Main Characters | Minor/Recurring Characters | Major/Recurring Villains | One-Scene Characters/One-Shot Minor Characters
Minor Villains: Season 1 | Season 2 | Season 3 | Season 4
A shadow of an evil old rich man who passed away, thus letting him roam free. After becoming free he haunts the basement of Courage's Home, but secretly has a passion of becoming a Star.
- Dark Is Not Evil: He likes scaring people, but doesn't actually do anything malevolent.
- Heel–Face Turn: Once making peace with himself and Courage, he flies into space to join "the stars".
- Impossible Shadow Puppets: He makes silhouettes of Muriel getting subjected to Family-Unfriendly Violence (ranging from tearing her head off, being burned while tied to a stake, having her limbs torn off with strings, and having a spiked piston descend towards her) to scare Courage.
- Literal Metaphor: He at first mentions he means Star as in a celebrity. But when Courage suggests becoming the shadow of a real star, he accepts.
- Living Shadow: He gained a life of his own, after the human he was attached to died.
- Mind Screw: Some of the forms he takes are him attempting this on Courage.
- Peek-a-Bogeyman: The first thing he did once he became free was scaring people until he decided that pranking is not what he really wanted to be.
- Villainous Breakdown: Flies into a comical meltdown after Courage keeps flashing lights at him.
- Voluntary Shapeshifting: Shadows are after all immaterial, so it makes sense that he can take on different forms.
A big, hairy, misunderstood monster who needed Courage's help to evade an angry mob.
- The Big Guy: To Courage, once they finally become friends.
- Bigfoot, Sasquatch, and Yeti: He's Bigfoot.
- Dark Is Not Evil: Not a bad guy at all, just a misunderstood monster.
- Ear Ache: At the end of the episode he appears in, after Eustace is chased away by the angry mob, Bigfoot's dragged away by his mom this way while she's lecturing him about wandering away from home.
- Fluffy the Terrible: According to his "mother", his name is Theodore.
- Gentle Giant: He seems to have the mentality of a young child and clearly doesn't mean any harm.
- Not Evil, Just Misunderstood: Everyone assumes he's a threat because he's a big hulking sasquatch. But he's just scared, hungry, and wandered off from home.
- Raised by Humans: He was apparently raised by, or at least now lives with, an old human woman who considers him to be her son.
- Strange Minds Think Alike: Apparently, he and Courage both had the instinct to hula dance when they get accidentally dressed in fruit. This is actually how they become friends.
Two brother ducks who come to Nowhere. They are on a mission to find their third brother. One of the two tends to lay eggs, the other gets annoyed by this.
- Alien Abduction: They kidnap Muriel and Eustace to attach mind control helmets on them.
- Aliens of London: Even though they're aliens they inexplicably have Liverpudlian accents making them sound just like Ringo Starr.
- Amazing Technicolor Wildlife: They are blue-feathered alien ducks.
- Anti Villains: Type IV, they never meant any harm in putting Muriel under mind control, they just wanted to free their brother so badly. In the end, Courage even lets them control him to get their brother back.
- Character Catchphrase: (laid egg) "I told you to stop doing that."
- Didn't Think This Through: When they try to free their brother, their first plan is to kidnap and control Muriel, making them look evil to Courage. When they finally explain their motives to him and how they never meant to hurt anyone, Courage asks them why they didn't just ask for help. This causes the two brothers to argue with each other over whether one of them suggested they just ask for help or not.
- Egg-Laying Male: Hilariously demonstrated. One of the duck brothers constantly lays eggs much to the intense chagrin of his other brother who asserts that shouldn't be possible due to being males and constantly demands he cut it out. At the end of the episode, all three brothers lay eggs much to the dissenting brother's displeasure.Duck Brother #1: I told you to stop doing that! Besides, we don't lay eggs! We're duck brothers!Duck Brother #2: Stop telling me what to do!
- Evil Brit: Subverted. They're not evil, they just want to get their brother back. Being extraterrestrials, they're not really British either.
- Feathered Fiend: Although they're at first antagonistic towards Courage, this is subverted by their sympathetic motives, and they had no intentions of any actual malice.
- Intelligent Gerbil: They're aliens explicitly described as ducks, have an egg-laying habit despite being male and they want to rescue their brother from a military base...where he's being kept in the kitchen to be prepared as a meal.
- Jerk with a Heart of Gold: They may argue, but deep down they really care about each other.
- Mind Control: They use helmets to control Muriel, Eustace, and Courage (although willingly for Courage's case).
- Mister Seahorse: All of them tend to lay eggs despite being male. They also repeatedly lampshade their own confusion about it.
- No Celebrities Were Harmed: Their voices are imitations of Ringo Starr from The Beatles. In fact, the impression was so spot-on that a lot of people actually thought it was Ringo Starr voicing the Duck Brothers.
