The cast and characters of ''Series/HappyDays.''


!Main Characters
[[folder:Arthur "The Fonz/Fonzie" Fonzarelli]]
--> '''Played by:''' Creator/HenryWinkler

* AccidentalMarriage: With Jenny Piccalo in "Bride and Gloom." Later, it turns out that the marriage was not really valid.
* TheAce: Turns into this around Season 4, with the uncanny ability to come out on top at just about ''anything''. Quite an accomplishment for a high school dropout mechanic.
* BadassAndChildDuo: With Spike and in the finale, his adopted son, Danny.
* BadassBeard: One episode has him growing one, but ultimately deciding to shave it at the end. Potsie collects some of the leftover hair to sell to a waiting crowd of girls outside.
* BadassBoast: '''Fonzie:''' Hey, is not the uniform, its the man ''in'' the uniform and remember, the man in this uniform ''can break your face!''.
* BadassBiker: A family-friendly version; as his role was increased, his badassitude morphed from traditional "tough guy" to near-super-powered nice guy.
* {{Badbutt}}: As stated above, he started out as a tough guy, but became this around Season 4.
* BerserkButton: Fonzie is the epitome of cool but he has his triggers.
** Wanna find out what happens when you mess with his ride, [[TooDumbToLive it's your funeral.]]
** Calling The Fonz "Arthur" has been known to set him off every now and then. [[spoiler:Unless it's Mrs.C of course.]]
* BigBrotherMentor: To Richie, Potsie and Ralph. Later to Chachi, even though they're cousins. The cousins grow especially close in the last seasons, with Fonzie serving as Chachi's best man for his and Joanie's wedding.
* BigDamnHeroes: His specialty. If Richie or Joanie is in trouble, Fonzie will always burst in to save the day. He's done this for Potsie, Ralph, and Chachi on occasion as well.
* TheBigGuy: The strongest member of the cast.
* BornLucky: Downplayed, but he's very lucky.
* BreakoutCharacter: Fonzie's probably the most famous example of this trope, which was even originally ''named'' "The Fonz."
* TheCasanova: The guy can ''snap his fingers'' and women will run up and make out with him!
* CatchPhrase:
** Ayyyyyyyyyy!!!!!
** Sit on it!! [[note]] Also used by Richie, Ralph, Potsie, Marion, Joanie, and sometimes Howard [[/note]]
** Whoa!
** Correctamundo
* CharacterDevelopment: Starting in Season 3.
* TheCharmer: However many women The Fonz has dated, he treats them all with respect.
* ChickMagnet: He can pick up women at the drop of a hat, usually thanks to a high level of confidence. One good example is when he starts to romance an airport ticket agent over the phone:
--> '''Fonzie:''' What makes me think I'm so cool?
--> ''(hangs up the phone, which rings again a few seconds later)''
--> '''Fonzie:''' That's what makes me think I'm so cool.
* CoolBike: According to The Fonz himself, his bike is what made him cool. So he's reasonably pissed when Ralph accidentally wrecks it...
* CoolTeacher: In Season 8, he becomes the new teacher of auto mechanics at Jefferson High School.
* DeadpanSnarker: The show would not be the same without his smug one-liners.
* DisappearedDad: His father ran out on him when he was only four.
* DoubleDate: He and Richie with Series/LaverneAndShirley in "A Date with Fonzie."
* EarlyInstallmentWeirdness: Wore a beige windbreaker instead of his trademark leather jacket for the earlier episodes, because the network was convinced that his leather jacket would make people think he was a hoodlum.
* EmbarrassingFirstName: Arthur. With the exception of Marion, Fonzie doesn't let ''anyone'' call him that.
* EmbarrassingMiddleName: Herbert.
* EstablishingCharacterMoment: While it's the Fonz's second scene in the first episode, he does set an example of just how he is The Ace by unhooking a bra in a single finger snap. Then goes to the mirror to guzzy himself up, only to realize that he's already perfect and then leaves. All while not saying a word.
* EmotionallyTongueTied: When Fonzie tries to admit to Richie that he was wrong, it comes out "I was wr-rró-rró- I was wrrró-rr ... I was not exactly right." He also has difficulty saying he's sorry.
* {{Expy}}: According to Winkler, he based The Fonz off his ''Film/TheLordsOfFlatbush'' co-star Creator/SylvesterStallone.
* FakingTheDead: In "Fonzie's Funeral", after a notorious gangster nearly has him killed in an explosion, he and the Cunninghams devise a scheme to bring the gangster to justice by holding a pretend funeral.
* FingerTwitchingRevival: When he is frozen by Mork, he comes back by first wiggling his thumb.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Choleric.
* {{Flanderization}}: His superhuman power, from Season 5-onwards, as a result of his character evolving into TheAce.
* FourPhilosophyEnsemble: The Realist.
* TheFriendsWhoNeverHang:
--> '''Fonzie:''' Hey, Potsie! How long has it been since we hung out together?
--> '''Potsie:''' Five years.
--> '''Fonzie:''' Let's make a deal that we meet every five years, alright?
* GaggingOnYourWords: He is physically incapable of saying that he's wrong.
* GirlOfTheWeek: He's often seen with a different girl every episode, and it's implied that he typically has more than one date per night.
* GreaseMonkey: Works as a mechanic, and later becomes the auto-shop teacher at Jefferson High School.
* GreaserDelinquents: Arguably the most famous example.
* HeelFaceTurn: Revealed in "Our Gang" via flashback sequences that he used to be part of a gang, before Richie convinced him that he didn't need gangs to show he was cool.
* HellBentForLeather: From Season 2-on, except for a few notable occasions, he is ''never'' seen without his leather jacket.
* TheHerosBirthday: "The Second Anniversary Show", "The Sixth Sense", "Hi-Yo Fonzie, Away!"
* HeterosexualLifePartners: With Richie.
* HiddenHeartOfGold: Though very protective of it in earlier seasons, he slowly opens up to most of his friends.
* HonorBeforeReason: "The Fonzarelli Code."
* IconicItem: His leather jacket.
