History Characters / Grossology

* TeenGenius: Just like Abby and Ty, he's a pretty smart guy and even does most of the technical work in the field.

* RedEyesTakeWarning
* ScaryTeeth

* BlobMonster: Part-man, part-slime mold

* FatBastard
* FatSlob
* {{Gonk}}

* YellowEyesOfSneakiness

* BaldOfEvil
* BeardOfEvil: He wears a goatee.

* MadScientist

* MadScientist

* DarkIsEvil

* PlantPerson

* SweetTooth

* AlphaBitch

* {{Expy}}: Often compared to WesternAnimation/KimPossible, if she had brown hair and was into gross things.

* {{Tomboy}}: This is a given since she's a grossologist. Her interests include things that involve being active and has no problem whatsoever with dealing with gross situations. She's even got a ponytail to boot.
* TomboyishPonytail:

* EvilOldFolks: Has definitely aged a lot since her days as a university student.

* IWasQuiteALooker: Used to be tall and handsome.

* AnimalMotifs: Owls.

* GirlyGirlWithATomboyStreak: Despite being a girly AlphaBitch, she enjoys sports such as basketball and even challenges Abby in a chocolate shake-drinking contest in one episode.

* AmazingTechnicolorPopulation: She has pale green skin.

Abby unravels mysteries so disgusting that no adult will touch them. She is very intelligent and loves everything gross and slimy. She likes to test her limits to see if there is something that can make even her, the Queen of Squeam, turn green. So far nothing has come close, although she closely resisted gagging on a few occasions. The only exception was when she unknowingly drank contaminated water and threw up. Despite all of this, she is terribly afraid of leeches. She gets covered in slop the most, and being dirty has yet to affect her trademark ponytail. On the field, she is a competent fighter. She holds a severe grudge against not only villains like Lance Boil, but her school rival Paige. Unlike her younger brother Ty, she is athletic and participates in school sports like volleyball. Abby depends on her instincts and feelings at times, which occasionally clouds her judgment. She shares ownership of her beloved pet kitten, Hairball, with Ty.

Ty is Abby's younger brother and a hard kid to face. He is very intelligent, possessing a cool, active and analytical personality that takes everything in. He sees himself as a scientist and takes his job as a grossologist very seriously. His goal is to be remembered among the very best within the scientific community. He even owns a chemistry set and does analyses on things he finds (e.g. Hairball's hairballs). He and Lab Rat share many common interests. On the field, Ty pilots the GRS-1 and is great at strategic maneuvers. His quick thinking has saved the day many times. In fact, he is hinted to be the most intelligent of the team, being much smarter than Abby and even Lab Rat. He has a crush on Naomi, who eventually becomes his girlfriend later in the series.

* TheLancer

Tech support for the Bureau of Grossology, and a friend of Ty and Abby.

* NervousWreck: Every time when there's a situation going on, he gets nervous about the grossness of it.

* PestController

A bitter old sewer worker, who abnormally fused with a living slime mould while working in the sewers one day, becoming a strange giant slime creature with a ghoulish skull-like head seen inside. As he gets more powerful, he aims to cover the surface world with living slime molds.

* BlobMonster

A very filthy man who after discovering that a whiff of his stink was enough to render people unconscious, vowed to never let a drop of water, soap, or deodorant touch his skin again, and turned to an easy life of crime.

* JerkJock
* ThirdPersonPerson

* AnimalMotifs: Birds.

* EvilOldFolks
* GrumpyOldMan: To a villainous degree. He doesn’t like campers playing with electronic, so goes to great lengths to get rid of them.

Ty’s crush.

* MiniatureSeniorCitizen: He's much shorter than the other students.

* BigEater: Eats a lot of meat and other high-protein foods, which help fuel his burping abilities.

!!Major Characters

Once a successful Grossologist; however, he envied The Director's authority. Boyle tried to pull a coup, using a "prototype shrink-ray." Ty had tinkered with the weapon though, and Lance ended up blasting himself and shrinking in a somewhat lopsided manner (small body; large, misshapen, pus-filled head). Although horrified at first, Lance comes to be very proud of his boil. Banished from the team, he decided to use his skills for evil, with one goal in his twisted head revenge against all Grossologists, especially Abby and Ty.

* FaceHeelTurn: He was originally a Grossologist.

[[folder: Other Characters]]

A mad proctologist, who plots to engulf the world in a gigantic colon, starting with Ringworm Junior High School, to take revenge on people for unsympathetically making fun of him for his unfortunate surname. Has giant tapeworms as henchmen.

* {{Gasshole}}: Harvey becomes this in "It Ain't Over 'Til The Fat Man Sings", unaware that his burping is annoying to his wife and children.

She was once a promising young university student who wanted to study entomology (the study of insects) until she discovered how insects are treated by science: captured and dissected. Now, armed with all sorts of bugs, she pursues an insect agenda, to wipe all people off the planet so bugs can rule again.

Fifteen years ago, he was just an ordinary kid. That was until his older brother Gary tortured him by stuffing his brother under the bed sheets and farting in there. During those fifteen years, he became adapted to breathing the gases in farts. Like a fish being out of water, clean air is toxic for him, so he breathes toxic gases in a dome that he wears on his body. There was only one thing Fartor wanted... revenge on his brother Gary.

After discovering that a whiff of his stink was enough to render people unconscious, Joe vowed to never let a drop of water, soap, or deodorant touch his skin again, and turned to an easy life of crime. His plan: go from filthy, to filthy rich.

* GreenEyedMonster: Her motivation.

He was once a successful Grossologist; however, he envied The Director's authority. Boyle tried to pull a coup, using a "prototype shrink-ray." Ty had tinkered with the weapon though, and Lance ended up blasting himself and shrinking in a somewhat lopsided manner (small body; large, misshapen, pus-filled head). Although horrified at first, Lance comes to be very proud of his boil. Banished from the team, he decided to use his skills for evil, with one goal in his twisted head revenge against all Grossologists, especially Abby and Ty.

He is the custodian at Ringworm Junior High School. He is small, timid, shy, afraid of Paige, and wears oversized glasses. Always hums the song "4 and 20 Black Birds Baked In a Pie." He grew tired of cleaning up the excess pigeon poop around the school, so he built a giant mechanical owl suit, with which he captures pigeons and plots to put them in a pie to bake them.

After a science experiment mishap while trying to find a cure for foods going bad or rotting, young boy Chester gains the "rotting touch," with which he causes all organic materials to rot with a single touch, and also gives off a horrible smell. He becomes a new student at Ringworm Junior High School, and causes chaos upon his arrival, with a concerned Abby and Ty trying to cure him (Abby initially had feelings for him, much to Ty's suspicion). But Chester's rotting powers literally go to his head, giving him a twisted personality (even christening himself "Kid Rot"), and making him a formidable and diabolical foe for the Grossology team. Worse, he has a psychotic infatuation for Abby (who ultimately hates his prevalent Kid Rot persona), and will stop at nothing to win her heart, even going as far as to rot the entire world.

A mad proctologist, who plots to engulf the world in a gigantic colon, starting with Ringworm Junior High School (on the last day before its Summer vacation), to take revenge on people for unsympathetically making fun of him for his unfortunate surname. Has giant tapeworms as henchmen.

A giant monster made of nose mucus stolen by Sloppy Joe (using a suction gun), who simply wanted to make a "boogerman" with said mucus (much like a snowman). Abby and Ty confront Sloppy Joe, and in the process, inadvertently cause an electrical accident that brings the "boogerman" to life. The monster sucks mucus out of people's noses, and the more he consumes, the larger he gets.

* WeaksauceWeakness: Its only weakness is dirt particles (just like any mucus), which cause him to not only dry up, but decrease in size.

