- The Alcoholic: In WbN volume 2 Jack drowns his sorrows about the curse in large quantities of booze. He even drinks while driving a car.
- Angst: After nearly killing Buck Jacks mood progressively edges towards suicidal. Things start to look up again, until he hits absolute rock-bottom in WbN volume 2.
- Break the Cutie: In the time between volumes 1 and 2 the curse breaks Jack beyond recognition.
- Character Development: Jack has been around since 1972 and has changed quite dramatically over the years. A wide-eyed teenager dragged into all kinds of supernatural mayhem against his will (1970s) → a leather-clad motorcycle riding Anti-Hero living life to the fullest (late 80s-early 90s) → a downtrodden alcoholic doing everything in his power not to have to face reality (late 90s) → a suicidal hotheaded Jerkass looking for a fight (late 2000s) → a pleasant guy looking after monsters when the rest of the world would rather kill them (early 2010s).
- Deadpan Snarker: Jack is one, usually in combination with Self-Deprecation.
- The Drifter: Though his home base is Los Angeles, Jack never stays in one place for very long.
- Enemy Within: As mentioned in X-Factor #224, human Jack vs werewolf Jack is a constant struggle.
- Fake Defector: His stint with the Night Shift is a case of this, especially considering one of his old foes, Tatterdemalion, was also on the team.
- Gosh Dang It to Heck!: Jack mostly uses "stinking" to express displeasure. Possibly justified by his heightened senses, particularly smell, and his human mores remaining in effect. "Stinking" could well become quite the pejorative term if you really know how foul something smells.
- I Am a Monster: It varies, but Jack occasionally sees himself as this. Other times he is more accepting of himself, crossing over into I Am What I Am; often he fluctuates between the two.
- I Just Want to Be Normal: Finding a cure for his condition is what drives Jack in most of his adventures. Even though in Tomb of Terror #1 he admits he sees his werewolf side as his true self and loves the freedom it comes with, he still wants it to end.
- Informed Ability: Many of Jack's powers and abilities as described in the Official Marvel Handbooks are never shown in-story. For example, it's said Jack is a practiced magic user who often casts spells, yet he is only shown doing so one single time (in Marvel Comics Presents #54).
- Limited Wardrobe: While the shirt or jacket he wears (if he wears one) may differ, it seems Jack has stocked his wardrobe to the brink with green pants.
- Magic Pants: Jack manages to ruin his clothes with alarming regularity, but in the majority of cases his pants stay firmly on.
- The Nicknamer: Especially Morbius is on the receiving end of this in later years: Morb, Mikey-boy, M., Dracubilly... Ironically, in Morbius v2, Morbius responds to someone else calling him "Mike" with "I prefer Michael."
- '90s Anti-Hero: Jack developed shades of this after Marvel Comics Presents #54-59 in 1990. He sported longer hair, rode a motorcycle, wore a leather jacket with nothing under it, and suddenly started using colloquialisms. His attitude changed accordingly, from a guy suffering under his curse to reveling in it. After volume 2 he kept the hair and the motorcycle, but The Dark Age of Comic Books was shed.
- Our Werewolves Are Different: Jack inherited the curse from his father, and is forced to change during the three nights a month the moon is full. His werewolf self grows progressively more violent over time, and the pain that accompanies the transformation increases with each full moon. He eventually gains some control over the change with the help of The Three Who Are All, enabling him to transform outside the full moon as well. For a while this control extends to no longer having to change at all during the full moon and retaining his mind at all times, but those days dont last.
Initially the werewolf looks like a typical wolfman à la Lon Chaney Jr. Starting with Moon Knight #29 (1982), his appearance becomes more wolfish, still standing on two legs but with a fully lupine head. This change is explained as his werewolf self regressing ever further after an experiment to gain more control went badly.
- Painful Transformation: Until he is helped by The Three Who Are All, each transformation is more painful than the last. And its not just on a physical level: Jack describes part of the transformation as if his soul is being ripped apart. After he gains control of, the changes become more bearable. But then the full moons come with the added side-effect of glimpsing hell.
- Punny Name: A jack russell is a kind of terrier. But Jack is a nickname for Jacob and Russell is the name of his step-father, so its not like his parents intentionally named him after a dog.
- Redhead In Green: The red-furred werewolf runs around in torn-up green pants a lot.
- Resist the Beast: Jack often tries this while subject to involuntary transformations brought on by the full moon; sometimes it works, usually it doesn't.
- Self-Deprecation: A habit of Jacks. Upon changing into a werewolf through the sheer force of will for the first time: It mightve been the ugliest one on record, but it was still a miracle.
- '70s Hair: Jack (logically) sports it in his appearances during the 70s, but sometimes goes back to it in later years, notably in Witches #1 (2004) and X-Factor #242 (2012).
- Slasher Smile: Jack is quite capable of them, especially in WbN volume 2. Even more so if he couples it with a couple of razor-sharp teeth.