* IOweYouMyLife: Potsie saves his life in one episode. All he wants in return is to 'pal around' with the Fonz ... all the time.
* JackOfAllTrades: Subverted, The Fonz is a ''master of all.''
* LadykillerInLove: First with Pinky Tuscadero in Season 4. In season 10, with Ashley Pfister.
* TheLancer: You could not find a better example. He's the exact opposite of the clean-cut, all-American Richie Cunningham. But after Richie left, he became TheHero.
* LargeHam: After Season 2.
* LastNameBasis: Refers to most of his friends this way.
* LikesOlderWomen: On occasion.
* LockedInARoom: With Richie, Ralph, and Potsie in "Time Capsule."
* LongRunnerCastTurnover: One of only four characters to remain on the show for its entire run. And, along with Howard, the only other character to appear in every episode.
* MadeOfIron: He can punch through doors, ram his head into a concrete wall unscathed, and ''bend iron''.
* MasterOfDisguise: Goes undercover in a few episodes, such as "Fonzie's Funeral", where he has to pretend to be his ''mother'' to trick The Candyman.
* MissingMom: His mom seems to be this, though the circumstances aren't quite clear. One episode is centered around him encountering a woman he believes is his mother. The woman manages to convince him that she's not, but after he leaves, the audience sees her look at a picture of Fonzie as a baby and sigh.
* MrFixit: Let it be known that he's the best at fixing cars (if not, [[BadassBoast he'll tell you]]).
* MusclesAreMeaningless: Can take on goons who are a foot taller or even twice as muscular.
* NewPowersAsThePlotDemands: Over time, he started to gain superhuman abilities, such as a definitive knowledge of martial arts, fencing, and even shark-jumping!
* TheNicknamer: Refers to Richie as "Red", Joanie as "Shortcake", and Marion and Howard as "Mr. and Mrs. C".
* NobodyTouchesTheHair: He ''never'' lets anyone mess with his hair.
* NoIndoorVoice: From Season 2 on, see LargeHam.
* NoPartyGiven: Averted in "The Not Making of the President" where he supports Republican candidate, Dwight D. Eisenhower ("I like Ike! My bike likes Ike!"). Played straighter earlier in the same episode though, where he's seen to carry both Eisenhower and Stevenson buttons in order to romance the girls from both parties, switching them out as needed.
* NotEvenBotheringWithTheAccent
* OneManArmy: The Fonz is a one man demolition squad that requires no backup in a fight. He's taken out thugs and gangsters single-handedly.
* OnlyKnownByTheirNickname: ''No one'' calls Fonzie "Arthur" except Marion. ''No one.''
* ParentalAbandonment: Both his parents ran out on him, forcing Fonzie to leave with his grandmother until moving in to the spare room above the Cunninghams'.
* ParentalSubstitute: For Chachi.
* PercussiveMaintenance: The [[Administrivia/NamingATrope Former]] [[TropeNamers Trope Namer]] for this ability.
* PottyEmergency: Implied at the end of The Motorcycle.
* ThePornomancer: The TV UrExample.
* PromotionToOpeningTitles: In Season 2, to reflect on his growing popularity with audiences.
* TheQuietOne: In the first two seasons (mainly the first), with an all-time low of six lines in the pilot. By Season 3, this trope no longer applies to him.
* ReallyGetsAround: He's known to have at least two dates every night (and that's on a slow day). From the sheer number of times Richie has come upstairs to find The Fonz with a girl, it's likely he takes a good number of them home afterwards.
* TheReliableOne: The entire Cunningham family gradually grows to trust him. This includes dispensing advice, keeping secrets, and generally treating him like a member of the family.
* RenaissanceMan: Knowledgeable on a wide variety of mechanical, social, and athletic abilities.
* RuleOfCool: The Fonz abides by this law.
* SensitiveGuyAndManlyMan: Manly Man to Richie's Sensitive Guy.
* SexyManInstantHarem: He can get a whole herd of woman to flock to his side by simply snapping his fingers. An Outtake showed the guys of the show mocking this characteristic by going in place of the girls after the finger snap. Well, we are talking about the Flanderized Fonzie; before this, he was just a mechanic who scored the lowest female trash in Milwaukee.
* ShowStopper: Starting Season 3, whenever he first appeared in an episode, the audience would break out into applause.
* SmugSuper: Dishes out a BadassBoast every now and then.
* SpotlightStealingSquad: And it bugged the hell out of Henry Winkler, who hated how a show based around the Cunningham family had morphed into all-Fonz, all the time.
* StreetSmart: More so than Richie, Potsie, and Ralph, which is why he is often there to give them advice.
* TemporaryBlindness: He is victim to this, in tremendously ham-fisted fashion, especially when Richie dismantles his motorcycle to force him to rebuild it while blind.
* ThirdPersonPerson: "The Fonz" sometomies resorts to this.
* TookALevelInKindness: Starts opening up more to those around him, and by the series finale, has progressed from high school dropout to family man.
* TroubledButCute: Token bad boy of the show and ChickMagnet. Of course, he becomes less and less "bad" and troubled as time went on, due to the writers twigging to the fact that he was becoming a role model.
* TrueCompanions: With Richie, Ralph, and Potsie.
* TwoTimerDate: He and Roger (unknowingly) with the same girl in "The Other Guy."
* UnderNewManagement: He and Al become co-owners of "The New Arnold's" in Season 7.
* UseYourHead: "Hot Stuff", the episode where Arnold's catches fire has Fonzie trying to break out of the men's room (where he, Potsie, and Ralph are trapped) via this method. It doesn't work.
--> Potsie: Hey, look, there's an outside wall! I wonder what it's made of?
--> Fonzie: Concrete. (passes out)
* VitriolicBestBuds: With Ralph and Potsie.
* WeaksauceWeakness: Cannot stand liver, won't eat it, won't let anyone put it on his plate, cannot look at it, and will leave the room to get away from it.
* WiseBeyondTheirYears: "I'm ahead of my time, Cunningham."