- Sibling Team: It is shown that they work together as much with the third one as with each other. Not that the team is without it problems.
- Solid Gold Poop: The eggs one of them keeps laying at least seem to be pure gold.
A grotesque hunchbacked man with a heart of gold who visited the Bagges one night.
- Amazing Technicolor Population: He's a dark green color, which clashes with his red hair.
- Beware the Nice Ones: He'll put up with any abuse directed towards himself with nary a complaint, but go after someone he's befriended and all bets are off. He gives Eustace a devastating "The Reason You Suck" Speech about his bullying behavior after having endured it for most of the episode, but finally loses it after seeing Courage be bullied one time too many.
- Expy: Is a walking Shout-Out to The Hunchback of Notre Dame, right down to being a bellringer as a hobby.
- Face of a Thug: Hideously ugly to look at, but far from being a bad person.
- The Grotesque: He's exaggeratedly ugly, but his sheer goodness and good-natured enthusiasm propel him into still being kind of endearing.
- Lame Comeback: When Eustace tries to bully him by coming up with all sorts of insulting words to describe his face, he "retorts" by simply, and repeatedly, pointing out Eustace's baldness. Amusingly enough, he still ends up winning the exchange due to Eustace being so thin-skinned and insecure about his dome.
- Nice Guy: In fact, one of the nicer characters Courage has met in the entire series. He also holds the distinction of being the only character besides Muriel to stand up to Eustace on Courage's behalf.
- Renaissance Man: He's a musician, an acrobat, and a shadow puppeteer.
- Walking the Earth: His way of living. He leaves the Bagge farm with good feelings seeing that there are still kind people out there.
A chef and owner of a hamburger restaurant. It seems that the meat he cooks with is made out of customers who have previously visited the place... at first glance.
- Ambiguously Evil: Even when it's revealed he's not really eating people, it's intentionally left ambiguous whether he wants to make a sculpture of Courage or actually use him for meat.
- Barefoot Cartoon Animal: He doesn't wear shoes.
- Bilingual Bonus: "Jeanbon" is a pun on "jambon," which means "ham" in French.
- Demoted to Extra: After his first initial appearance, he's limited to minor background roles.
- Happily Married: He is shown to have a wife whom he loves dearly, though she only appears in his debut episode.
- Meaningful Name: It's kind of appropriate that a pig chef's name would be a play on the French word for "ham".
- Nice Guy: A friendly host to his customers, even if he can be pretty creepy. He even feeds Courage at no charge and gives Eustace an extra hamburger on the house. Courage is just too freaked out to appreciate the gesture.
- Not Evil, Just Misunderstood: Courage's over-active imagination makes him think he's a man-eater. Except he's not, and just a kind-mannered but somewhat creepy cook with a passion for making meat sculptures with his wife.
- Pig Man: He and his wife are talking, bipedal, human-sized pigs.
- Sinister Swine: Ultimately subverted. Despite Courage's initial suspicions, he was never killing or cooking his own customers into food.
- To Serve Man: This gets subverted. It seems like he's cooking his human customers into food at first, but he's just making very realistic sculptures of them.
- The Unsmile: Jean Bon is a big, friendly fellow who always puts on his best smile to try and put his customers at ease. Unfortunately, said "best smile" comes across more like an evil, predatory grin, much to the unsettlement of Courage and the audience, even though Jean Bon really doesn't mean any harm.
A magical tree that granted whatever the person near it wished for from its branches that grew near the Bagges once... until Eustace cut it down out of jealousy.
- Benevolent Genie: He can give Courage and Muriel anything they want.
- Does This Remind You of Anything?: A wise, miracle-working teacher is killed but promises to return in three days, similar to The Gospels.
- Face Death with Dignity: He knows that Eustace will chop him down, but he doesn't look or act very worried about it.
- Literal Genie: Eustace says that he wishes that Muriel had a bigger head while going through his rant about the Tree. Guess what Muriel gets.
- Make a Wish: He has the power to grant wishes. And usually does a good job of it.
- Synchro-Vox: His mouth is live-action, while the rest of him is animated.
- Wise Tree: He's a talking tree who, besides granting wishes, gives advice to Courage.
A large, green eel-like creature that Courage summons up by pouring a bag of powder into the water-filled moat he digs around the Magic Tree to protect it from Eustace.
- Angry Guard Dog: Well, more like an Angry Guard Eel in his case, but he still serves the role of a ferocious beast that provides security against intruders. The way he attacks Eustace is even similar to the way a hunting dog violently shakes prey caught in its mouth.
- Beautiful Singing Voice: Rather surprisingly, the Eel enjoys singing the Irish folk song "Danny Boy", and does so with a very pleasant tone. At one point, he even sings a verse together with Eustace... before he resumes mauling him.