- Stages of Monster Grief: Jack goes from denial to anger to acceptance to seeing his condition as a blessing to self-destruction and back again. In Marvel Zombies 4 #3 he claims hes gone through all five stages of grief and has finally reached acceptance. Team mate Morbius thinks he simply no longer cares whether he lives or dies.
- Stock Superpowers:
- Healing Factor: As long as its not silver through the heart, its likely Jack can heal from it.
- Innate Night Vision: According to the Marvel handbook, but never seen in-universe.
- The Nose Knows: Jack has a heightened sense of smell even in human form, being able to track people and judge their emotions. Once he uses it to sniff out a pedophile purely by the scent he gives off around children, seeing right through the man's feigned disinterest.
- Super Strength: When transformed Jack is capable of lifting sewer grilles "that weigh as much as your mother in law" and flipping over cars.
- Super Toughness: Bullets sting, injuries hurt and "acupuncture tickles", but Jack usually stays upright throughout it all.
- Walking Shirtless Scene: Due to his transformations, Jack spends half of the time shirtless.
- Walking the Earth: Jack mostly rides his motorbike across North America, but ends up in Italy on at least one occasion.
- Wolf Man: How wolf-like Jack's werewolf form looks fluctuates, but he always retains somewhat human proportions, and walks on two legs. Other werewolves, even those subject to the same curse such as Jack's niece Nina, may look much more wolf-like.
The chaffeur of Jack's step-father, who blackmailed him and his wife on the orders from The Committee.
- The Brute: Grant is one head taller than everyone else, and Jack thinks he's probably strong enough to kill a man with his bare fists. He even manages to give the Werewolf a good thrashing before losing his composure upon realizing that he isn't fighting someone in a costume.
- Starter Villain: Even with his strength, he's just a human bully squeezing money out of his employer, and he ends up dying in his introductory issue.
Agathanote was a wannabe occultist who captured Jack in order to find the ancient spellbook Darkhold, which used to be in his father's possession.
- Psychic Powers: She has some telepathic skills, which able her to sense Jack's transformation to his Werewolf form after he escapes from her clutches.
- Skunk Stripe: She has two white stripes on both sides of her Beehive Hairdo.
- The Unfought: After the deaths of her husband Nathan and her assistant Kraig, she tried to do a magical incantation without the help of the Darkhold, and ends up burning to death.
Agatha's misshapen right-hand man, who obeys her every order.
- Artificial Limbs: He lost his right hand due to an unknown incident, and had it replaced with an artificial one with sharp metal talons.
- Berserk Button: If he thinks he's being laughed at, he'll lash out at the supposed perpetrator.
- The Dragon: To Agatha, since she provided him with his new right hand and doesn't "laugh" at him.
- Hoist by His Own Petard: He is killed by an errant lightning bolt striking his metallic hand, which he had raised to slay the Werewolf.
- Third-Person Person: He refers to himself by his own name.
A scientist who bought Castle Russoff from Jack's step-father and moved it to an island in his possession to do his research in peace.
- Names to Run Away from Really Fast: Combines a color and an old English word for spear.
- Well-Intentioned Extremist: In order to perfect the ray that he believes will turn his daughter into a normal human one day, he keeps testing it on unwilling test subjects that keep turning into freaks.
Miles's daughter who was born a mutant.
- Daddy's Little Villain: She became much more devoted to her father after he almost died in the hands of the Werewolf.
- Hoist by His Own Petard: When she tries to turn the Werewolf into stone the second time, she doesn't realize that he's standing on front of a mirror until it is too late and she and her father are turned into stone instead.
- Monochromatic Eyes: She has blank white eyes.
- Names to Run Away from Really Fast: Inherited from her father.
- Sinister Shades: She hides her deadly eyes behind a pair of sunglasses.
- Taken for Granite: She has the power to turn people into stone with her gaze.
Sarnak was a former sound engineer who became a villain for hire when his counterfeit production was discovered and he almost burned to death. He was hired by The Committee to cause chaos in Los Angeles. Created the Tatterdemalion, one of his former pawns.
- Alliterative Name: Sidney Sarnak.
- Good Scars, Evil Scars: His face is covered with scars, which he hides with his mask.
- Hoist by His Own Petard: He is eventually defeated when he loses his hold on his minions, who then unmask him and are implied to kill him.
- Killed Off for Real: Possibly; His death is implied rather than actually shown, but he hasn't shown up again since it happened.
- Malevolent Masked Man: Used a mask to hide his scarred face.
- Mind-Control Device: He uses a special "control whistle" to force derelicts, and even the Werewolf, to do his bidding.
As a kid, Harlan grew to idolize silver screen heroes, and wanted to fight evil just like them. He however developed an extremely black-and-white view of the world, and became a vigilante when no law-enforcement agency wanted to hire him.
- Badass Normal: Despite lacking any super-powers, he's outright beaten a werewolf and the original Spider-Woman in combat.
- Black and White Insanity: You're bad in any sense of the word? You'll meet the Hangman.