[[folder:Richard "Richie" Cunningham]]
--> '''Played By:''' Creator/RonHoward

* {{Adorkable}}: Red hair, freckles, somewhat awkward, nice to everyone, and liked by everyone.
* TheAllAmericanBoy: The ideal '50s teenager.
* AloofOlderBrother: To Joanie. At his best he can be a CoolBigBro.
* BackForTheFinale: Reappeared at the very end of the final episode (along with Lori Beth) to attend Joanie and Chachi's wedding.
* BewareTheNiceOnes: If provoked, he would become angry or annoyed.
* BigBrotherInstinct: Towards Joanie.
* TheBusCameBack: In a couple of episodes of the last season.
* CantGetAwayWithNuthin: If he tries to keep ANYTHING at all from his parents, count on Joanie to blurt out what he's up to and say that she conveniently "heard it from a friend."
* CatchPhrase: "BUCKO!"
* CharacterSignatureSong: "Blueberry Hill."
* ChildhoodFriends: With Potsie, as evidenced by their close friendship in early episodes. Lampshaded a couple of times in later seasons.
* DoubleDate: He and Fonzie with Series/LaverneAndShirley in "A Date With Fonzie."
* DrowningMySorrows: In "Welcome Home, Part 2", when he was locked in a moral debate about whether or not to stay in Milwaukee and please his family, or head to California and become a screenwriter.
* TheDutifulSon: Often forced (whether he wants to or not) into doing work for others.
* TheEveryman: The quintessential relatable average guy.
* {{Expy}}: Many fans insist that Richie is the teenager [[Series/TheAndyGriffithShow Opie]] would become. [[JustifiedTrope Justified]] since they are both played by Ron Howard.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Melancholic. Textbook definition!
* FourPhilosophyEnsemble: The Cynic.
* GentlemanAndAScholar: A kind young adult who has dreams of going to college and becoming a writer.
* HappilyMarried: To Lori Beth, as of Season 8.
* TheHeart: He's the one who keeps his friends together, and the most morally correct.
* TheHero: The main character for the first seven years, until he's PutOnABus.
* HeterosexualLifePartners: Becomes this to Fonzie. You can tell how much Fonzie value their friendship.
* HollywoodDateless: Despite his occasional self-proclaimed "dry spells" with women, he is often shown to be successful for the most part in the dating game.
* AHouseDivided: With Ralph and Potsie in "The Apartment", when he finds their increasingly outrageous antics difficult to live with.
* LikesOlderWomen: In a couple of episodes, when he felt that he needed to "mature", although none of the relationships were anything serious.
* LockedInARoom: With Fonzie, Ralph, and Potsie in "Time Capsule."
* MiddleChildSyndrome: Averted during the brief period before Chuck faded away; Richie seemed to have the closest relationship with his parents.
* MoralityPet To Fonzie who respects Richie more than everyone else (except [[SmugSuper himself]]).
* NiceGuy: A very decent guy.
* NoPartyGiven: Averted in "The Not Making of the President", where he supports Democratic candidate, Aldai Stevenson.
* OfficialCouple: With Lori Beth in later seasons.
* OnlySaneMan: Sometimes. He's the most levelheaded in his trio with Ralph and Potsie. He complains about this when living with them for a while.
* PassingTheTorch: When Richie left, Fonzie became the shows main character.
* PutOnABus: During Seasons 8-10.
* RelationshipReboot: He and Lori Beth do this, complete with a reenactment of their original MeetCute dialogue.
* SchoolNewspaperNewshound: In "The Muckrackers."
* SensitiveGuyAndManlyMan: Sensitive Guy to Fonzie's Manly Man.
* StraightMan: During Fonzie's more ham-fisted episodes.
* TheTalk: Mentions on multiple occasions that he and Howard have had a complicated discussion on the topic.
* TrueCompanions: With Fonzie, Ralph, and Potsie.
* WeddingDay: With Lori Beth (over the telephone) in "R.C. and L.B. Forever."
* WhatDidIDoLastNight: In "King Richard's Big Night."
* YouthfulFreckles: Lampshaded.