A gothic caped villain whose eyesight is accustomed to darkness, and therefore must wear dark glasses. He summons a huge flock of bats to drop guano on anyone who opposes him. As he cannot stand light, his ultimate plan is to plunge the city into eternal darkness

A lady whose DNA structure was crossed with that of plants. Has leaves and tendrils around her body. Plotted to use giant carnivorous plants to attack the city, and ultimately, the world.

Insectiva's twin sister. Unlike Insectiva, she loves arachnids, as her name suggests. She and Insectiva have had a bitter rivalry, and both pit their own respective arthropods against each other, with catastrophic results. She is the gothic version of Insectiva and her hairstyle is a big double-knob ponytail.

A kid with a pink eye. He is curious about Ty and Abby's extra-curricular activities, and thus sets off to find the truth about his classmates' secret identities, using various attempts to do so, but all of them end in failure. He eventually becomes a Grossologist, but he is fired/quits after his plan backfires with Lance betraying him.

* WeaksauceWeakness: Simple over-the-counter antacids can suppress his powers.

People call him the ultimate candy man, but he's just a crazy man with a big sweet tooth and a lot of rotten teeth. His plan is to make super tooth-rotting candy, pretending that they'll take care of your teeth, and distribute them to everyone, so he won't be the only one with a rotten mouth and a large craving for candy.

Tired of campers bringing their new electronic devices with them, Gundy uses mutated worms to scare away people from his lake.

* GrumpyOldMan: To a villainous degree.

* NoCelebritiesWereHarmed: Based on Music/OzzyOsborne.

!!Lance Boil
* BodyHorror: His head is a giant zit.
* MadScientist
* FaceHeelTurn: He was originally a Grossologist.

!!Insectiva
* AmazingTechnicolorPopulation: She has pale green skin.
* FriendToBugs: To the point where she wants bugs to conquer the planet.
* IWasQuiteTheLooker: Was quite beautiful during her days as a normal scientist.
* PestController

* FriendToBugs: To the point where she wants bugs to conquer the world.
* IWasQuiteTheLooker: Was quite beautiful during her days a normal scientist.

* Gasshole: After Fartor did the above.

[[WMG: Abby Archer]]

[[WMG: Ty Archer]]

* [[LittleMissBadass Little Mister Badass]]: Also a teenager and fights very well.

* {{Action Girl}}: She frequently brawls with villains during missions.
* {{Action Hero}}
* {{Enemy Mine}}: She once teamed up with Insectiva to get rid of a carnivorous plant-themed villain, since said villain threatened both of them.
* {{Genius Bruiser}}: She can fight with both her wits and knowledge ''and'' brute force; she's both [[StreetSmart street-smart]] and book-smart.
* {{Little Miss Badass}}: Perfectly capable of holding her own against even the most powerful of villains and is a teenager.
* {{Plucky Girl}}: Even when it seems like the end, she never gives up.

* {{Tomboyish Ponytail}}
* {{Why Did It Have To Be Snakes}}: She's very afraid of leeches, as shown in the episode "Vein Drain."

* {{Action Hero}}: Kicks just as much villain ass as his sister does.
* {{Brainwashed And Crazy}}: Fartor once did this to him so that he could use him for his geology skills.
* {{Gasshole}}: After Fartor did the above.
* {{Genius Bruiser}}: Hinted to be the most intelligent Grossologist on the team, and again, he does a lot of fighting too.

Ty is Abby's younger brother and a hard kid to face. He is very intelligent, possessing a cool, active and analytical that takes everything in. He sees himself as a scientist and takes his job as a grossologist very seriously. His goal is to be remembered among the very best within the scientific community. He even owns a chemistry set and does analyses on things he finds (e.g. Hairball's hairballs). He and Lab Rat share many common interests. On the field, Ty pilots the GRS-1 and is great at strategic maneuvers. His quick thinking has saved the day many times. In fact, he is hinted to be the most intelligent of the team, being much smarter than Abby and even Lab Rat. He has a crush on Naomi, who eventually becomes his girlfriend later in the series.