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

[[foldercontrol]]

[[folder:Arthur "The Fonz/Fonzie" Fonzarelli]]
'''Played by:''' Henry Winkler
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* AccidentalMarriage: With Jenny Piccalo in "Bride and Gloom." [[spoiler:Later, it turns out that the marriage was not really valid.]]
* TheAce
* {{Badass}}
** BadassAndChildDuo: With Spike and [[spoiler:in the finale, his adopted son, Danny.]]
** BadassBeard: One episode has Fonzie growing one. When Fonzie decided to shave it off at the end, Potsie collects some of the leftover hair to sell to a waiting crowd of girls outside.
** BadassBiker
** {{Badbutt}}
* BerserkButton: You wanna find out what happens when you mess with his ride, [[TooDumbToLive it's your funeral.]]
** And if that doesn't do it for you, feel free to mess with Joanie Cunningham too.
* BigBrotherMentor: To Richie, Potsie and Ralph. Later to Chachi.
* 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.
* BillingDisplacement: Averted when the producers wanted to change the name of the show to Fonzie's Happy Days to reflect The Fonz's growing popularity. Both Ron Howard and creator Garry Marshall threatened to leave the show if the producers did so, and even Henry Winkler himself objected to this proposal, feeling that Ron Howard was the real star of the show.
* BreakoutCharacter: AND HOW! Fonzie's probably the most famous example of this trope. The trope was even originally named "The Fonz."
* TheCasanova
* CatchPhrase:
** Ayyyyyyyyyy!!!!!
** Sit on it!!
** Whoa!
* TheCharmer
* ChickMagnet
* CoolBike
* CoolTeacher: In later seasons he becomes the new teacher of auto mechanics at Jefferson High School.
* DeadpanSnarker
* DoubleDate: He and Richie with LaverneAndShirley in "A Date with Fonzie."
* 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."
* {{Expy}}: Winkler displayed early shades of The Fonz as Butchey Weinstein in ''The Lord's of Flatbush.''
* FakingTheDead: "Fonzie's 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.
* FonzarelliFix / MachineEmpathy / PercussiveMaintenance: The [[Administrivia/NamingATrope Former]] [[TropeNamers Trope Namer]] for this ability.
* FourPhilosophyEnsemble: The Realist.
* FreudianTrio: TheEgo
* GaggingOnYourWords: He is physically incapable of saying that he's wrong.
* GenreSavvy
* GirlOfTheWeek
* GreaseMonkey
* 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
* TheHerosBirthday: "The Second Anniversary Show", "The Sixth Sense", "Hi-Yo Fonzie, Away!"
* HeterosexualLifePartners: With Richie.
* HiddenHeartOfGold
* HonorBeforeReason: "The Fonzarelli Code."
* IOweYouMyLife: Potsie saves his life in one episode. All he wants in return is to 'pal around' with the Fonz ... all the time.
* JackOfAllTrades
* LadykillerInLove: First with Pinky Tuscadero in the premiere episodes of Season 4. In season 10, with Ashley Pfister.
* TheLancer: But after Richie left, he became TheHero.
* LargeHam: After Season 2, due to the switch to a studio audience format.
* LastNameBasis: Refers to most of his friends this way.
* LikesOlderWomen: On occasion.
* LockedInARoom: With Richie, Ralph, and Potsie in "Time Capsule."
* LongRunnerCastTurnover: One of the four survivors.
* MadeOfIron
* 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
* NewPowersAsThePlotDemands
* TheNicknamer
* NobodyTouchesTheHair
* 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
* OnlyKnownByTheirNickname
* ParentalAbandonment
* ParentalSubstitute: For Chachi.
* ThePornomancer
* PowerTrio: TheKirk
* PromotionToOpeningTitles: In Season 2, to reflect on his growing popularity with audiences.
* TheQuietOne / SilentSnarker: In the first two seasons, mainly the first.
* ReallyGetsAround
* RenaissanceMan
* RuleOfCool: The Fonz abides by this law.
* SensitiveGuyAndManlyMan: Manly Man to Richie's Sensitive Guy.
* SexyManInstantHarem
* [[TallDarkAndSnarky Short, Dark And Snarky]]
* ShotgunWedding: He and Richie romance the daughters of a local farmer in one episode with this appropriate title.
* ShowStopper
* SmugSuper
* 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
* 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: Sometimes.
* TroubledButCute
* 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)
* WiseBeyondTheirYears: That's ''why'' he's the Fonz.
[[/folder]]

[[folder:Richard "Richie" Cunningham]]
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'''Played By:''' Ron Howard