[[folder: Howard Cunningham]]
--> '''Played by:''' Tom Bosley

* AndStarring: "...Tom Bosley as Howard Cunningham."
* BirthdayEpisode: Howard's 45th Fiasco.
* BumblingDad: At times, although he's smarter than most examples, he has his irrational moments.
* TheComicallySerious: Just because he's serious and stern, it doesn't mean he can't be funny in his own way.
* CoolOldGuy: Not so old, but still a cool father.
* DadTheVeteran: He was a chef during World War II.
* DeadpanSnarker: He's probably the snarkiest characters, along with his daughter Joanie.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Choleric mostly with some Melancholic traits too.
* GoodParents: Along with Marion.
* HappilyMarried: To Marion.
* LongRunnerCastTurnover: One of only four characters to remain on the show for its entire run. Along with Fonzie, he is the only other character to appear in every episode.
* NiceHat: His Grand Poobah hat from the Leopard Lodge.
* NoPartyGiven: Averted in "The Not Making of the President", where he makes it pretty clear that he is a Republican.
* OnlySaneMan: He sees himself as this.
* OverprotectiveDad: Towards Joanie.
* PapaWolf: Don't you ''dare'' mess with his family. And yes, that does extend to Fonzie.
* ParentExMachina: Even more often than Marion.
* ThePatriarch: Of the Cunningham family.
* ReasonableAuthorityFigure: One of the most iconic father figures. Grumpy but practical and ultimately understanding.
* StandardFiftiesFather: Without a doubt, one of the greatest TV dads in history.
* SurroundedByIdiots: Everyone who's not family.
* TeamDad: He ends up being a father figure even to Fonzie, not just his children.

[[folder:Marion Cunningham]]
--> '''Played by:''' Marion Ross

* AllLovingHero: Probably the nicest character on the show.
* BerserkButton: She has also been the only character ever to tell Fonzie to "sit on it."
* BewareTheNiceOnes: sometimes, though not very often.
* FirstNameBasis: The only one who calls Fonzie by his first name.
* FieryRedhead: When she wants to be.
* {{Flanderization}}: Her "motherliness", to the point where she even shows concern for people who don't deserve it.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Sanguine/Phlegmatic personality blend
* GoodParents: Along with Howard, she's always a good and caring mother.
* HappilyMarried: To Howard.
* {{Housewife}}: One of the greatest television examples out there.
* LongRunnerCastTurnover: One of only four characters to remain on the show for its entire run.
* MamaBear: Sometimes.
* MoralityPet: For Fonzie, so much that she is the only one who is allowed to call Fonzie by his real first name.
* NiceGirl: More affable and friendly than her husband.
* ParentalSubstitute: For Fonzie. She's also the ''only'' person he allows to call him "Arthur" as a result.
* ParentExMachina: Howard was the best at this but Marion was no slouch either.
* TeamMom: She's motherly not just towards her children, but even their friends.
* WomenAreWiser: At least she's less judgmental than Howard and usually more reasonable.

[[folder: Joanie Louise Cunningham-Arcola]]
--> '''Played by:''' Erin Moran

* AnnoyingYoungerSibling: In the early seasons.
* AscendedExtra: She became a main character (along with Chachi) after Richie left.
* BrattyTeenageDaughter: She has her moments, but she became more mature later on.
* TheBusCameBack: In season 11, after being PutOnABus for her spinoff in season 10.
* CuteBruiser: She is willing to talk tough or defend herself against any guy that tries to make a false move, and is shown to be a fast learner at jujitsu.
* DangerousSixteenthBirthday: Joanie's original date cheated on her with another girl.
* DaddysGirl: Sometimes her father is protective of her.
* DeadpanSnarker: Of the LittleMissSnarker variety especially in early seasons
* DiagonalBilling: With Scott Baio for their Season 10 guest appearances.
* FinalSeasonCasting: [[InvertedTrope Inverted]] because Moran ''returned'' to ''Happy Days'' for its final season.
* FirstKiss: A whole episode centers around this special moment. Another one happened with Chachi so that the pair could become an OfficialCouple.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Choleric.
* TheHeart: In later seasons, after her brother left, she takes this role.
* HormoneAddledTeenager: In the mid-seasons, no doubt as a result of Jenny's influence. Dropped when she began dating Chachi.
* InSeriesNickname: "Shortcake" by Fonzie.
* LightFeminineAndDarkFeminine: The Light to Jenny's Dark.
%%* NaiveEverygirl
* OfficialCouple: With Chachi.
* PantyShot: A couple in her cheerleader outfit.
* PrecociousCrush: On Potsie, in the episode "They Call it Potsie Love." She grew out of it.
* PromotionToOpeningTitles: In season 3.
* PutOnABus: For the spinoff show, ''Joanie Loves Chachi.''
* RelationshipUpgrade: She and Chachi go out on their first date near the end of Season 7.
* ShesAllGrownUp: Even lampshaded in the opening sequence of the final season.
%%* ShesGotLegs
* TheTalk: She sort-of has one in "Not With My Sister You Don't" when Marion tries to explain to her how to fend off any unwanted advances from her date.
* WeddingDay: With Chachi in the finale.