- Death by Irony: After switching his methods to wiping out "bad influences" on society by killing the cast and crew of a slasher movie, he's stabbed to death with his own scythe by a film critic who had unwittingly fed him information.
- In the Hood: He wears a hood fashioned after ones worn by medieval executioners.
- The Jailer: He imprisons women to "protect from corruption of the outside world".
- Knight Templar: He wants to rid the world of evil, but doesnt believe in that pesky thing called the law. He was even court-martialed because he killed Nazis a little too gleefully during World War II.
- Sinister Scythe: His weapon of choice along with his trusty noose.
- Would Not Hit a Girl: See Knight Templar above. Leads ot his death when he accidentally kills a woman, leaving him too overwrought to notice someone sneaking up behind him.
Rand was an actor in Hercules-esque movies who is now out of touch with reality, confusing himself and others with the roles from his last movie, and is out to get those he thinks is responsible for the accident that left him scarred.
- Badass Normal: He proves to be so strong that the Werewolf has to actually run away from him.
- Bad with the Bone: His character used a jawbone of an ass as a weapon, and so does he.
- Bald of Evil: Justified because all of his hair has burned away.
- The Brute: Tall, strong and out of his mind.
- Nightmare Face: His face burned badly, leaving him with no lips, a left Mad Eye and strips of flesh covering his right one.
- Physical Scars, Psychological Scars: He went insane after a botched stunt took away his handsome features.
Dr. Redditch was a scientist who sought create a way to suppress the aggressive portions of human brain. When he tries the mixture of his creation for that purpose, he chooses the wrong beaker that does the exact opposite and is turned into hulking brute who names himself DePrayve.
- The Brute: DePrayve is a big brute who likes to brutalize.
- Card-Carrying Villain: "DePrayve is evil!"
- Expy: Of The Mighty Thor villain Mr. Hyde, though DePrayve is a more "bad guy in a body of a good guy" character than him.
- For the Evulz: DePrayve rants about two things: revelling in evil is fun and how sickening his good side is.
- Jekyll & Hyde: Winston, a nice guy scientist who seeks to make the world a better place and DePrayve, all the evil in Winston unleashed who seeks to spread misery and destruction for fun.
- Names to Run Away from Really Fast: DePrayve chose to call himself that because he "is depraved". Simple as that.
- Professor Guinea Pig: Deciding that testing on animals is not enough, Winston decided to test his findings with himself.
- Super-Powered Evil Side: DePrayve is physically stronger than his good side Winston.
An evil sorcerer who seeks to kill everyone in the world and turn their souls into a personal demon army. He was formerly member of Five-Who-Are-All, a group mystical cosmic beings who banished him from their ranks.
- Bald of Evil: And it is slightly larger chranium than a normal humans, since he is actually a former cosmic being.
- Big Bad: Of Werewolf by Night vol. 1, as his plans pose a threat to entire humanity.
- Chest Blaster: He shoots beams of "black light" out of his chest to harm his opponents.
- Evil Sorcerer: He is a practitioner of dark mystic arts.
- Monochromatic Eyes: His eyes constantly alternate between black and white.
- Morally Ambiguous Doctorate: He calls himself doctor. Doctor of what, nobody knows.
- Your Soul Is Mine: He has an ability to steal souls, which he uses to bind their owners to his will and create demons.
Marcosa was an evil aristocrat who used his status to hold parties that would end in a slaughter, and steal his victims souls afterwards. His soul still resides in his old house, and torments anyone who steps inside.
- Artificial Limbs: He has a wooden right leg with talons on it.
- Captain Ersatz: He's a thinly-veiled version of Emeric Belasco, the villain of the novel Hell House by Richard Matheson. The story plays out rather similarly, too, with the exception that there's now a werewolf in it and the novel's anti-psychic machine is replaced by Topaz's powers.
- Combat Tentacles: He turns his hands into tentacles when he is finally forced into physical combat with Jack.
- Ghostly Goals: To be a dick even after death.
- Gold Tooth: He has installed two rubies on his front teeth.
- Manipulative Bastard: He uses illusions of his victims' loved ones to torment them further.
- Your Soul Is Mine: He steals the souls of his victims to gain more power.
One of Sarnak's vagrant army, he later strikes out on his own and wages war on the wealthy by destroying their stuff.
- Ascended Extra: He starts out as Sarnak's unnamed but memorable main henchmen in volume one before returning with his own codename and gimmicks in Jack's post-series appearances.
- Eat the Rich: This is his motivation; he doesn't steal money, jewelry, and expensive things; he just destroys luxury goods and cash and brutalizes the wealthy.
- Expansion Pack Past: When he turned up in Dazzler, he got a sympathetic backstory as a failed stage entertainer.
- The Pig Pen: He's weaponized it; rather disgustingly, he takes advantage of his poor hygiene by throwing his filthy, reeking cloak over people in battle.
- Scarf Of Asskicking: Wears one to hide his face.