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1The character sheet for the Creator/{{Nelvana}} cartoon, ''WesternAnimation/{{Grossology}}''.
2
3[[foldercontrol]]
4
5!!Heroes
6
7[[folder:Abigail "Abby" Archer]]
8[[quoteright:230:https://static.tvtropes.org/pmwiki/pub/images/abbyarcher_9.jpg]]
9->Voiced by: Creator/KrystalMeadows, Karen Hines ("Oldie But a Goodie" only)[[labelnote:Other languages]]Creator/ShiraNaor (Hebrew)[[/labelnote]]
10
11One of the main characters, a tomboyish girl who 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.
12-----------
13* ActionGirl: She frequently brawls with villains during missions.
14* ActionHero: She and her brother regularly save the world from nausea-inducing villains using their wits and their trusty slime guns.
15* BadassAdorable: She's a cute 13-year-old girl who battles the world's grossest supervillains every episode.
16* EnemyMine: She once teamed up with Insectiva to get rid of a carnivorous plant-themed villain, since said villain threatened both of them.
17* FatalAttractor: Every (named) male she's expressed an attraction towards on the show has turned out to be a supervillain.
18* FieryRedhead: She has red hair, and tends to be more headstrong and temperamental than black-haired Ty.
19* GeniusBruiser: She can fight with both her wits and knowledge ''and'' brute force; she's both [[StreetSmart street-smart]] and book-smart.
20* TheLadette: Her tomboyish-ness and love of gross things helps her in her job though.
21* TheLeader: Out of the two siblings, she most likely to take the lead.
22* LittleMissBadass: Perfectly capable of holding her own against even the most powerful of villains and is a teenager.
23* PassionateSportsGirl: She tried out for her school's volleyball, AND basketball teams.
24* PluckyGirl: Even when it seems like the end, she never gives up.
25* {{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.
26* TeenGenius: Knows a lot about biology and anatomy.
27* TenderTomboyishnessFoulFemininity: The kind and heroic Tender Tomboyishness to Paige's snobby and selfish Foul Femininity.
28* TomboyishPonytail: A definite tomboy who wears her hair in a long ponytail.
29* WhyDidItHaveToBeSnakes: She's very afraid of leeches, as shown in the episode "Vein Drain".
30* YellowPurpleContrast: Her civilian outfit is primarily purple, and her Slime Suit is yellow.
31[[/folder]]
32
33[[folder:Tyler "Ty" Archer]]
34[[quoteright:288:https://static.tvtropes.org/pmwiki/pub/images/ty_7.jpg]]
35->Voiced by: Michael Cohen
36
37Abby's younger brother and the other main character. 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, and his goal is to be remembered among the very best within the scientific community.
38-------
39* ActionHero: Kicks just as much villain ass as his sister does.
40* BadassAdorable: A precocious teenage boy who battles disgusting supervillains and deals with gross situations on a daily basis.
41* BrainwashedAndCrazy: Fartor once did this to him so that he could use him for his geology skills.
42* {{Gasshole}}: When he was [[BrainwashedAndCrazy brainwashed]] by Fartor, he became this.
43* GeniusBruiser: Hinted to be the most intelligent Grossologist on the team, and again, he does a lot of fighting too.
44* TheLancer: Abby's brother and partner in the job.
45* [[LittleMissBadass Little Mister Badass]]: Also a teenager and fights very well.
46* TeenGenius: Just like his sister, he very knowledgeable in science, and implied to be the smartest in the team.
47[[/folder]]
48
49[[folder:Paul "Lab Rat" Squirfenhender]]
50[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_10_43_grossology__queen_for_a_day_ep_1_youtube.png]]
51->Voiced by: Creator/DevenMack (credited as M. Crystal Heywood)[[labelnote:Other languages]]Creator/PhilippeMartin (Canadian French}[[/labelnote]]
52
53Tech support for the Bureau of Grossology, and a friend of Ty and Abby. He is always accompanied by his pet rat, Hermes.
54------
55* ADayInTheLimelight: "Ask the Dust Mites" mainly focuses on him.
