company and fleeing to America, all while asking his wife to not say anything to the authorities. Despite this, he still cares about his family and is at first incredibly hesitant to hurt anybody after Cygmus fuses with him. As their personalities begin to merge, though, Hans becomes much more accustomed with killing and begins to do it simply because he wanted to.

As their personalities merge completely, Neurotoxin holds no care for Hans' family nor his job to retrieve the Star-Forger Device for Egos, at this point wanting to kill Scott and take it for himself.

Powers and Abilities

 * Gas Manipulation: Neurotoxin is composed of and can produce and manipulate toxic, green nerve gas that is capable of suffocating humans in mere moments. The gas has also been shown to be capable of taking on corrosive properties, melting off a mans face and through a wall with ease. He has also been seen to be able to use this form to move through matter, at one point walking through a wall.
 * Shapeshifting: Neurotoxin also has a degree of shapeshifting, being capable of taking on the human form of Hans, along with being able to form the parts of a car into a containment suit around him. Along with this, he has been shown to be capable of forming the gas into other solid shapes, such as blades.
 * Regeneration: In the human form of Hans, after getting into a violent car-wreck, he was able to partially turn the wounded parts of his body into has and back, instantaneously healing them.
 * Hallucinations: The gas he is composed of and can produce also induce hallucinogenic effects, such as causing Scott to see the corpse of a motorcyclist turn into an alien creature or cause reality to "glitch" around him.
 * Reanimation: Neurotoxin is also capable of partially reanimating the corpses of his victims, using the gas left in their bodies to puppeteer them.

Weaknesses

 * Rain: Neurotoxin is incredibly weak to the rain, as it is capable of easily dissipating his gaseous form. As it began to rain, he was forced to create a containment suit to protect himself, and as it was breached by Star-Forger, he was left completely vulnerable as the rain caused him to dissipate entirely.