[[folder:Warren "Potsie" Weber]]
--> '''Played by:''' Anson Williams

* {{Adorkable}}: Often scorned by his peers for being a "nerd". Lampshaded in one episode when Joanie starts being attracted to him, ignoring the other people who think he's a "nerd".
* AdvertisedExtra: After Richie and Ralph left, Potsie remains on the show but his screen time is greatly reduced because the writers struggled to find things for him to do. He rarely does anything relevant in an episode (he often appears in just one scene) and is entirely absent from several. Despite this, he's still in the opening credits, even in the last season where he only appears in 6 out of 22 episodes, not including the finale.
* AlliterativeName: '''W'''arren '''W'''eber.
* TheArtifact: After Richie and Ralph left the show. Lampshaded in the episode where Arnold returns to the show.
--> '''Potsie:''' I'm still here!
* BoundAndGagged: In "Fonzie's Funeral Part 2", along with Ralph.
* ButtMonkey: Often on the receiving end of sarcastic wisecracks.
* CallingTheOldManOut: We never actually see Potsie do this on the show, but Potsie mentions at the end of "White Christmas" that he is going to finally have a decent talk with his father.
* CatchPhrase: Potsie used to say "man oh man, you got it made in the shade" to Richie in the first two seasons. Lampshaded during a flashback episode to their sophomore year.
* ChildhoodFriends: With Richie, as evidenced by their close friendship in early episodes. Lampshaded a couple of times in later seasons.
* ComicallyMissingThePoint: Very often.
* CommutingOnABus: Look for Potsie throughout Season 8 episodes in a stream of completely random jobs, including: the announcer at a basketball game, the MC of an awards ceremony, singing at a beauty pageant, etc. before Howard hired him as assistant manager of the hardware store and pledge for the Leopard Lodge. In fact, anytime he appeared after that, it was always with Howard (much to the latter's frustration).
* DemotedToExtra: Starting Season 8, his appearances became much less frequent. There are episodes where he doesn't even have ''lines'' and only appears in crowd scenes or special occasions. His frequent absences in Seasons 9-11 can be chalked up to him attending college or watching over Mr. C's hardware store.
* TheDitz: More so as the seasons went on.
* EternallyPearlyWhiteTeeth: Shown in some of the episodes about he and Ralph living in their apartment that he is obsessed with keeping his teeth clean.
* FearlessFool: He claims to fear nothing on Richie's list of phobias in "Fearless Malph", as opposed to Ralph, who is terrified of every single item on the list.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Phlegmatic
* {{Flanderization}}: His stupidity.
* FourthDateMarriage: Averted in "Potsie Gets Pinned" when he declares that he wants to marry Jennifer Jerome after just one date.
* TheFriendNobodyLikes: In the later seasons, no one (especially Howard) ever seems to enjoy his company.
* GeniusDitz: Potsie's an excellent singer and was smart enough to study psychology in college, but thinks that a pair of scissors is ''two.''
* HeterosexualLifePartners: With Ralph. Originally with Richie, but as Fonzie became TheLancer, Richie and Potsie rarely ever had a one-on-one conversation again. In fact, the last thing Potsie ever says to Richie on the show is a complaint about how Richie's return from the Army is derailing his place on the gang's softball team.
* HilariouslyAbusiveChildhood: If Potsie's very bad relationship with his father wasn't played for laughs, you would think he was the victim of some severe emotional abuse.
* AHouseDivided: He and Ralph are oblivious to the fact that Richie is disturbed by their peculiar living conditions in "The Apartment", while he and Ralph argue over some of Richie's bad advice in "Ralph vs. Potsie."
* IHaveNoSon: He mentions in several episodes that his father doesn't like to tell people that his son even EXISTS.
* IOweYouMyLife: Potsie saves Fonzie's life in one episode. All he wants in return is to 'pal around' with the Fonz ... all the time.
* TheLancer: Was originally supposed to be this to Richie, before Fonzie became the show's BreakoutCharacter.
* LockedInARoom: With Richie, Fonzie, and Ralph in "Time Capsule."
* LongRunnerCastTurnover: One of only four characters to appear in every season of the show. His appearances in the last two seasons really amount to nothing more than cameos and/or guest appearances.
* MyFriendsAndZoidberg: In one of the later episodes, Fonzie says almost this exact quote about him.
* NotImportantToThisEpisodeCamp: Countless times in the last two seasons.
* OddCouple: The Felix to Ralph's Oscar as roommates in their apartment.
* OnlyKnownByTheirNickname: The only one who ever refers to him as "Warren" is Marion (and, on occasion, Fonzie).
* TheThingThatWouldNotLeave: After Howard hires him to work at Cunningham Hardware. Potsie continues to follow him home even after Mr. C's constant reminders that their time spent together was over when the work day ended. Not that Potsie ever picks up on this.
* ThisIsMySide: He and Ralph play this straight in their apartment when bad advice from Richie goes too far.
* ThoseTwoGuys: With Ralph.
* TookALevelInDumbass: From Richie's worldly confidant to Ralph's dim-witted sidekick.
* TragicDropout: He drops out of college in "Potsie Quits School" when he cannot tolerate any more pressure from an abusive teacher. With the help of Fonzie, Potsie manages to convince his teacher (through song) that he can pass his biology test, and reenrolls back into the college.
* TrueCompanions: With Richie, Ralph, and Fonzie.
* TheUnfavorite: To his father, despite being an only child.
* WellDoneSonGuy: Subverted. Most of the time he doesn't even seem to care whether his father notices him or not.
* WhatHappenedToTheMouse: For the finale, at least. No explanation is given as to why one of the show's original main characters failed to make, at the very least, a guest appearance (Ralph didn't appear, either, but he was written off as having gone to optometry school). Anson Williams quit following the 1982-1983 season. He agreed to return for the "Welcome Home Richie" episodes, and completed a handful of others before his departure. For some reason, neither he nor Don Most was asked to return for the series finale.

[[folder:Ralph Malph]]
--> '''Played by:''' Donny Most

* AmbiguouslyJewish: [[JustifiedTrope Justified]] since Most is Jewish in real life.
* BoundAndGagged: In "Fonzie's Funeral Part 2".
* TheBusCameBack: In one episode of the last season.
* ButtMonkey: Not as much as Potsie but he can sometimes be the butt of the jokes.
* CasanovaWannabe: In earlier seasons, his girl-chasing was the primary focus of his character. He would occasionally get dates but generally he was not very successful at it.
* CatchPhrase: "I still got it!"
* ClassClown: The pratical joker of the group.
* {{Cloudcuckoolander}}: He's quite goofy and eccentric, although less of a ditz than Potsie.
* ComicallyMissingThePoint: Sometimes.
* FieryRedhead: Not angry (usually), but very energetic.
* {{Flanderization}}: His cowardice and fondness for telling jokes.
* FourTemperamentEnsemble: Sanguine.
* FunPersonified: He usually has two things on his mind: girls and jokes, though not always in that order.
* HeCleansUpNicely: In "Marion: Fairy Godmother" for his date with Leather Tuscadero.
* HeterosexualLifePartners: With Potsie.
* AHouseDivided: He and Potsie are oblivious to the fact that Richie is disturbed by their peculiar living conditions in "The Apartment", while he and Potsie argue over some of Richie's bad advice in "Ralph vs. Potsie."
* LargeHam: Becomes this around Season 4 as a result of his {{flanderization}}.
* LethalChef: When Richie, Potsie and Ralph move out of home to share an apartment, we learn Ralph uses lighter fluid to ignite his cherries jubilee.
* LockedInARoom: With Richie, Fonzie, and Potsie in "Time Capsule."
* LovableCoward: Starts to become this in Season 3, taken to extremes in later episodes.
* NiceHat: In earlier seasons.
* OddCouple: The Oscar to Potsie's Felix as roommates in their apartment.
* PluckyComicRelief: He clearly wants to be this, since he fancies himself a great comedian and is known for his jokes.
* PungeonMaster: Often saying "I still got it!" after he makes a pun.
* PromotionToOpeningTitles: In Season 2.
* PutOnABus: Along with Richie during Season 8.
* RepetitiveName: R'''alph''' M'''alph'''.
* ThisIsMySide: He and Potsie play this straight in their apartment when bad advice from Richie goes too far.
* ThoseTwoGuys: With Potsie, they are Richie's hangers-on.
* TrueCompanions: With Richie, Potsie, and Fonzie.
* WackyGuy: The resident ClassClown.
* WrittenInAbsence: Ralph's absence from the finale was explained earlier in the same season that he had left to attend optometry school.

[[folder:Alfred "Al" Delvecchio]]
--> '''Played by:''' Al Molinaro

* BackForTheFinale: He comes back in three episodes of the last season, including the finale.
%%* BadLiar
* CatchPhrase: "Yeeppp, yep, yep, yep, yep, yep..." whenever he was disappointed or things did not go his way.
* DumbMuscle: For Fonzie's gangster character in "The Roaring Twenties."
* ExtremeDoormat: He can rarely ever say "no" to anything.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Melancholic
* FourthDateMarriage: With Chachi's mother in "Love and Marriage."
* TheIgor: As part of Fonzie's dream in "Welcome to My Nightmare."
%%* NiceGuy
* NiceHat: Al also sports a spotted hat as a token of his membership in the Leopard Lodge.
* PromotionToOpeningTitles: In Season 6.
* PutOnABus: For the spinoff show, ''Joanie Loves Chachi.''
* SuspiciouslySimilarSubstitute: To Arnold, former owner of the drive-in.
%%* TeamDad
* UnderNewManagement: He and Fonzie become co-owners of "The New Arnold's" in Season 7.

[[folder:Charles "Chachi" Arcola]]
--> '''Played by:''' Scott Baio

* AscendedExtra: Starts out as a recurring character in season 5, becomes a regular in season 6, and by the time Richie is PutOnABus (season 8), he's pretty much the {{Deuteragonist}}.
%%* BadLiar
* TheBusCameBack: In the last season.
* TheCasanova: According to Fonzie, it runs in the family.
* CatchPhrase: "Wa, wa, wa." Dropped as he grew up.
* ChickMagnet: Even Joanie knows that many girls find him attractive.
* CousinOliver: When he's introduced in season 5, he was pretty much a kid compared to the rest of the cast.
* DeadpanSnarker: On occasion, usually when he is irritated with someone/something.
* DiagonalBilling: With Erin Moran for their Season 10 guest appearances.
* DoggedNiceGuy: Towards Joanie in the beginning.
* DropInCharacter: Before he and Joanie started dating, and was more welcome when they were a couple.
* FirstKiss: Shares one with Joanie so that the pair could become an OfficialCouple.
* FinalSeasonCasting: [[InvertedTrope Inverted]] because Baio ''returned'' to ''Happy Days'' for its final season.
* FourPhilosophyEnsemble: The Optimist.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Phlegmatic mostly but he has some Sanguine traits too.
* HeIsAllGrownUp: Goes from a kid who is seen by Joanie as an AbhorrentAdmirer to Joanie's TallDarkAndHandsome love interest.
%%* KidAnova
* TheLancer: To Fonzie in Seasons 8-9 and 11.
* LoveInterest: In later seasons his relationship with Joanie is one of the focal points of the show.
* MrFanservice: The character was very popular with teenage girls.
* NiceGuy: He's got his flaws, but he's such a sweetheart. When something bad happens, it really hurts him, which shows how much he cares for others.
* OfficialCouple: With Joanie, starting in season 8. They even get their own spinoff as a couple.
* OnlyKnownByTheirNickname: No one calls him Charles.
* PromotionToOpeningTitles: In Season 6.
* PutOnABus: For the spinoff show, ''Joanie Loves Chachi.''
* RecurringExtra: In Season 5 and (for the most part) in Season 6, where he was absent for more than half of the episodes.
* RelationshipUpgrade: He and Joanie go out on their first date near the end of Season 7.
* StalkerWithACrush: Displayed some shades of this towards Joanie pre-Season 8.
* TagalongKid: Initially, at least.
* TallDarkAndHandsome: When he grew up. Initially he was shorter than Joanie.
* WeddingDay: With Joanie in the finale.
* YoungEntrepreneur: Chachi seemed to be one of these when he was introduced, although this character trait was dumped in favor of his MrFanservice persona.
* YourCheatingHeart: He cheats on Joanie in one of the opening episodes of Season 9, although they get back together later on in the episode.

!Other Characters
[[folder:Chuck Cunningham]]
--> '''Played by:''' Gavan O'Herlihy, Randolph Roberts

* AlliterativeName: '''C'''huck '''C'''unningham
* AloofOlderBrother: Due to being rarely seen, he and Richie are not particularly close.
* ChuckCunninghamSyndrome: The TropeNamer, unfortunately.
* DumbJock: What little screentime he gets before he becomes a trope, they seem to paint him as TheDitz: for instance, he couldn't figure out that the Christmas lights weren't working because they weren't plugged in. He's also a basketball player.

[[folder:Matsumo "Arnold" Takahashi]]
--> '''Played by:''' Pat Morita

* AsianStoreOwner: A notably early television example.
* TheBusCameBack: Made sporadic guest appearances in 1977 and 1979 before returning full-time in 1982.
* ButNotTooForeign: He has adapted to many of America's cultural attributes, but still embraces his native Japan.
* CatchPhrase: Not really a catch ''phrase'', per se, but he did have a habit of making a "''frrmp''" sound when exasperated.
* ChuckCunninghamSyndrome: Then, he vanished just as suddenly after the first episode of Season 11.
* {{Cloudcuckoolander}}: An eccentric FunnyForeigner.
* OnlyKnownByTheirNickname: Only known as Arnold, and not by his Japanese name.
* PutOnABus: Left his post at Arnold's after his wedding (see below), leading to Al Delvecchio taking his place.
* SignatureLaugh: "BAAHAHAHAHAHAHAHAHAH!" Lampshaded in his 1982 return appearance.
* WeddingDay: A traditional Oriental ceremony to "Momo" Takahashi in the season three finale.
* YouNoTakeCandle: Sometimes.

[[folder:Lori Beth Allen-Cunningham]]
--> '''Played by:''' Lynda Goodfriend

* BabiesMakeEverythingBetter: She gives birth to Richie Jr. in "Little Baby Cunningham", although the baby isn't given much of an emphasis on episodes, disappearing after Lynda Goodfriend left the cast in Season 10, and returning as a fully-grown toddler named Richie, Jr.
* BackForTheFinale: Lori Beth & Richie returned in the series finale Passages Part 2, where they attended Joanie and Chachi's wedding.
* TheBusCameBack: In a couple of episodes of the last season.
* DemotedToExtra: When Richie left to join the Army in Greenland, she stuck around, getting married to him over the phone, and giving birth to Richie's son when he was away. Eventually, she pretty much just stopped appearing entirely unless it was a special occasion, having little way to play off the others.
* HappilyMarried: To Richie, as of Season 8.
* LoveInterest: To Richie.
%%* NiceGirl
%%* OnlySaneWoman
* PromotionToOpeningTitles: In Season 8. Ironically this was the same season her boyfriend Richie was PutOnABus.
* PutOnABus: After Season 9.
* RecurringExtra: In Seasons 5-7.
* WeddingDay: With Richie (over the telephone) in "R.C. and L.B. Forever."

[[folder:Jenny Piccalo]]
--> '''Played by:''' Cathy Silvers

* AccidentalMarriage: With Fonzie in "Bride and Gloom." Later, it turns out that the marriage was not really valid.
* AllWomenAreLustful: ''No kidding.''
* AttentionWhore: Seen in many episodes, like when she desperately tries to impress a group of {{Alpha Bitch}}es.
* BackForTheFinale: Returns as a guest star in the series finale.
%%* BookDumb
* CharacterizationMarchesOn: When she was just TheGhost, Jenny was painted as Joanie's cool and "experienced" friend. However, after she actually appears on the show and emerges as a major character, they made her a delusional and ditzy SmallNameBigEgo who makes Joanie look better.
* {{Cloudcuckoolander}}: She's oblivious to nearly everything around her that doesn't involve boys.
* DropInCharacter: Howard and Marion are often hesitant about having her around Joanie or K.C. because she is "boy crazy."
* GenkiGirl: More perky than the levelheaded Joanie.
* TheGhost: Before season 8, she is frequently mentioned by Joanie but never appears for many seasons.
* GoodBadGirl: Despite being very boy-crazy, she is not a bad person.
* HeWhoMustNotBeSeen: She was an offscreen "bad girl" friend of Joanie until season 8. Once brought onscreen, her character becomes much LighterAndSofter and she's revealed to be just a boy-crazy GenkiGirl.
* HormoneAddledTeenager: Very, ''very'' much so.
%%* JerkWithAHeartOfGold
* LightFeminineAndDarkFeminine: The Dark to Joanie's Light.
%%* LovableSexManiac
* OddFriendship: With K.C. Cunningham in season 10.
* PromotionToOpeningTitles: She's a recurring character in season 8 and 9, and added to the opening in Season 10.
%%* ReallyGetsAround
* SmallNameBigEgo: When she becomes an actual character, it's revealed that the man-hungry girl is more talk than action.
* TomboyAndGirlyGirl: The Girly Girl to K.C.'s Tomboy.
* ToxicFriendInfluence: For Joanie.

[[folder:Roger Phillips]]
--> '''Played by:''' Ted [=McGinley=]

%%* AloofOlderBrother
* CoolTeacher: The coach of Jefferson High and later, the principal of Patton.
* FoolishSiblingResponsibleSibling: The Responsible to Flip's Foolish.
%%* NiceGuy
* PromotionToOpeningTitles: In Season 10.
* RecurringExtra: In Seasons 8 and 9.
%%* SophisticatedAsHell
* SuspiciouslySimilarSubstitute: For Richie.
* TwoTimerDate: He and Fonzie (unknowingly) with the same girl in "The Other Guy."

[[folder:Leopold "Flip" Phillips]]
--> '''Played by:''' Billy Warlock

* AnnoyingYoungerSibling: To Roger.
* ArsonMurderAndJaywalking: In "I Drink, Therefore I Am" when he accidentally injures Heather while driving intoxicated.
%%* BareYourMidriff
%%* BlackSheep
%%* BookDumb
%%* CousinOliver
%%* {{Delinquent}}
%%* EmbarrassingFirstName
* FoolishSiblingResponsibleSibling: The Foolish to Roger's Responsible.
%%* OnlyKnownByTheirNickname
%%* RecurringExtra
* SuspiciouslySimilarSubstitute: For Chachi.
%%* TroubledButCute

[[folder:Krystal "K.C." Cunningham]]
--> '''Played by:''' Crystal Bernard

* BadDate: With Melvin Belvin.
* ChuckCunninghamSyndrome: She disappeared without explanation after Season 10.
%%* CountryCousin
%%* TheDitz
%%* NaiveNewcomer
%%* NiceGirl
* OddFriendship: With Jenny Piccalo.
%%* RecurringExtra
%%* SheCleansUpNicely
%%* ShooOutTheNewGuy
* SuspiciouslySimilarSubstitute: For Joanie.
* TomboyAndGirlyGirl: The Tomboy to Jenny's Girly Girl.

[[folder:Ashley Pfister]]
--> '''Played by:''' Linda Purl

%%* GlamorousSingleMother
* LoveInterest: For Fonzie.
* PutOnABus: After Season 10, Purl left the show because ''Happy Days'' had to cut back on its number of extras. Ashley's sudden disappearance is explained by Fonzie that she had departed with her daughter to get back together with her husband.
%%* SheCleansUpNicely

[[folder:Heather Pfister]]
--> '''Played by:''' Heather O'Rourke

%%* AdorablyPrecociousChild
* PutOnABus: After Season 10, O'Rourke's character was written out because the show had to cut back on its number of extras. Her disappearance was explained that she and her mother had gone back in search of her father.

[[folder:"Bag" Zambroni]]
--> '''Played by:''' Neil J. Schwartz

%%* BookDumb
* ChuckCunninghamSyndrome: Disappeared sometime after season three.
* GentleGiant: In spite of his size and being a member of the Devils, he's fairly nice to Richie and friends.
* VitriolicBestBuds: With Richie, Ralph, and Potsie.

[[folder:Bill "Sticks" Downey]]
--> '''Played by:''' Jack Baker

%%* BlackBestFriend
%%* ShooOutTheNewGuy
* YouKnowImBlackRight: An entire episode revolves around how the entire town is racist towards him, much to the chagrin of Fonzie.

[[folder:Eugene Belvin]]
--> '''Played by:''' Denis Mandel

* AbhorrentAdmirer: To Jenny.
* ButtMonkey: He's picked on by all his classmates.
* ExtravertedNerd: A stereotypical nerd who is clueless about being seen as a loser by the others.