56* BasementDweller: He does nothing but sit around the lab all day, and some episodes note that he rarely ever goes outside. "Owl Be Back" reveals that this is actually due to a fear of the outdoors, though he gets better about it and goes outside to help the team in the field when it is absolutely necessary.
57* BlackAndNerdy: Rivals the siblings in the science department.
58* BlueIsHeroic: He wears all blue.
59* GadgeteerGenius: He often builds contraptions for Abby and Ty to use on their missions.
60* InkSuitActor: Concept art depicted him as a chubbier, shorter character before Deven Mack auditioned, redesigning him into a slimmer character of African descent. Supposedly, he even wore the same blue hoodie that became Lab Rat's trademark look.
61* LoyalAnimalCompanion: Hermes, his pet rat.
62* NeatFreak: Ironically for a guy who works for a crime-fighting bureau that specializes in “gross” crimes, Lab Rat is far less engrossed by gross and dirty things than Ty and Abby are, and "Stinko" specifically focuses on him and his germaphobia.
63* OnlyKnownByTheirNickname: He's rarely called by his first name.
64* TheSmartGuy: Well, all three of the kids are intelligent, but he's the one that does all the technical work.
65* TeenGenius: Just like Abby and Ty, he's a pretty smart guy and even builds most of the gadgets they use.
66[[/folder]]
67
68[[folder:The Director]]
69[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_14_25_grossology__queen_for_a_day_ep_1_youtube.png]]
70->Voiced by: Paul O'Sullivan
71
72The head of the Bureau of Grossology...who is ''entirely'' in the wrong profession.
73-------
74* {{Fartillery}}: In "Fart Side of the Moon", he out of all characters saves the day using a "powerful butt blast", due to his recent "bean-only" diet resulting in [[{{Gasshole}} rampant flatulence]].
75* NeatFreak: Even the ''slightest'' hint of anything gross will send him into a panic.
76* NervousWreck: Every time when there's a situation going on, he freaks out over the grossness of it.
77* PointyHairedBoss: Not exactly competent at his job and can be ditzy at times.
78* RunningGag: His squeamishness will be brought up OncePerEpisode.
79* SmallNameBigEgo: Occasionally tries to take credit for Ty and Abby's successes. This never works, though.
80* WrongLineOfWork: He's the director of an organisation dedicated to battling gross threats, but at the same time is also a squeamish coward.
81[[/folder]]
82
83!!Villains
84
85[[folder:Cara Chitin/Insectiva]]
86[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_18_02_grossology__queen_for_a_day_ep_1_youtube_2.png]]
87->Voiced by: Lili Francks
88
89Once 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.
90------
91* AlliterativeName: Her real name, '''C'''ara '''C'''hitin.
92* AmazingTechnicolorPopulation: She has pale greenish-grey skin, although it appears pale purple in dark areas.
93* EnemyMine: Had one with Abby to fight a villain that was threatening both of them.
94* EvilOldFolks: Has definitely aged a lot since her days as a university student.
95* FriendToBugs: To the point where she wants bugs to conquer the planet.
96* IWasQuiteTheLooker: Was quite beautiful during her days as a normal scientist.
97* GlasgowGrin: Appears to have this.
98* MeaningfulAppearance: During flashbacks to her childhood, her young self wears a bow in her hair that looks just like a butterfly.
99* MeaningfulName: Her real name is Cara Chitin. Chitin is a substance found in insects' exoskeletons.
100* PestController: Obviously.
101* RedEyesTakeWarning: Her eyes are different shades of red.
102* ScaryTeeth: Has sharp fangs, befitting for her creepy nature.
103* UnholyMatrimony: She falls in love with Sloppy Joe in "Pucker Up".
104[[/folder]]
105
106[[folder:The Slim Slime Man]]
107[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/slimslimeman_7.jpg]]
108->Voiced by: Creator/NeilCrone
109
110A bitter old sewer worker, who abnormally fused with a living slime mold 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.