- Benevolent Monsters: Downplayed. He's relatively benevolent for a monster in this show, as he's allied with Courage and actively aids his defense of the Magic Tree. On the other hand, he's still quite aggressive to anyone near by, like when he immediately tries to take a bite out of Courage as soon as he's summoned. And that's nothing to say of trespassers like Eustace, who will get chomped and mauled.
- Covers Always Lie: The picture of the Instant Eel on the powder bag looks much, much friendlier than it actually is.
- Sea Monster: A rather smaller-scaled version of this trope, being a ferocious fish creature that lurks in a small freshwater moat, which looks more like a circular pond than a "sea". He looks to be roughly human-sized, so while he's not that huge, that's still rather big for an eel.
- What Happened to the Mouse?: As he basically only exists to be a joke character for a few gags, he just stops appearing not long before Eustace's conflict with Courage and the Magic Tree is over.
Nothing is much known about the character herself, but her one-off appearance in "Big Stinkin' City" is one of those sights a Courage fan never forgets. From the back, she looks like a normal girl playing Violin (Though even this is considered Uncanny Valley considering everything else around is animated). But when she turns around, she has a scary-looking claymation face that cranks up the Uncanny Valley as there's realistic looks, animated background, and claymation all in one spot. Though it seems that the girl's face is not always like that, as she appears normal on a television that Eustace is watching later in the episode.
- Creepy Child: She is a girl who turns around to reveal a horrifying face. She might as well do this to scare away visitors.
- Demon Head: Really catches you off guard the first time you see it... (Especially if most likely as a kid you haven't seen headturn scares before). Though interestingly subverted when she appears in the same episode again on Eustace's TV with a normal girl's face.
- Eye Pop: Her eyes bug out and wiggle.
- Face-Revealing Turn: This was many a kid's first introduction to these kinds of jumpscares.
- Fish Eyes: They bulge!
- Humanoid Abomination: Though not always like this, because later on she is shown with a normal face on Eustace's TV.
- Jump Scare: She turns around to reveal a horrific face without warning, making her one of the most notable instances where the show scared the audience with the sudden appearance of a scary sight.
- Nightmare Face: Makes a frightening face when scaring away Courage.
- The Spook: To add to her disturbing nature, there are no explanations for who she is and what she's doing there.
- Early-Bird Cameo: A banana person is among the creatures shown in the opening of the show's first season, but none of them would appear until the second season.
- Irony: They have a ruler called the Banana-Llama who turns out to be a monkey playing them so he can eat them.
- Plant People: Like the eggplants, they are anthropomorphic fruits after all.
- Ridiculous Future Inflation: As Eustace finds out:Eusace: "$8,000,000 for a salami?!"
A strange banana man who is basically a drug dealer, except he sells banana suits instead of drugs.
- Character Catchphrase: "C'mere—I got somethin' for ya."
- The Cameo: He is seen selling top secrets in "Katz Under the Sea".
- Conspicuous Trenchcoat: He wears a gray trenchcoat.
An insane, tiny, old lady with an obsession with lint. Doc Gerbil performed an experiment on her which gave her plungers for arms and legs, though she can still grab things with the suction cups.
- Amazing Technicolor Population: Her skin is blue.
- Ax-Crazy: It's clear that her isolation has taken its toll on her sanity.
- Character Catchphrase: "IT'S MINE! ALL MINE!"
- Cloud Cuckoo Lander: Obsessed with owning all the lint in Doc Gerbil's vacuum cleaner.
- Fiery Redhead: She has red hair and is very aggressive.
- Lantern Jaw of Justice: Like many characters in the show, she has one.
- Large Ham: "IT'S MY LINT! YOU DON'T TOUCH MY LINT! IT'S MINE! ALL MINE!"
- Laughing Mad: She laughs hysterically and is implied to have gone mad from being confined for so long by Doc Gerbil.
- Noodle People: Her torso and limbs are thin and wiry.
A singing sea serpent.
- Cyclops: She has a single large eye.
- Dark Is Not Evil: All she really wanted was for someone to listen to her sing. Her "attack" on the boat could also be seen as merely playing, as she doesn't seem to intentionally cause damage. And once Muriel and Courage have listened to her sing, she tows them back up the river.
- Early-Bird Cameo: She is among the monsters and villains seen in the first season's opening, but doesn't actually appear within the series until the second season.
- Gentle Giant: A monstrous river serpent with a love and passion for opera.
- Meaningful Name: She sings the signature aria from the opera Carmen.
- Sea Monster: She's a massive red sea serpent with one eye.
- Vocal Dissonance: A big and scary sea monster who also happens to have a beautiful voice.
Small creatures who live in colonies of coral that Courage and Bagges encounter when they go snorkeling. Their coral is apparently a popular material for wigs which Mama Bagge wishes to acquire, even if it means destroying their homes. Though Courage will have none of that.
