Jenny (left) and Sammie (right), about to kick some undead ass
"Years after the crippling outbreak that turned most of the human population into undead, a small community of survivors have taken up residence on an island, home to the abandoned facilities of the Argus Research Campus."
Art Evolution: In the early chapters, the character designs were simpler, with some Animesque stylistic conventions, particularly during comedic moments. Beginning at Chapter Three, and coinciding with the plot's turn for the dark, the designs become more realistic and the atmosphere more gritty and detailed.
Art Shift: The details get cranked up to 11 whenever a zombie shows up. On the other hand, Animesque facefaults still manifest at given comedic moments.
A Storm Is Coming: Jasper all but tells Maureen this just before the outbreak on the ARC expands in earnest.
Maureen: "Laying it on a bit thick, aren't you?"
Jasper: "I wish I was! Everybody's got their own agenda. Mercer's trying for a cure, Masao doesn't think we should leave the island at all. You don't want Arthur agreeing with that. And Ilea? She thinks she's got a solution to the infected on the Island already."
Cloudcuckoolander: Katie, again. She's always been a little off, but it's recently been revealed that she's a severe PTSD-case and hallucinates zombies when frightened. Her style of beingfriendly is likely a result of this.
Cluster F-Bomb: Take out the profanity and the script gets a lot shorter.
Deer in the Headlights: "Freezing up" in in-world slang. The characters have started taking bets over whether newbie zombie hunters will do this when confronted with the slavering hordes for the first time.
Looks like it might get worse. She's an Infected, and is aware of the fact that her death will cause her to reanimate if it's not done via Boom, Headshot. When she committed suicide, she didn't do it that way. Which means there is now a Basilisk zombie on the ARC island.
Infant Immortality: Averted. A short strip details a kid running away from the zombies after the initial outbreak. Eventually they find an abandoned house in the woods, the kid goes to sleep hiding under a bed and is woken by a zombie dragging him out. It's heavily implied the kid is killed.
Charlie can be an uptight, surly jerk to pretty much everyone around him, but it's hard not to feel sorry for the poor guy as he earnestly tries to get along and relate to his new squadmates as they coldly rebuff him. Megan's pretty much the only real friend he has, and the only person who treats him like a human being.
In theory, all of the main cast can be considered this. Many of them are Wastelanders, who were brought to the ARC after having survived on their own in the wasteland for a very long time, and some of whom had traumatic lives even before that (like Sam, whose parents were extremely abusive). And then, upon being brought onto the island, are treated badly by the ARC and by the island's populace. Even Milo, who is easily the nicest person on the team, is notably a Knight in Sour Armor as a result of all this.
Mrs. Walters. Considering the only family she had left is dead, and all.
Man in White: The half-zombie is dressed in bright white - and manages to stay that way - despite his constant wading through blood and gore. He explains how this is possible while during a "fan mail" strip : he uses Gain laundry detergent between every panel.
A decently-likely necessity if you survive being — played with — by Berserkers.
One of type of zombie is called a Mercy. They actively seek out the suffering, protect them from other zombies, then put them out of their misery while gently cradling them in their arms. It's both touching and terrifying.
Our Zombies Are Different: There are at least seven different types of zombie, ranging from the shuffling, pathetic Crawler to the deadly efficient Hunter. Two other types have superabilities to paralyze or incapacitate humans, and yet another exists to give a sickeningly gentle Mercy Kill to the suffering. Perhaps the most feared are the Berserker zombies, which have near-human intelligence, are insanely strong, and like to kill slowly and creatively.
Put on a Bus: Daniel. He hasn't been seen since the comic began its epic flashback storyline. Justified in that he was apparently a new addition to the group—ala-Jameson—at the start of the story, and the flashback hasn't caught up to his introduction yet.
Youth Is Wasted on the Dumb: The opening arc finds the Zombie Hunters led astray into a zombie-dense "red zone," for three days straight, because the young team captain felt like doing a little looting.
Zombie Gait: Some zombies do the requisite shuffle and moan, but others are swift, silent, and lethal. Mercies are graceful and patient, while Berserkers are swift, loud, cruel, and lethal.
Zombie Infectee: Infected humans "turn" shortly after death. The introduction of zombie saliva into the bloodstream (usually through a bite) causes an active infection which is fatal within hours. But contact with any other bodily fluid merely causes a latent infection in which the Virus remains dormant and has no real effect on the victim's health. Infected humans may spread the Virus to others but they will not die of it themselves.
Zombie Puke Attack: The comic features 7 different subspecies of zombie, one of which can attack by vomiting a sort of corrosive poison up to 50 ft. Suitably, they are called spitters.