111-------
112* BenevolentBoss: He treats his slime mold minions like a group of kindergartners, even telling them to pick a "surface buddy" for their invasion of the surface world.
113* BlobMonster: Part-man, part-slime mold.
114* GlowingEyesOfDoom: His eyes glow yellow.
115* SkullForAHead: A strange giant slime creature with a ghoulish skull-like head seen inside.
116[[/folder]]
117
118[[folder:Larry/Fartor]]
119[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_22_00_grossology__fartzilla_ep_3_youtube.png]]
120->Voiced by: Creator/SeanCullen
121
122Originally just an ordinary kid until his older brother Gary tortured him by stuffing his brother under the bed sheets and farting in there. For 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.
123-------
124* AmazingTechnicolorPopulation: Has blue-grey skin.
125* BenevolentBoss: His kind treatment of Ty even after brainwashing him into becoming his minion.
126* BodyHorror: He was normal human who mutated into a bloated, grey-skinned, methane-reliant monstrosity.
127* {{Fartillery}}: It's all in his name.
128* {{Gasshole}}: His abilities revolve around farting and he even breaths methane as a substitute for oxygen.
129* {{Gonk}}: Post-mutation.
130* PoweredArmor: He wears this to help him breath and fly around.
131* TragicVillain: His motivations are more out of spite over his condition than out of evil.
132* UsedToBeASweetKid: He used to be a normal kid named Larry, until his brother's constant Dutch Ovens caused him to mutate into Fartor.
133* WoobieDestroyerOfWorlds: Started out as a normal kid who suffered abused by his brother, now turned into a villainous abomination.
134[[/folder]]
135
136[[folder:Joseph "Sloppy Joe" Puglowski]]
137[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_25_19_grossology__the_perfect_stink_ep_4_youtube_6.png]]
138->Voiced by: Creator/GeorgeBuza
139
140An extremely dirty 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.
141-------
142* AmazingTechnicolorPopulation: Sickly greenish-yellow skin. Subverted as it's actually the filth coating him.
143* AmbiguouslyHuman: He looks more gorilla-like than human.
144* TheBrute: His large size and strength makes him a threat.
145* CutLexLuthorACheck: In "Sloppy Joe to Go", he opens his own restaurant, which quickly becomes popular. Despite this, his sole intent for the business is to provide portions so large that most of it gets thrown away, thus creating more garbage for him to enjoy.
146* FatBastard: Overweight and a nuisance to everyone around him.
147* FatSlob: He isn't called "Sloppy Joe" for nothing.
148* FreudianExcuse: As a child, his family was so poor that all they had to eat was dirt off the floor, but he always received plenty of gifts on Christmas. It made him feel so happy that he always tries to spread Christmas cheer so that others can feel the same way.
149* {{Gonk}}: Not exactly in the good-looking department.
150* NotSoHarmlessVillain: Most of the time he's more of an annoying petty criminal than actually dangerous, but it's shown that some of his actions ''can'' have disastrous consequences, such as in "Yack Attack".
151* ObliviouslyEvil: Occasionally he can fall into this. In "Yack Attack", he just wanted to go for a swim in his own quiet vacation spot. The problem is that his "vacation spot" was actually the city's water supply, and he was unknowingly passing his germs to everyone and making them extremely sick.
152* PetTheDog: Turns out he has a soft spot for Christmas, and genuinely tries to be cheerful and spirited in "Let Them Eat Fruitcake", even giving Abby a present.
153* ThePigPen: Sloppy Joe is covered filth and all of his plans tend to involve filth in some way.
154* UncleanlinessIsNextToUngodliness: No surprise there, since his gimmick is that he never bathes and uses his filth as a weapon.
155* UnholyMatrimony: He falls in love with Insectiva in "Pucker Up".
156* WeaksauceWeakness: Clean water or just taking a bath in general. While it doesn't really hurt him, he hates it and being sparkling clean will leave him with a VillainousBSOD.
157* WeaponizedStench: 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. He uses his extremely filthy body as his weapon.
158* YellowEyesOfSneakiness: Has yellow eyes, and is a criminal.
