Heathcliff started out as a comic strip series before leaping to the TV screen. He is proclaimed the terror of the neighborhood, and no man, child, milkman, or dog (except for sometimes Spike), would dare cross him.
Tropes associated with Heathcliff:
- Big Eater: So much of one that Garfield would hide his head in shame.
- Cassandra Truth: Heathcliff would occasionally be accused of crimes that were done by another cat or dog. Everyone in town believes he's the criminal, so Heathcliff has to clear his name.
- Cats Are Mean: He's the toughest cat in Westfinster and its resident bully to all dogs, rival gangs, and the milkman. Lampshaded by the show's intro and theme song:"Heathcliff, Heathcliff, no one should terrify the neighborhood.""But Heathcliff just won't be outdone, playing pranks on everyone."
- Clingy JealousGuy : Hitting on Sonja in front of Heathcliff is never a good idea, 'cuz the offender usually ends up in a body cast in short order. The more clever ones will play on Sonja's sympathies so she'll protect them from him... but Heathcliff still finds ways to make them regret it.
- The Dreaded: Most of the neighborhood cats and dogs fear Heathcliff. And their fears are pretty much justified considering he could beat up scores of them at once.
- Evil Laugh: Well, more like a weird sort of Evil Chortle. Mel Blanc definitely made it distinct.
- Invincible Hero: Heathcliff pretty much goes undefeated throughout the series. The only loss he suffers is to Tammy and even then that's because he refuses to fight her on account of her being a girl. The only cats who could put up a prolonged fight against Heathcliff were the Siamese Twins and even then it was basically a two-on-one catfight.
- Mel Blanc: Heathcliff was his last new character.
- Pint-Sized Powerhouse: He's able to beat up multiple cats and dogs more than twice his size.
- Real Men Wear Pink: Is often happy to let Marcy dress him as a baby and push him around in her baby carriage.
- Trademark Favorite Food: Loves his fish.
- Wouldn't Hit a Girl: In the episode "Terrible Tammy" Heathcliff can't bring himself to sock out Tammy, a cat who's equally as troublesome as he is. His girlfriend Sonja does it for him.
Tropes associated with Sonja:
- Beauty Mark: Hers in just beneath the corner of her right eye.
- Clingy Jealous Girl: Seen whenever Heathcliff starts taking her for granted and, if she even thinks he's two-timing her, she won't hesitate to show him that two can play that game.
- Dude Magnet: All the cats in the neighborhood know Sonja's a class act and they all want her for themselves, regardless of incurring Heathcliff's wrath.
- Head-Turning Beauty: She's been hit on by neighborhood cats, celebrity feline actors, and even Heathcliff's cousin.
- Proper Lady: In contrast to Riff-Raff's girlfriend, Cleo, Sonja is all about proper etiquette in courtship and expects Heathcliff to act accordingly. She'll quickly point out if he's being improper and explain how a true gentleman treats a lady, which often causes Heathcliff to snarkly remind her that he's no gentleman.
- Uptown Girl: Sonja is repeatedly noted by Hector and her other admirers as a "classy dame" because of her looks and manner of speaking.
- Well, Excuse Me, Princess!: Invoked by Heathcliff whenever Sonja starts getting on his case about his lack of proper etiquette.
A musclebound bulldog owned by the local bully, and Heathcliff's favorite target. Thanks to being beaten up so often, he's actually terrified of Heathcliff, but tries to put up a tough front to support his image.
Tropes associated with Spike:
- Boisterous Weakling: He's a big, hulking bulldog and he talks a good game, but he always loses fights even when Heathcliff isn't involved.
- Bullying a Dragon: Despite his fear, he still frequently attempted to intimidate or attack Heathcliff. Usually, this backfired.
- Dogs Are Dumb: Spike is such a dimwit that Heathcliff often notes that Spike makes things too easy for him at times. In some cases, Heathcliff literally sighs and walks away without bothering to finish whatever prank he was gonna pull.