- Accessory-Wearing Cartoon Animal: The Mayor wears a hat and a necktie while the small, female coralite has a bow.
- Big Eater: The girl coralite can eat a whole pie (which, to her, is gigantic) in about two seconds.
- Lilliputians: A race of very tiny people.
- Ridiculously Cute Critters: They're Smurf Expys, so naturally they'd be adorable little people, but the little Coralite Girl really takes the cake.
- Trademark Favorite Food: They really like eating pie.
Leonardo da Vinci's painting The Mona Lisa brought to life by the planets aligning over the Louvre Museum, when the Bagges were visiting Paris.
- Curtains Match the Window: Just like the real painting, she has brown hair and eyes.
- Mona Lisa Smile: The famous smile of the Trope Namer is present.
- Nonstandard Character Design: Due to being modeled after the actual painting, her appearance is more realistic than the other characters on the show.
Auguste Rodin's sculpture The Thinker is also brought to life by the circumstances above. He becomes the unwitting target of Mona's affection.
- The Ditherer: Constantly can't make up his mind, voicing aloud arguments in his head. This eventually exasperates Mona Lisa to the point she leaves him. He is last seen still figuring out what to eat in the Nighthawks painting.
- Nonstandard Character Design: Due to being modeled after the actual statue, his design is more realistic than the other characters on the show.
- Oblivious to Love: Because he's too busy thinking, he doesn't notice Mona Lisa's affection.
A scarecrow that came to life and became a nuisance to the Bagges in his quest to become tougher.
- Failed Attempt at Scaring: He wants to be scary like the rest of his family, but it just doesn't work for him.
- Nightmare Retardant: In-Universe, he's not scary at all, which bothers him because scaring people is his job.
- No Celebrities Were Harmed: His speech patterns are based on horror film legend Boris Karloff.
- Scary Scarecrow: He is a living scarecrow, but he just can't scare anyone (much to his consternation.)
- Well-Intentioned Extremist: He's very kind, but his efforts to protect Murial went a little overboard. To be fair, after getting a taste of the kinds of horrors the Bagges meet on a regular basis, he isn't completely wrong. However, removing Eustace and Courage from her life and locking her in a saferoom in the basement was definitely an overreaction.
A disfigured intergalactic invader who briefly appears in "Night of the Scarecrow", attempting to stage a conquest or something.
- Aliens Are Bastards: The first thing he does when he arrives to Earth is to antagonize Courage and Muriel with a Ray Gun. Thankfully, Courage's Wild Take scares him away before he can do any actual harm.
- Dirty Coward: Despite his horrifying appearance, he's actually quite the scaredy cat. Courage's screaming (and dislodged heart) terrifies him.
- Early-Bird Cameo: He makes a split-second appearance on the TV in the season 2 openings, a full year before he makes his proper, albeit very brief appearance.
- Eldritch Abomination: He has one of the more terrifying monster designs, even though he ultimately doesn't get a chance to do much of anything.
- Flying Saucer: His sudden arrival comes in the form of a pretty standard UFO.
- Meaningful Name: His name, Feo, is Spanish for "ugly," which perfectly describes his Gonk-ish appearance.
- Ray Gun: He attempts to hold Muriel and Courage hostage with a space-age ray gun.
- Screams Like a Little Girl: Quite literally, actually. Courage screaming his heart out spooks him enough to book it almost immediately after arriving.
- The Stoic: He has a rather serious, mean-looking expression almost always. Ultimately subverted though, as he's a complete chicken.
- Tentacled Terror: He has no arms or legs, merely a swath of tentacles.
Some baby vulture-like birds who required sustenance from Muriel and Courage, courtesy of their mother.
- Accessory-Wearing Cartoon Animal: They all wear bonnets.
- Fish Eyes: Their eyes face different directions.
- Picky Eater: They only eat pre-chewed worms. Probably justified because they're babies and aren't old enough to eat solid food yet.
- Ridiculously Cute Critter: In the show's rather strange style, they are pretty adorable. Muriel in particular is quite taken by them.
- Trademark Favorite Food: Worms. Pre-chewed worms, since their beaks aren't big enough for cutting yet (which, funnily enough, is true of many real life raptorial birds.). Courage, of course, has to do the pre-chewing.
The aforementioned baby birds' mother. She picked up Muriel to act as a babysitter for her while she flies off to find a husband.
- Dark Is Not Evil: For a massive, vulture-like bird monster, she's remarkably polite if not eccentric. It's made clear that she posed no malice against Courage or Muriel, and the only time she threatened either of them was for a perfectly justifiable reason.
- Feathered Fiend: While not really that evil or cruel, she's still very intimidating, and makes it clear that she would not hesitate to eat Muriel if anything bad happens to her kids.
- Giant Flyer: Her wingspan is very large and impressive.
- Kidnapping Bird of Prey: Grabs Muriel for the purpose of being her babysitter.
- Mama Bear: She won't take kindly to anyone who causes harm for her children, as this quote illustrates:Mama Bird: If I come back here and find just one feather out of place on their little heads, I'M GONNA EAT YOU WITH THIS CEREAL SPOON!
- No Celebrities Were Harmed: Her voice and mannerisms bear a strong resemblance to those of Fran Drescher.
- Scavengers Are Scum: Subverted; visually she's modeled after a vulture, but is a legitimately pleasant individual...just don't mess with her kids.
- Toothy Bird: Probably justified though, since she's obviously not supposed to represent any real bird species.
- Villainy-Free Villain: She's technically the antagonist of the episode, but she's also one of the few antagonists in the series who is neither evil nor particularly mean—the only major threat she poses is the threat of Mama Bear-fueled retribution should anything bad happen to her kids, something that any parent would probably see as justified.
A lonely scientist whose sentient house keeps him from having neighbors.
- Cool Shades: He wears a pair of red rockstar shades.
- Einstein Hair: His hair is a cross between mad scientist hair and an 80s-style perm.
- Genius Loci: His house is sentient and happens to be extremely overprotective of Gerhart.
- I Just Want to Have Friends: He desires friendship, but finds himself all alone. Courage and Muriel help him.
- Mad Scientist: He used music to bring his house to life.
- Magic Music: He composes records with magical effects seemingly themed around buildings. He brought his house to life in the past, makes the Bagge household walk over to become his neighbor, and at the end of the episode causes an entire town complete with residents to build up around him.
- Nice Guy: He's not really a bad guy at all. All he wants is company.
- No Celebrities Were Harmed: He's modeled after Roy Orbison
- Noodle People: One of many characters on the show with a torso and limbs that are long and thin.
- The Von Trope Family: His last name starts with "Von".
- Accessory-Wearing Cartoon Animal: He wears glasses.
- BFG: He owns a large laser rifle, the same kind that the deer hunters use. Exactly how he got one is anyone's guess.
- Character Catchphrase: "A deer's gotta do what a deer's gotta do!"
- Genius Bruiser: While he mostly uses a large laser rifle against Eustace, he can beat Eustace just as fine in a game show.
- Green Aesop: His episode has an obvious moral against hunting.
- Hero Antagonist: He doesn't really have anything against outsiders, he's just sick of the hunters, and was more than willing to solve the problems in a game of wits.
- The Hunter Becomes the Hunted: He knows how to play the hunters' own game against them.
- Papa Wolf: He's trying to protect his family.
A man who cuts peoples' portraits in paper, desiring his creations to one day take lives of their own.
- Cool Old Guy: A truly gifted artist, and a nice guy once you get to know him.
- Dark Is Not Evil: He's shady, but he's not a bad guy. He just wants his art to have life.
- Einstein Hair: What's left of his hair is white and wavy.
- Evil Laugh: Subverted. He isn't a villain, but he laughs like one.
- Large Ham: He acts like a very stereotypical Mad Scientist in a lot of ways.
- Paper Master: What with being an artist who sees his work as his children.
A pair of paper cut-outs made by the Silhouette Maker in an attempt to give them life by taking over the original Muriel and Eustace's lives.
- An Arm and a Leg: Paper Muriel ends up tearing off one of her hands, and Paper Eustace gets both of his arms torn off, but they're easily fixed when Courage glues them back on.
- Art Initiates Life: They're silhouette profiles that came to life.
- Become a Real Boy: Played straight at first but then eventually inverted. They try to live a normal life, but being made of paper proves making that very difficult until Courage shows them that they can find different ways to enjoy life being made of paper.
- Body Horror: They fully gain life by robbing it from Muriel and Eustace, leaving both of them dessicated and lifeless husks. Fortunately, they can reverse the process to give back the life they took.
- Made of Plasticine: Being made of paper, the two of them are very fragile. Paper Muriel stabs a sewing needle right through her hand, and then rips that hand off trying to pull the needle out. She then smolders her other hand holding a teapot over an open flame until Courage douses her with water, making her all soggy and wrinkled. Paper Eustace doesn't fare much better, tearing off both of his arms just trying to lift the hood of the truck.
- Major Injury Underreaction: They don't seem to feel pain. Paper Muriel only reacts with annoyance when stabbing her hand with a sewing needle, and is only mildly surprise when she tears the same hand off. Even when her other hand starts catching fire, she seems to be reacting less out of pain and more out of the fear that the rest of her will catch fire as well. Paper Eustace reacts to tearing both of his arms off with a dismayed "Aw, nuts."