159[[/folder]]
160
161[[folder:The Scab Fairy]]
162[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_27_24_grossology__the_scab_fairy_ep_5_youtube.png]]
163->Voiced by: Jessica Holmes
164
165A crazed former beauty queen who was traumatized over a small cut to her shoulder, ending her career. Not seen since then, she used her exceptional degree in dermatology and mythology to create a high-tech dragonfly-winged suit made of scabs, and takes the identity of the Scab Fairy, based on a Tooth Fairy-like myth figure that collects scabs (rather than teeth). She is armed with a high-tech wand that removes scabs from people's wounds, and inflicts them on others. Her ultimate obsession is to inflict scabs on anyone pretty, as revenge for the loss of her old beauty queen career.
166------
167* AttentionWhore: A crazed beauty queen who wants to inflict unattractive scabs on people who are more beautiful than her.
168* BeautyIsNeverTarnished: Her entire character revolves around averting this.
169* ClothesMakeTheSuperman: Her flying suit made of scabs gives her superpowers.
170* FauxAffablyEvil: She often acts like a sweet and giggling fairy, but in reality she's evil and vindictive.
171* GreenEyedMonster: Her motivation is jealousy.
172* PinkMeansFeminine: Her suit is pink.
173[[/folder]]
174
175[[folder:Lance Boil (Boyle)]]
176[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_35_49_grossology__when_ya_gotta_go_ep_6_youtube.png]]
177->Voiced by: Creator/JuanChioran
178
179Once 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, causing himself to shrink and his head to turn into a giant boil. Banished from the team, he decided to use his skills for evil, with only one goal in his twisted head: revenge against all Grossologists, especially Abby and Ty.
180-------
181* BaldOfEvil: Well, your head turning into a boil can do a number on your hair.
182* BeardOfEvil: He has a goatee.
183* BigBad: He is the most recurring villain in the series, as well as the Bureau of Grossology's most prevalent enemy, with him wanting to take revenge on them for being fired.
184* BodyHorror: His head is a giant zit.
185* EvilLaugh: Parodied. At one point he forgot to laugh maniacally, and promptly does so.
186* FaceHeelTurn: He was originally a Grossologist.
187* GreenEyedMonster: He was always jealous of the Director's authority, believing himself to be much more competent than him. Though to be fair, [[NeatFreak the Director]] was never exactly the best choice for the job.
188* TheGrinch: He tries to ruin Christmas in "Let Them Eat Fruitcake".
189* HoistByHisOwnPetard: "New Recruits" reveals his mutation was the result of his own shrink-o-matic gun going off in his face. This is attributed to Ty having fiddled with it earlier but failing to put back all the parts.
190* IWasQuiteALooker: Used to be tall and handsome.
191* MadScientist: For example, creating a ray gun that causes nasty diarrhea.
192* TheNapoleon: Lance Boil is incredibly short in stature. Despite this, he is the Bureau of Grossology's most reviled enemy.
193* NeverMyFault: In "Pinkeye and the Brain". After he recounts past encounters with Abby and Ty, Roger notes that the duo beat him every time. Lance irritably denies this, claiming that Abby and Ty "just get very, very lucky at the last minute".
194* PottyEmergency: Suffers one after getting hit by his own ray gun that causes diarrhea.
195* TheResenter: His FaceHeelTurn was motivated by thinking he deserved the Director's job and feeling threatened by the arrival of two young and eager recruits. Some of his schemes (particularly the "Pinkeye's Revenge" two-parter) are explicitly devoted to claiming what he considers his rightful place and knocking those he think outdid him down a peg.
196* TallDarkAndHandsome: Was this pre-mutation.
197* YourHeadAsplode: His head has "popped" on a few occasions, and the results look as pleasant as they sound.