The Catillac Cats
The leader of the junkyard gang, The Catillac Cats (originally "The Cadillac Cats". The spelling was changed to avoid copyright issues with the Cadillac car company). Although he's short, he's just as tough as any other big cat, much like Heathcliff. He often plans schemes to get his hands on food or money. He is rarely successful however. Most of his schemes are just ways to please his girlfriend Cleo.
Tropes associated with Riff Raff:
- Cats Are Mean: In his worst moments.
- Conservation of Competence: Hector, Wordsworth, and Mungo either don't know, or don't care to admit that they really do need Riff Raff as their leader. He's the only one in the group that does seem to have brains. The plot of "Hector's Takeover" is built around this.
- Cool Loser: Though the leader of his own gang, Riff-Raff is all but outright stated to be second-fiddle to Heathcliff. Likewise, he's smart enough to know how to get things done, but his plans tend to fail half the time. The same can be said of his looks, which Cleo and other females have described as cute for an alley cat, but still scruffy looking.
- Last-Second Word Swap: From the episode "Cleo Moves In": Riff Raff is setting his place up for Cleo and mumbles to himself: "It would be nice having her here. I wouldn't have to go chasing her down for...intelligent conversation".
- Mock Millionaire: He does this to impress his mother in "Riff Raff's Mom".
- The Napoleon: Riff Raff was much shorter than the rest of his gang. Though he took it better than most Napoleons, his gang members often pissed him off.
- Nice Hat: Riff Raff isn't Riff Raff without that big baseball cap.
- Pint-Sized Powerhouse: Riff Raff is acknowledged as being one of the toughest cats in Westfinster, despited being a half-pint. It's the reason that few are willing to pick a fight with him and the few that try it, usually end up wishing they hadn't.
- The Smart Guy: It's repeatedly shown that he's the brains of the Cadillac Cats, as Hector, Wordsworth, and Mongo can barely get anything done without him. Riff-Raff's ability to plan also makes him a stark contrast to Heathcliff, as Riff-Raff prefers to get things done through smooth-talking and scheming, as opposed to Heathcliff's strongarm approach.
- Surrounded by Idiots: Both a blessing and a curse. On one hand, it makes it easy for him to take advantage of their stupidity, but he's often left exasperated when Hector and the others screw up his plans.
- Tiny Guy, Huge Girl: He's pint-sized compared to anyone else, including his girlfriend, Cleo, who's nearly twice his height.
- Ugly Guy, Hot Girlfriend: Riff Raff is by no means unappealing, but you'd wonder why someone like Cleo would ever even notice Riff Raff. In fact, in a flashback episode showing when the two first met, Cleo doesn't seem to give him a second thought until her then-boyfriend starts beating him up for no good reason.
Riff Raff's classy girlfriend, who lives in a music store.
Tropes associated with Cleo:
- Action Girl: She can be one, as in "Who's Got the Chocolate?", where she both masterminds and participates in a plan to rescue Riff Raff after he's kidnapped by canine gangsters. However, this aspect of her is very much Depending on the Writer.
- All Girls Want Bad Boys: Downplayed. While Riff-Raff is the leader of a street gang, she knows he's a decent sort (most of the time).
- Dude Magnet: Several episodes show that even Leeroy can be flustered by her with little more than a wink, and Hector can be caught making eyes at her on occasion. The episode about Riff-Raff's cousin, "Lucky", culminates in Lucky plotting to steal Cleo from Riff-Raff, as have several other would-be suitors. In another episode, "Harem Cat", she was abducted by a feline Sultan who was determined to make her one of his concubines! Suffice to say, she's the cats' meow.
- The '80s: She embodies everything that was considered hot and fashionable from the time period, from her blonde hairdo, to her leg warmers (made popular by the movie Flashdance), and the fact that she lived in a music store.
- Furry Fandom: Yet another 80s gateway into the fandom.
- Getting Crap Past the Radar: She pulled this off a lot.
- Girl Next Door: Cleo fills the role, despite her looks and uptown status, being that she's down-to-earth. At most, she'll demand a bit of excitement now and then. Otherwise, she accepts Riff-Raff for who he is, rather than trying to change him.