- Morally Superior Copy: Paper Eustace, as stated below, is a much nicer person that real Eustace.
- Nice Guy: In stark contrast the real Eustace, Paper Eustace is far nicer, only calling Courage a stupid dog out of habit at first before backpeddaling and calling him a nice dog.
Both
- Ambiguously Gay: There seems to be an implied lesbian undertone to their friendship. They are last seen cuddling, with Bunny holding up Kitty's mouse toy like a mistletoe.
- Broken Bird: Both of them are women trying to cope with the abuse and misfortunes they've suffered in the past. Bunny is a straightforward example, with Kitty being the Defrosting Ice Queen variant.
- A Dog Named "Dog": They are a kitty named "Kitty" and a bunny named "Bunny:"
- Heterosexual Life-Partners: Well, that's assuming that they really are heterosexual. If one thing's for certain, they're completely loyal companions to each other.
- Humanlike Foot Anatomy: They do look like paws, but they work exactly like human appendages.
- Noodle People: Noodle Animals, actually. But they otherwise fit the bill of having long and thin torsos and limbs to a T.
Kitty
- Ambiguously Human: Due to first appearing with a mask and robe, it wasn't clear what she was at first. Courage naturally assumed she was an evil monster out to eat his family, until it turns out she's an anthropomorphic cat (not unlike Katz).
- Ambiguously Related: She's an anthropormorphic cat with red fur... like Katz.
- Berserk Button: Dogs, at least at first, prove to be her main anger trigger.
- Cartoony Tail: Kitty's tail looks like a fox's tail.
- Cat Girl: A tall cat-person, who looks like a female Katz.
- Cats Are Mean: Kitty was mean to Courage in the beginning, because of her passionate hatred towards dogs. However we then find out what happened to her best friend.
- Cool Mask: She wears an eerie white mask that stares straight into your soul. At the end of the episode Eustace keeps it as a face protector.
- Fantastic Racism: Kitty has a violent hatred of dogs. She at first lashes out at Courage, though she later changes her mind and thanks him for rescuing Bunny.
- Freudian Excuse: Her hatred of dogs and abuse towards Courage turns out to be due to her close friend being abused by a cruel gangster dog who also threatened her life if she tried to help her.
- Freudian Excuse Is No Excuse: While they're the result of something genuinely horrible and upsetting, her prejudice towards dogs and mistreatment of Courage are never portrayed as justified, and she admits she was wrong at the end of the episode.
- Kick the Dog: The first thing she does is violently bash in Courage's head with a sink.
- Malevolent Masked Woman: For the first half of the episode she's wearing a creepy white mask and robe, and is introduced by assaulting Courage for no apparent reason.
- Mega Neko: Like Katz, she is a large feline.
- Pass Fail: Kitty's mask and dress are a fairly obvious metaphor for unsuccessfully dressing oneself as another demographic.
- Poor Communication Kills: Almost the case between Courage and Kitty. Courage probably would've been happy to help her if she didn't assume that he was a bad person and attack him unprovoked.
- Stalker without a Crush: An eerie montage shows that Kitty had been watching the Bagges before actually introducing herself to them.
- Super-Strength: Kitty is strong enough to use a washing machine as a weapon, as Courage found out.
- Tragic Bigot: Kitty hates dogs and repeatedly declares that "dogs are evil" because of how Mad Dog treats Bunny like crap. Courage eventually manages to prove her wrong by saving Bunny.
- Tsundere: She is aggressive most of the time, but shows her softer side when Bunny is around.
Bunny
- Accessory-Wearing Cartoon Animal: Wears a pearl necklace and bracelet.
- Ambiguously Bi: Implied to have feelings for Kitty, but once had a crush on Mad Dog... before he started abusing her, of course.
- Amazing Technicolor Wildlife: She is pink.
- Butt-Monkey: To put it simply, the poor girl just happens to be the one thing her boyfriend takes his rage out on, and then his gang buried her in a flowerpot when she tried to escape. For all this, she's likely the only example of one whose suffering is completely Played for Drama on this show.
- Bunnies for Cuteness: She is a bunny and very sweet.
- Damsel in Distress: She does try to escape but she doesn't get far. Thankfully, Courage helps her.
- Domestic Abuse: She's a victim of this, let's just put it at that. The abuse is implied to be physical, but nothing is ever seen aside from Bunny being trapped in a large flowerpot. There’s also the fact that her boyfriend despised her best friend and drove Kitty away to have Bunny all to himself.
- Pink Means Feminine: Her fur is pale pink.
The previous ruler of China who, upon being handed the now-empty silkworm box, helps Courage save Muriel. She reclaims the throne upon finding that Courage has successfully completed the journey she sent him on (and consequently killed the Evil Empress).
- Animorphism: Transforms into a bird and a dragonfly.