198[[/folder]]
199
200[[folder:Keith "V.K." Van Kobbler]]
201[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_40_24_grossology__its_gotta_be_the_shoes_ep_9_youtube.png]]
202->Voiced by: Creator/PatMastroianni
203
204A popular and undefeated young basketball player, and Abby's former idol. Endorsed the "KVK-1" brand super-sneakers, with a twisted method behind his fame; he single-handedly manufactured the KVK-1 sneakers for mass consumption, and spiked them with fungus (while wearing a non-spiked "Deluxe Edition" pair for himself, of course), so that everyone will have foot fungus, and most of all, eliminate the competition, so that he will be the only basketball player in the world.
205-----
206* AttentionWhore: Craves even more popularity to the point where he's willing to sabotage other basketball players.
207* BondVillainStupidity: He puts Abby and Ty on a conveyer belt heading towards a vat of concentrated foot fungus, but leaves before they fall in so he can go to a statue unveiling; naturally, they escape and go after him.
208* BrokenPedestal: Abby was originally a fan of him before discovering his villainy.
209* JerkJock: A famous basketball player and a villain.
210* ThirdPersonPerson: He talks like this.
211[[/folder]]
212
213[[folder:Mr. Fowler]]
214[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_42_18_grossology__owl_most_foul_ep_10_youtube_7.png]]
215->Voiced by: Creator/DerekMcGrath
216
217The custodian at Ringworm Junior High School. 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.
218------
219* AnimalMotif: Owls.
220* ButtMonkey: Constantly has to clean the pigeon poop. This eventually lead to him getting revenge.
221* EvilOldFolks: A notably tragic example, as he was initially a kindly handyman who was driven to madness and villainy by Paige's demands that he solve the school's pigeon problem by himself. He's so far gone by the time of his only episode that he's built a robotic owl to capture and ultimately cook the pigeons.
222* GadgeteerGenius: He has a giant owl mech that he built himself.
223* InsistentTerminology: He is 'not' a janitor. He is a 'custodial engineer'. Which he points out means his job is to fix things, not clean them.
224* MiniatureSeniorCitizen: He's much shorter than the students.
225* NervousWreck: He's terrified of Paige, and has the delusion that the pigeons are intelligent and out to get him.
226* NerdGlasses: He has round, oversized glasses.
227[[/folder]]
228
229[[folder:Chester/Kid Rot]]
230[[quoteright:341:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_45_30_grossology__kid_rot_ep_13_youtube_3.png]]
231->Voiced by: Travis Ferris
232
233A teenager who, after a science experiment mishap while trying to find a cure for foods going bad or rotting, 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. 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.
234-----
235* AbortedArc: By the end of the episode "''The King of Rottingham Forest''" Ty and Abby presume him dead, though the audience is shown he's still alive, heavily implying his eventual return. Despite this and him appearing in a group shot of villains in the season 2 intro, he never appears or is referenced again.
236* AllOfTheOtherReindeer: He is bullied in school.
237* MakeThemRot: His rotting powers.
238* TheNudifier: As this is a kid's show, the closest he's gotten to using his powers on a person is by rotting clothes made with organic material.
239* SuperPoweredEvilSide: His alter-ego, Kid Rot, overpowers him.
240* VillainousCrush: He has a crush on Abby as both Chester and Kid Rot, though it's ''far'' more pronounced with the latter. Abby herself seems to have a thing for Chester, but loathes his Kid Rot persona.
241* WalkingWasteland: Everything he touches rots.
242[[/folder]]
243
244[[folder:Dr. Cornelius Colon]]
245[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_47_30_grossology__schools_grossed_out_for_summer_ep_18_youtube_6.png]]
246->Voiced by: Creator/PeterKeleghan
247
248A 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 [[EmbarrassingLastName unfortunate surname]]. He has giant tapeworms as henchmen.
249-----
250* AttackAnimal: Has these in the form of giant intestinal parasites.
251* MadScientist: A typical one, all boiling down to the wardrobe, weird experiments, and MorallyAmbiguousDoctorate.
252* MorallyAmbiguousDoctorate: He uses his knowledge in proctology to aid in his plan.
253* UnfortunateName: Resulting in his StartOfDarkness.