* {{Adorkable}}
* TheAllAmericanBoy
* AloofOlderBrother
* BackForTheFinale
* BewareTheNiceOnes: Sometimes.
* BigBrotherInstinct: Towards Joanie.
* BillingDisplacement: Averted when the producers wanted to change the name of the show to Fonzie's Happy Days to reflect The Fonz's growing popularity. Both Ron Howard and creator Garry Marshall threatened to leave the show if the producers did so, and even Henry Winkler himself objected to this proposal, feeling that Ron Howard was the real star of the show.
* 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: Adding "BUCKO!" to the end of an exclamation at someone to demonstrate his displeasure at them.
* CharacterSignatureSong: "Blueberry Hill."
* ChildhoodFriends: With Potsie.
* DoubleDate: He and Fonzie with 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
* {{Expy}}: Many fans insist that Richie is the teenager [[TheAndyGriffithShow Opie]] would become. [[JustifiedTrope Justified]] since they are both played by Ron Howard.
* FourPhilosophyEnsemble: The Cynic.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Melancholic.
* FreudianTrio: TheSuperego
* GentlemanAndAScholar
* HappilyMarried: To Lori Beth, as of Season 8.
* TheHeart
* TheHero
* HeroicSpirit
* HeterosexualLifePartners: With Fonzie.
* 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 / MoralityChain: For Fonzie.
* NiceGuy
* NoPartyGiven: Averted in "The Not Making of the President", where he supports Democratic candidate, Aldai Stevenson.
* OfficialCouple: With Lori Beth.
* OnlySaneMan: Sometimes.
* PassingTheTorch: When Richie left, Fonzie became the shows main character.
* PowerTrio: TheSpock
* PutOnABus: During Seasons 8-10.
** TheBusCameBack: In a couple of episodes of the last season.
* RedHeadedHero
* 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.
* ShotgunWedding: He and Fonzie romance the daughters of a local farmer in one episode with this appropriate title.
* StraightMan
* 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]]

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

* AndStarring
* BerserkButton: Don't you ''dare'' mess with his family. And yes, that does extend to Fonzie.
* BumblingDad: At times.
* TheComicallySerious
* CoolOldGuy
* DadTheVeteran: He was a chef during World War II.
* DeadpanSnarker / TheSnarkKnight
* GenreSavvy
* GoodParents
* HappilyMarried: To Marion.
* LongRunnerCastTurnover: One of the four survivors.
* 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
* OverprotectiveDad: Towards Joanie.
* PapaWolf
* ParentExMachina
* ThePatriarch
* ReasonableAuthorityFigure
* StandardFiftiesFather
* SurroundedByIdiots: Everyone who's not family.
* TeamDad
[[/folder]]

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

* AllLovingHero: Probably the nicest character on the show.
* BerserkButton: Don't you ''dare'' mess with her family. And yes, that includes Fonzie.
** She has also been the only character ever to tell Fonzie to "sit on it."
* BewareTheNiceOnes
* FirstNameBasis: The only one who calls Fonzie by his first name.
* FieryRedhead: When she wants to be.
* GoodParents
* HappilyMarried: To Howard.
* {{Housewife}}
* LongRunnerCastTurnover: One of the four survivors.
* MamaBear: Sometimes.
* MoralityPet: For Fonzie.
* NiceGirl
* ParentalSubstitute: For Fonzie.
* ParentExMachina
* TeamMom
* WomenAreWiser
[[/folder]]

[[folder: Joanie Louise Cunningham-Arcola]]
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'''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.
* TheCastShowoff: She and Chachi become this starting in "Broadway It's Not" of Season 8, even going on to have their own short-lived spinoff, ''Joanie Loves Chachi'' to showcase their singing skills. Downplayed in Season 11, when she appears content to go on with her life as a teacher.
* TheChick
* 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 karate.
* DangerousSixteenthBirthday: Joanie's original date cheated on her with another girl.
* DaddysGirl
* DeadpanSnarker / LittleMissSnarker
* 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]]: Leukine.
* 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.
* PromotionToOpeningTitles: In season 3.
* PutOnABus: For the spinoff show, ''Joanie Loves Chachi.''
** TheBusCameBack: In the last season.
* RelationshipUpgrade: She and Chachi go out on their first date near the end of Season 7.
* ShesAllGrownUp
* 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]]