- Asian Rudeness: Averted entirely. Unlike her sister and nephew, she is a warm, calm, faithful person who assists Courage and saves both Muriel and her kingdom.
- Beauty Equals Goodness: She is beautiful both on the outside and on the inside.
- Evil Twin: Inverted, as she is the Good Twin of the Evil Empress.
- King Incognito: Disguised as a peasant who runs a restaurant.
- Rightful King Returns: She takes her rightful place as China's ruler after her wicked sister is defeated.
- Telepathy: When Courage falls into her restaurant, she reads a bowl of noodles and instantly understands his situation.
An unnamed water dragon that appears in the episode, "Food of the Dragon." The dragon is William's long lost brother and is the one to inform him that he is none other than a water dragon himself, not a flying dragon.
- Evil Brit: Subverted. He is not a villain and is a nice guy.
- High-Class Glass: He uses one, when he meets his brother again.
- Long-Lost Relative: He is reunited with his lost brother and reveals that he is a sea dragon and when William was just a baby he separated from his family and was raised by flying dragons. It's the reason why it can't fly.
- Nice Guy: He is a good-hearted dragon that would never hurt a fly.
- Our Dragons Are Different: He is a sea dragon, that only eats fish and frozen fish sticks and he is happy not to be a man-eating flying dragon.
- Stock Animal Diet: His favorite food is: fish and fried fish sticks. When the duo (Courage and Muriel) begin to float on the water, he emerges from the lake and stands behind them. They scream in fear until William's brother assures them that he isn't going to hurt them. He then offers them some fries and a fish shoulder and says that it's so good and that he likes being a water dragon and not a flying dragon that eats people.
A female, space-dwelling squid-like creature who was tragically and heartrendingly separated from her husband, who was devoured by a space whale. She ends up crashing onto Earth as the last of her kind... and getting progressively sicker. Unfortunately, the government discovers her and wants possession of her — right when she's pregnant with babies.
- Dark Is Not Evil: She's a dark-colored space monster, but she's just a loving mother and grieving spouse.
- Flying Seafood Special: Giant space squid that can naturally defy gravity and "swim" through air and vacuum alike.
- Giant Squid: The Starmakers are giant space squids that produce stars instead of ink.
- Green Aesop: She's slowly being killed by military research and separated from her eggs. If her eggs can't hatch, there will be no more stars in the sky. It's pretty easy to fill in the blanks as to what environmental moral is being explained here.
- Heroic Sacrifice: Her husband ends up sacrificing himself in an explosion of stars to save his wife and children, taking the giant space whale with him.
- Last of Her Kind: She's part of a critically endangered species, especially after her mate died. But at least her offspring are born not long before her own demise.
- Mood Whiplash: Her episode tends to go back and forth between the last moments of the life of a space squid, and some silly antics with some Ninjas only marked "1", "2", and "3". It's rather jarring.
- Panspermia: Upon death their bodies convert entirely into a garden on a planet's surface. Along with making stars, it's implicit that this is a major driver in supporting life in the universe.
- Space Whale: A nasty enemy of these creatures is a giant space whale that tries to eat them in a manner similar to a black hole.
- Starfish Alien: Well, she's more like a squid alien.
- Transflormation: After the birth of her children, the mother leaves containment to the open ground so her body can convert into a flowering garden upon death.
Two multi-armed aliens who use Eustace and Muriel as lab rats in order to cure a disease affecting their species that causes their extra arms to keep punching themselves.
- Aerith and Bob: Jay and Lazzo.
- Alien Abduction: They use a tractor beam to capture the entire Bagge farmhouse and its inhabitants to experiment on them.
- Buffy Speak: Jay. "THE BIG SLIDEY THING!"
- Character Catchphrase: Jay's "RIIIIIIIIGHT...".
- Commissar Cap: Lazzo wears a cap to show he's a captain.
- Eye-Obscuring Hat: Lazzo's eyes are always hidden by his hat.
- Fat and Skinny: Jay's fat and Captain Lazzo's skinny.
- Lantern Jaw of Justice: Both have big chins, but especially Lazzo, and they're trying to find a cure for the illness wiping out their species.
- Mad Scientist: Jay. He would've preferred to be a telemarketer though.
- Perma-Stubble: Lazzo has five-o-clock shadow.
- Those Two Guys: They share that dynamic, despite being the central characters of their episode.
- Transformation Horror: They turn Muriel and Eustace into half-alien hybrids in hopes of extracting a cure from them, but they end up growing some additional parts too.
- Well-Intentioned Extremist: They abducted and experimented on the Bagges in hopes of finding a cure for a deadly pandemic that was threatening their race.
Courage's mother and father, who ended up shot into space by an evil veterinarian when their son was a puppy, which led to Courage being found and adopted by Muriel. They were never seen reuniting with their son, but they do get a chance to get even with the vet who originally sent them into space after Courage defeated him.