254[[/folder]]
255
256[[folder:Frankenbooger]]
257[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_50_35_grossology__lights_out_ep_23_youtube.png]]
258
259A 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.
260-------
261* BlobMonster: Made entirely out of snot.
262* WeaksauceWeakness: Its only weakness is dirt particles just like any mucus, which cause him to not only dry up, but decrease in size.
263[[/folder]]
264
265[[folder:Darko Crevasse]]
266[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_51_38_grossology__boogerman_ep_24_youtube.png]]
267->Voiced by: Creator/JulianRichings
268
269A gothic caped villain whose eyesight is accustomed to darkness. 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.
270------
271* AnimalMotif: Bats.
272* DarkIsEvil: His entire theme.
273* EeriePaleSkinnedBrunette: Has the vampire look, and is definitely eerie to boot.
274* {{Goth}}: Paige referred to him as one, though he takes offense to it.
275* NoCelebritiesWereHarmed: Based on Music/OzzyOsbourne.
276[[/folder]]
277
278[[folder:Sarah Senia]]
279[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_54_20_grossology__heave_it_or_leave_it_ep_26_youtube_2.png]]
280->Voiced by: Creator/JayneEastwood
281
282A lady whose DNA structure was crossed with that of plants. Plotted to use giant carnivorous plants to attack the city, and ultimately, the world.
283-----
284* AmazingTechnicolorPopulation: Green, due to her being a plant naturally.
285* PlantPerson: She is part-human, part-plant.
286[[/folder]]
287
288[[folder:Arachnidia]]
289[[quoteright:324:https://static.tvtropes.org/pmwiki/pub/images/zzzzzzzjyhuygyyyyu.jpg]]
290->Voiced by: Maria Vacratsis
291
292Insectiva'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.
293-----
294* AnimalMotif: Spiders, of course.
295* IWasQuiteALooker: Like her sister, she was pretty cute as a kid.
296* PestController: Just like her sister, though this time she controls arachnids like spiders.
297[[/folder]]
298
299[[folder:Frederick Follicle]]
300[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_14_02_52_grossology__hairless_whispers_ep31_youtube_4.png]]
301->Voiced by: Creator/StephenOuimette
302
303A hair dresser who doesn't like to change styles. After getting kicked out of a job, he went underground doing biological experiments, and ended up with living hair.
304-----
305* MadScientist: A biochemist whose experiments cause his hair to gain superpowers.
306* PrehensileHair: He uses his hair as a weapon.
307[[/folder]]
308
309[[folder:Roger Pink-Eye]]
310[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_14_06_34_grossology__pussed_off_ep35_youtube.png]]
311->Voiced by: Creator/LyonSmith
312
313A kid with bacterial conjunctivitis. 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 that ultimately end in failure. He eventually becomes a Grossologist, but he is fired/quits after his plan backfires with Lance betraying him.
314------
315* AintTooProudToBeg: Resorts to begging and crying in order to get Ty and Abby's secret identity from Lance Boil.
316* ButtMonkey: Let's see; he's generally regarded as a loser, is constantly called by an EmbarrassingNickname, had his room completely trashed (multiple times), almost died from black mold exposure, trampled on by jocks, had his camera destroyed, forced to beg for the info he wants, driven to tears, locked in a cage, betrayed, and kicked out of a top-secret organization. And that was all within ''five episodes''[[note]]"Mold Monster", "When Allergies Attack", "Pinkeye and the Brain", and "Pinkeye's Revenge" (both parts)[[/note]].
317* ChildishToothGap: A 12-ish year old kid with a missing front tooth.
318* EarlyBirdCameo: He first appeared as one of the students in the bathroom line in "Flushed Away"[[note]]Episode 28[[/note]], before being properly introduced with a name and purpose in "Mold Monster"[[note]]Episode 33[[/note]].
319* EarlyInstallmentCharacterDesignDifference: In his EarlyBirdCameo in "Flushed Away", his left eye was infected. In all subsequent appearances, it's his right eye instead.
320* EmbarrassingNickname: Being called "Pinkeye" is not something he's proud of; in "Pinkeye and the Brain", he even cries about it.