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

* {{Adorkable}}
* AlliterativeName
* TheArtifact: After Richie and Ralph left the show.
* BoundAndGagged: In "Fonzie's Funeral Part 2".
* ButtMonkey
* 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.
* CastingGag / RealLifeRelative: Potsie was in a relationship with Jennifer Jerome (played by Lorrie Mahaffey) for several seasons in-universe; in real life, Anson Williams was married to Mahaffey from 1978 to 1986.
* TheCastShowoff
* CatchPhrase: Potsie used to say "man oh man, you got it made in the shade" to Richie in the first two seasons.
* ChildhoodFriends: With Richie.
* ChuckCunninghamSyndrome: For the finale, at least. No explanation is given as to why one of the show's original main characters failed to show up.
** In real life, Anson Williams had left the show and he managed to get some of the last season's episodes done in 1983 before his character vanished entirely.
* ComicallyMissingThePoint: Very often.
* CommutingOnABus / WhyDoYouKeepChangingJobs: 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.
* DemotedToExtra: Starting Season 8, his appearances became much less frequent.
* TheDitz: More so as the seasons went on.
** GeniusDitz: Potsie's an excellent singer and was smart enough to study psychology in college, but thinks that a pair of scissors is ''two.''
* 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}}: From Richie's worldly best friend to a bumbling, dim-witted sidekick.
* FourPhilosophyEnsemble: The Optimist.
* FourthDateMarriage: Averted in "Potsie Gets Pinned" when he declares that he wants to marry Jennifer Jerome after just one date.
* FreudianTrio: TheId (shared with Ralph)
* TheFriendNobodyLikes: In later seasons.
* HeterosexualLifePartners: With Ralph. Originally with Richie.
* HilariouslyAbusiveChildhood / ParentalNeglect: 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 the four survivors.
* NotImportantToThisEpisodeCamp: Countless times in the last four seasons.
* OddCouple: The Felix to Ralph's Oscar as roommates in their apartment.
* OnlyKnownByTheirNickname
* PowerTrio: TheMcCoy (shared with Ralph)
* TheThingThatWouldNotLeave: In later seasons. He would often overstay his welcome after following Howard home from the hardware store; Howard would look for ways to get him to leave (convincing Fonzie to take him to play ski ball, tell him to walk out the door and then slam it on the confused Potsie, etc).
* ThisIsMySide: He and Ralph play this straight in their apartment when bad advice from Richie goes too far.
* ThoseTwoGuys: With Ralph.
* TookALevelInDumbass
* 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.
* WellDoneSonGuy: Subverted. Most of the time he doesn't even seem to care whether his father notices him or not.
[[/folder]]

[[folder:Ralph Malph]]
[[quoteright:191:http://static.tvtropes.org/pmwiki/pub/images/download_12_3048.jpg]]
'''Played by:''' Donny Most

* AmbiguouslyJewish: [[JustifiedTrope Justified]] since Most is Jewish in real life.
* BoundAndGagged: In "Fonzie's Funeral Part 2".
* ButtMonkey
* CasanovaWannabe
* CatchPhrase: "I still got it!"
* ClassClown
* {{Cloudcuckoolander}}
* ComicallyMissingThePoint: Sometimes.
* FieryRedhead
* {{Flanderization}}: His cowardice and fondness for telling jokes.
* FourPhilosophyEnsemble: The Apathetic.
* FourTemperamentEnsemble: Sanguine.
* FreudianTrio: TheId (shared with Potsie)
* FunPersonified
* GenreSavvy
* 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
* LockedInARoom: With Richie, Fonzie, and Potsie in "Time Capsule."
* LovableCoward
* NiceHat: In earlier seasons.
* OddCouple: The Oscar to Potsie's Felix as roommates in their apartment.
* PluckyComicRelief
* PowerTrio: TheMcCoy (shared with Potsie)
* PungeonMaster
* PromotionToOpeningTitles: In Season 2.
* PutOnABus: Along with Richie during Season 8.
** TheBusCameBack: In one episode of the last season.
* RepetitiveName
* ThisIsMySide: He and Potsie play this straight in their apartment when bad advice from Richie goes too far.
* ThoseTwoGuys: With Potsie.
* TrueCompanions: With Richie, Potsie, and Fonzie.
* WackyGuy
* WrittenInAbsence: Ralph's absence from the finale was explained earlier in the same season that Ralph had returned to college to become an optometrist.
[[/folder]]

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

* ActingForTwo: Molinaro also plays Al's identical twin brother, Father Anthony Delvecchio.
* BackForTheFinale
* 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.
* FourthDateMarriage: [[spoiler: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]]

[[folder:Charles "Chachi" Arcola]]
[[quoteright:185:http://static.tvtropes.org/pmwiki/pub/images/download_11_7637.jpg]]
'''Played by:''' Scott Baio

* AscendedExtra
* BadLiar
* TheCasanova: According to Fonzie, it runs in the family.
* TheCastShowoff: He and Joanie become this starting in "Broadway It's Not" of Season 8, even going on to have their own short-lived spinoff, ''Joanie Loves Chachi'' to showcase their singing skills. Downplayed in Season 11, when Joanie gives up her singing career to become a teacher.
* CatchPhrase: "Wa, wa, wa." Dropped as he grew up.
* ChickMagnet
* CousinOliver
* DeadpanSnarker: On occasion.
* 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.
* HeCleansUpNicely
* KidAnova
* TheLancer: To Fonzie in Seasons 8-9 and 11.
* LoveInterest
* MrFanservice: The character was very popular with teenage girls.
* OfficialCouple: With Joanie.
* OnlyKnownByTheirNickname
* PromotionToOpeningTitles: In Season 6.
* PutOnABus: For the spinoff show, ''Joanie Loves Chachi.''
** TheBusCameBack: In the last season.
* 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.
[[/folder]]

[[folder:Other Characters]]
!!Chuck Cunningham (Gavan O'Herlihy, Randolph Roberts)

* AlliterativeName
* AloofOlderBrother
* ChuckCunninghamSyndrome: The Trope Namer, unfortunately.
* TheDitz / DumbJock: What little screentime he got before he became a trope, they seemed to paint him as this: for instance, he couldn't figure out that the Christmas lights weren't working because they weren't plugged in.

!!Matsumo "Arnold" Takahashi (Pat Morita)

* AsianStoreOwner: A notably early television example.
* ButNotTooForeign / FunnyForeigner: 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.
* {{Cloudcuckoolander}}
* OnlyKnownByTheirNickname
* PutOnABus: Left his post at Arnold's after his wedding (see below), leading to Al Delvecchio taking his place.
** TheBusCameBack: Made sporadic guest appearances in 1977 and 1979 before returning full-time in 1982.
** ChuckCunninghamSyndrome: Then, he vanished just as suddenly after the first episode of Season 11.
* SignatureLaugh: "BAAHAHAHAHAHAHAHAHAH!" Lampshaded in his 1982 return appearance.
* WeddingDay: A traditional Oriental ceremony to "Momo" Takahashi in the season three finale.
* YouNoTakeCandle

!!Lori Beth Allen-Cunningham (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
* 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.
* PutOnABus: After Season 9.
** TheBusCameBack: In a couple of episodes of the last season.
* RecurringExtra: In Seasons 5-7.
* WeddingDay: With Richie (over the telephone) in "R.C. and L.B. Forever."
* YouLookFamiliar: Lynda Goodfriend previously appeared in two episodes as "Kim", a girlfriend of Ralph's.

!!Jenny Piccalo (Cathy Silvers)

* AccidentalMarriage: With Fonzie in "Bride and Gloom." [[spoiler:Later, it turns out that the marriage was not really valid.]]
* AllWomenAreLustful: ''No kidding.''
* AttentionWhore
* BackForTheFinale
* BookDumb
* TheChick
* {{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
* TheGhost: Until Season 8. Previously she was frequently mentioned by Joanie.
* GoodBadGirl
* HeWhoMustNotBeSeen: Until Season 8.
* HormoneAddledTeenager: Very, ''very'' much so.
* JerkWithAHeartOfGold
* LightFeminineAndDarkFeminine: The Dark to Joanie's Light.
* LovableSexManiac
* OddFriendship: With K.C. Cunningham.
* PromotionToOpeningTitles: In Season 10.
* ReallyGetsAround
* RecurringExtra: In Seasons 8 and 9.
* SmallNameBigEgo
* [[StalkerWithACrush Stalker With Many Crushes]]
* TomboyAndGirlyGirl: The Girly Girl to K.C.'s Tomboy.

!!Roger Phillips (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."

!!Leopold "Flip" Phillips (Billy Warlock)

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

!!Krystal "K.C." Cunningham (Crystal Bernard)

* BadDate: With Melvin Belvin.
* ChuckCunninghamSyndrome: She disappeared without explanation after Season 10.
* [[CountryCousin Country Cousin Oliver]]
* TheDitz
* NaiveNewcomer
* NiceGirl
* OddFriendship: With Jenny Piccalo.
* RecurringExtra
* SheCleansUpNicely
* ShooOutTheNewGuy
* SuspiciouslySimilarSubstitute: For Joanie.
* TomboyAndGirlyGirl: The Tomboy to Jenny's Girly Girl.
* YouLookFamiliar: Bernard previously appeared in Season 9 as a character named Mikki.

!!Ashley Pfister (Linda Purl)

* GlamorousSingleMother
* LoveInterest: For Fonzie.
* PutOnABus / RealLifeWritesThePlot / WrittenInAbsence: 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
* YouLookFamiliar: Purl previously guest starred as a girlfriend of Richie's.

!!Heather Pfister (Heather O'Rourke)

* AdorablyPrecociousChild
* PutOnABus / RealLifeWritesThePlot / WrittenInAbsence: 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.

!!"Bag" Zombroski (Neil J. Schwartz)

* BookDumb
* 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.

!!Bill "Sticks" Downey (Jack Baker)

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

!!Eugene Belvin (Denis Mandel)

* AbhorrentAdmirer: To Jenny.
* ButtMonkey
* ExtravertedNerd
[[/folder]]