- Accessory-Wearing Cartoon Animal: Courage's mother wears a hat and shoes as her only clothing.
- Good Parents: They loved their son and were horrified when the vet separated them from him.
- Last Episode, New Character: They don't appear until "Remembrance of Courage Past", the first half of the final episode.
- Missing Child: They were separated from their son when he was only a baby and never knew what happened to him.
- Strong Family Resemblance: They both look like Courage, except his dad has bushy eyebrows and a mustache and his mother has eyelashes and lipstick and wears shoes and a hat.
- Tertiary Sexual Characteristics: Courage's mother has eyelashes and wears lipstick to show that she's female.
- Unnamed Parent: Courage's father is at one point addressed as "Henry" by his wife, but the name of Courage's mother and his family's surname remain unknown.
A blue... thing that appears in the first of Courage's nightmares in "Perfect". It appears to be either a warped bugle or possibly a deformed fetus with an equally deformed human face stuck onto it. Like the Violin Girl, practically nothing is known about it, but it's an unforgettable sight for any fan of the series.
- Ambiguously Evil: It never does anything in its brief appearance other than tell a dog he isn't perfect, and even then it may not have been intended as malicious.
- Anthropomorphic Personification: Of Courage's anxieties likely, taking the form of Eustace's bugle.
- Brutal Honesty: "You're not Perfect." Cruel, but Courage did need to accept that he can't achieve true perfection.
- Body Horror: The creature appears to be a nightmarish amalgamation of Eustace's bugle and a human being. Most notably, the bugle's tube is spiraling into the top and protruding from the side of its head.
- Dark Is Not Evil: He may be grotesque looking, but he doesn't do nothing evil during the nightmare and his words ("you're not perfect") are arguably what helps Courage to deal with The "Perfect" Teacher.
- Dream Walker: Assuming it is real, this is how it manifests to Courage.
- The Grotesque: The creature may be freakishly deformed, but its facial expressions seem to imply that of a depressed and lonely individual.
- The Eeyore: It noticeably sinks in emotionless fashion after saying its only line; combined with its color palette, the creature could very well be a personification of Courage's self-esteem at the time.
- Humanoid Abomination: Barely on the line between this and full-on Eldritch Abomination.
- Hypocritical Humor: It whispers that Courage is "not perfect", despite it being imperfect in form itself.
- Jump Scare: The way it comes completely out of nowhere, coupled with the sudden change in animation style and music change, makes it one of the most frightening examples of this.
- Last Episode, New Character: It appears in the second half of the Grand Finale.
- Maybe Magic, Maybe Mundane: The creature is likely just a nightmare conjured by an anxiety-stricken dog, but considering everything else that's real in this universe, it's not off the table to say it's an entity dropping by to give advice.
- Nightmare Dreams: Appears as the first of several perfection-themed nightmares that Courage endures in the episode.
- Our Monsters Are Weird: It's a blue, hazy, floating broken bugle with a face stuck on it, with weird tendrils attached to its head with thorns for ears and a whispery voice, often described as a "fetus." Words cannot describe it.
- The Spook: Part of what makes it so disturbing is that we know absolutely nothing about what the hell this thing is or where it came from.
- Surreal Horror: What makes it so creepy is its impossibly warped anatomy and weirdly human face, like something out of Salvador Dali's nightmares.
- Troperiffic: Considering it appears for all of 9 seconds, the fact that this entry has so much to say is quite impressive.
A bizarre, red-finned, green-eyed deepsea lizardfish that appears in the bathtub to tell Courage that it's alright to be imperfect and accept his flaws as what makes him unique and beautiful.
- The Conscience: It is meant to be the good counterpart of the Perfectionist Teacher, telling him to accept his faults as they are what makes him perfect.
- Creepy Good: He pops out of nowhere and looks like an unsettling deepsea creature, but he's nothing but nice to Courage and is the Good Counterpart to the Perfectionist Teacher.
- Good Counterpart: While the Perfectionist Teacher is the manifestation of Courage's self-esteem, the Fish serves as his moral guidance.
- Last Episode, New Character: He only appears in the second half of the Grand Finale, not having appeared in any other episodes before this one.
- Nice Guy: He kindly helps Courage when the latter is at his lowest point.
- No Good Deed Goes Unpunished: He tells Courage to accept his flaws and that he's already perfect as he is. And his reward? He gets fried and served as dinner though strangely he seems happy in the end.
- Unexplained Accent: He has an Argentinian accent in the Latin American Spanish dub, when no other character has one. He even swears in the name of Diego Maradona that he is imparting a good lesson to Courage.
- You Are Better Than You Think You Are: The lesson he imparts to Courage is that he shouldn't let other people's disparaging remarks get to him and that he's fine the way he is.