321* EyeScream: His diseased right eye.
322* FieryRedhead: An eccentric redhead.
323* NamedAfterTheInjury: Is called Pinkeye by his peers because of his [[EyeScream bacterial conjunctivitis]]. He is [[EmbarrassingNickname not the least bit pleased about it]].
324* SpeechImpediment: Has a lisp.
325** However, it's rather inconsistent, notably in "Pinkeye and the Brain", where he begs Lance Boil to "tell me Ty and Abby's thecrets, please, pleath".
326* TrademarkFavoriteFood: He has an affinity for cheese; experimenting on it, that is.
327[[/folder]]
328
329[[folder:Basso Profondo]]
330[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_14_12_23_grossology__aint_over_till_the_fat_man_sings_ep39_youtube.png]]
331->Voiced by: Creator/BenedictCampbell
332
333A disgraced opera star, who was once part of the Three Baritones. He's back for revenge, but this time he's singing a whole new tune; in other words, he's now a burping star.
334-----
335* BalloonBelly: Turns out that Basso is obese because of all the gas built up inside him.
336* BigEater: Eats a lot of meat and other rich foods, which help fuel his burping powers.
337* EvilSoundsDeep: Has a baritone voice, though it's noticeably higher when he's skinny.
338* FatBastard: Though he's actually just bloated, rather than fat.
339* FatSlob: If his powers didn't already tip you off, his eating habits are disgusting as well, gorging nonstop on greasy foods and his shirt even being covered in grease stains.
340* KarmaHoudini: His episode ends with him running away, presumably getting away scott-free with his destruction and havoc.
341* JabbaTableManners: He is shown pigging out when Mr. Archer meets him at the auditorium.
342* {{Jerkass}}: He is extremely rude to Mr. Archer even after the latter stated he was a huge fan of his.
343* {{Gasshole}}: His burping abilities.
344* {{Gonk}}: He's by no means pleasant-looking, even before getting extremely big.
345* MakeMeWannaShout: His sonic belches serve as this, even being able to shatter glass.
346* OminousOperaCape: Naturally, due to him being an opera singer.
347* VillainousGlutton: Constantly stuffs himself with meat and cheese which results in severe gas, and is completely unwilling to share his food with other people.
348[[/folder]]
349
350[[folder:Gary Gumdrop]]
351[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_14_16_03_grossology__candy_isnt_dandy_ep40_youtube.png]]
352->Voiced by: Creator/AdrianTruss
353
354A 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.
355----
356* AxCrazy: In addition to evil, he's also downright insane.
357* CorruptedCharacterCopy: He's basically supervillain [[Literature/CharlieAndTheChocolateFactory Willy Wonka]].
358* EvilOldFolks: Quite old and decrepit-looking.
359* ScaryTeeth: His jagged, rotten teeth give off this impression.
360* SinisterSweetTooth: Likes candy so much he's willing to steal it to get his next sweet tooth fix. However, as a result of his candy obsession, his teeth are all rotten and he occasionally spits one out. Bitter at the next generation's healthy teeth, he invented the "Gary Gumdrop" persona and began giving out candy laced with concentrated gingivitis bacteria.
361[[/folder]]
362
363[[folder:Gundy [=McGoober=]]]
364[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_14_23_01_grossology__squirm_ep42_youtube.png]]
365->Voiced by: Bruce Pirrie
366
367An old man running a campground who is tired of campers bringing their new electronic devices with them, so he uses mutated worms to scare away people from his lake.
368----
369* GrumpyOldMan: To a villainous degree. He doesn't like campers playing with electronics, so goes to great lengths to get rid of them.
370* WellIntentionedExtremist: He only wants to get rid of the "city folks" because of how disruptive they are, although scaring them away is probably a bit too much.
371[[/folder]]
372
373!!Misc. Characters
374[[folder:Paige Logan]]
375[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/paige_better_pic.png]]
376->Voiced by: Creator/MelissaAltro
377
378Abby's snobbish and popular rival at school.
379-----
380* AlphaBitch: She is quite mean to Abby and generally acts rude to everyone.
381* BeautyIsNeverTarnished: Averted. Despite being the snobbish and prudish AlphaBitch, she is still prone to gross things like farting.
382* TheChewToy: Frequently falls victim to embarrassing and gross mishaps, but they're almost always deserved.
383* DumbBlonde: In addition to her snotty behavior, she can also be naïve.
384* GirlyGirlWithATomboyStreak: Despite being a girly AlphaBitch, she enjoys sports such as basketball and even challenges Abby to a chocolate shake-drinking contest in one episode.
385* GirlPosse: She has two syncophants who blindly follow her around.
386* PinkMeansFeminine: She wears all pink.
387* SuddenNameChange: She was referred to as "Paige Parmington" in "The Scab Fairy".
388* TenderTomboyishnessFoulFemininity: The snobby and selfish Foul Femininity to Abby's kind and heroic Tender Tomboyishness.
389* WithFriendsLikeThese: Frequently orders around and berates her posse. She mentions in "Ask the Dust Mites" that she is quite prone to scapegoating friends for her actions and getting new friends afterwards.
390[[/folder]]
391
392[[folder:The Detective]]
393[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_14_30_15_grossology__queen_for_a_day_ep_1_youtube.png]]
394->Voiced by: Creator/DannyWells
395
396A gruff, burly police detective, who occasionally works with Abby and Ty on cases, and is the only outsider who knows their secret.
397-----
398* TheBigGuy: He towers over Ty and Abby, and serves this role in their investigations.
399* ConspiracyTheorist: A firm believer in the SewerGator UrbanLegend.
400* ADayInTheLimelight: "Flushed Away" has him more directly involved in the case, giving insight into his personality and his unique approach to police work.
401* ItsPersonal: He insists on solving the case in "Flushed Away" by himself for this reason. He flashed a baby gator in his youth and thus feels this situation is something he must atone for.
402* NoNameGiven: He is only known as "The Detective".
403[[/folder]]
404
405[[folder:Naomi]]
406[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/bandicam_2017_01_12_11_59_45_820.png]]
407->Voiced by: Creator/LaurenCollins
408
409Ty's crush, and later his girlfriend.
410----
411* BespectacledCutie: An adorable girl with big glasses.
412* TheCutie: A very cute and friendly girl.
413* DelicateAndSickly: While she doesn't fully lean into being a SicklyNeuroticGeek, in "When Allergies Attack" she reveals that she has a long list of food and airborne allergies.
414* NiceGirl: There isn't a mean bone in the girl's body.
415* OfficialCouple: Becomes this with Ty eventually.
416[[/folder]]
417
418[[folder:Harvey and Petunia Archer]]
419[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/2019_04_10_13_24_57_grossology__the_perfect_stink_ep_4_youtube.png]]
420->Harvey voiced by: Creator/RichardBinsley
421->Petunia voiced by: Karen Hines
422
423Abby and Ty's father and mother, respectively. Both are shown to be gullible, and as such, are completely unaware of their children's secret jobs as Grossologists.
424----
425* BumblingDad: Harvey can be this at times.
426* BunnyEarsLawyer: Despite Harvey's goofiness, he works at a water treatment center and seems to know his stuff. Same for Petunia and her job as an entomologist.
427* TheDitz: Both of them are not exactly bright.
428* {{Gasshole}}: Harvey becomes this in "Ain't Over 'Til The Fat Man Sings", unaware that his burping is annoying to his wife and children.
429* ParentalObliviousness: They are completely unaware that their kids are out doing dangerous spy missions.
430* StrongFamilyResemblance: They both look eerily similar to their kids.
431* WhyDidItHaveToBeSnakes: Petunia is afraid of heights.
432[[/folder]]
433
434[[folder:Mr. Scheffer]]
435->Voiced by: Chad [=DeRohgth=]
436
437An often nervous and uptight teacher at Ringworm Junior High School.
438------
439%%* SternTeacher
440[[/folder]]

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