- Head-Turning Beauty: Moreso than Heathcliff's girlfriend, Sonia. Multiple guys have tried to woo her away from Riff-Raff while others, such as "Lucky", have plotted to outright steal her from him. Even Leeroy is infatuated with Cleo, despite his disdain for cats.
- Humanoid Female Animal: She's a cat who walks upright, has blonde hair, and an hourglass figure much like a human female's.
- Nothing Exciting Ever Happens Here: She says this in "Cat Balloon".
- She's not afraid to let Riff Raff know whenever she's getting bored with hanging around the city or the junkyard, which easily kicks off several of their misadventures.
- Sexy Cat Person: For a humanoid cat, she has quite the attractive body. Especially the hair, the hourglass figure, and the eyes!
- Uptown Girl: It's never said who Cleo's owner is. All that's known about her is that she lives in a music store in the ritzier part of town.
- Well, Excuse Me, Princess!: She uses this to try and keep Riff Raff's ego in check. Sometimes it actually works... to a point.
- What Does She See in Him?: Hector and others have wondered why a fine feline, like her, would settle for a guy like Riff-Raff when she can easily have someone classier. A fact that she's well aware of and has weaponized whenever she thinks Riff-Raff is taking her for granted.
The defacto leader of the ¡Three Amigos! (at least, in his own mind), Hector thinks he's smarter, stronger and braver than he really is. His particular brand of Zany Schemes usually revolve around his own personal gain — and naturally backfire spectacularly.
Tropes associated with Hector:
- Bullying a Dragon: When in Heathcliff's neighborhood, he likes teasing and goading him despite getting his tail handed back to him several times.
- Can't Get Away with Nuthin'
- Jerk with a Heart of Gold/Jerk with a Heart of Jerk
- The Lancer
- Miles Gloriosus: While Riff Raff could sometimes get away with it, Hector was far more often proven a Dirty Coward.
- Small Name, Big Ego
- The Starscream: Particularly in "Hector's Takeover", where he tries to depose Riff Raff as leader. It doesn't go well. In "Lard Times," he outrights states that it was his goal to take over Heathcliff's territory.
- Tempting Fate: No matter how many times things blow up in his face, he continues to prove himself an unintentional master of this.
The strongest, gentlest and dimmest of the Catillac Cats, Mungo tends to go along with whatever his friends are doing.
Tropes associated with Mungo:
- Beware the Nice Ones: If it sinks in that you're actually threatening him or his friends...
- The Big Guy
- Does Not Know His Own Strength
- Dumb Muscle
- Gentle Giant: A prime example. He holds no ill feelings towards his enemies or his friends when they insult him, and injures caused by him are unintentional.
- Shout-Out: Named for Mungojerrie, either from Cats (which was big at the time) or the T. S. Eliot poem that Cats got it from. Or... Maybe the 70s rock band.
- Simpleton Voice
A laidback inventor and amateur poet who usually tries to speak in rhymes. No matter how forced it gets at times.
Tropes associated with Wordsworth:
A junkyard dog who'd like nothing more than to drive those darn cats away once and for all! However, circumstances sometimes force him to team up with them in order to defend their home.
Tropes associated with Leroy:
- Dogs Are Dumb: Zigzagged. While not as dumb as Spike, Leeroy still gets hoodwinked by Riff-Raff on a somewhat regular basis. It just takes more effort and planning to do it.
- Enemy Mine: During episodes where he and Riff-Raff have to join forces. As soon as the mutual threat is gone, it's back to business as usual.
- Hair-Trigger Temper: Leeroy's a guard dog and the junkyard is supposed to be off-limits to trespassers, especially alley cats. A job which Leeroy takes seriously, which makes the Cadillac Cats a constant source of irritation.
- If It's You, It's Okay: He usually despises cats and wants them out of his junkyard... unless it's Cleo. She's been able to distract him more than once, even causing him to blush.
- Nice Hat: A white commissar's hat, as befitting his position as a guard dog.
- Sitcom Arch-Nemesis: To Riff-Raff and his gang, because they've claimed his junkyard as their home turf and Leeroy ain't having it.
Another pet at the music store where Cleo lives. Wasn't very fond of Riff Raff and the others.
Tropes associated with Bush: