!!Sonic the Hedgehog
The main character of the series. He got his name for his ability to run at the speed of sound.
!!!!!!Voiced by Jaleel White

* {{Badass}}
* BigBrotherInstinct: To Tails, as with most interpretations.
* ButNotTooBlack: Voice actor Jaleel White wanted Sonic to sound "of no race".
* CatchPhrase: "Way past cool!", "Gotta juice", and "Let's do it to it!"
* CoolBigBro: Naturally this to Tails.
* DeadpanSnarker[=/=]ObnoxiousSnarker: He definitely had his moments of this.
* FatalFlaw: The number of times his cockiness had almost gotten him killed…
* {{Flanderization}}: His arrogance and recklessness come at the cost of his competence a lot more in the second season, more than half the episodes revolve around him causing a problem by rushing into things. His originally more playful rivalry towards Antoine also evolved into flat out naked contempt, rarely able to even look at Antoine without bursting into snide insults. Other traits were effected, though were usually more a case of DependingOnTheWriter).
* FragileSpeedster
* IdiotHero: Is fairly BookDumb and often needs Sally's guidance in missions. He has notable showings of resourcefulness however.
* JerkWithAHeartOfGold: Sonic can be ''incredibly'' arrogant and frequently butts heads with the other Freedom Fighters (usually Sally or Antoine, even if the latter ''usually'' deserves it). He is altruistic to a fault however and in his reckless overenthusiasm, he is only looking out for others.
* TheLancer: Creates a strange dynamic where Sally is TheLancer to Sonic being TheLeader, but Sonic is TheLancer to Sally being TheLeader.
* LeeroyJenkins: His recklessness is Lampshaded and the subject of many Aesops in the series.
* MrViceGuy: He's ''very'' prideful.
* RedOniBlueOni: The red to Sally's blue.
* RightWayWrongWayPair: Usually the Wrong Way to Sally's more cautious and meticulous approach, especially in Season Two.
* SmugSuper: To the point some of Robotnik's schemes manipulate his ego.
* SmallNameBigEgo: Sonic is genuinely competent and heroic, however he has no problem exaggerating this in his constant bragging, a lot of times actually screwing up missions due to his overconfidence.
* TotallyRadical: The series ''was'' made in the 90's…
* TrademarkFavoriteFood: Chili-dogs.
* YouAlreadyChangedThePast: In the time-travel episode "Blast to the Past," it is shown that present-day Sonic is responsible for both the loss of most of Snively's hair and Robotnik's roboticized arm.

A young fox who was born with two tails. He can use them to fly by twirling them.
!!!!!!Voiced by Bradley Pierce
* AdorablyPrecociousChild
* BrattyHalfPint: [[DependingOnTheWriter Sometimes.]]
* TheCutie
* {{Keet}}
* [[LittleMissSnarker Little Mr. Snarker]]: On occasion.
* OutOfFocus: Has a much smaller role than he did in [[AdventuresOfSonicTheHedgehog AoStH]].
** He did get a bit more screentime toward the end, though.
* SideKick
* TagalongKid: Though he doesn't get to tag along that often.

!!Princess Sally Acorn
!!!!!!Voiced by KathSoucie

She is the king's only daughter and leader of the Freedom Fighters in ''[[WesternAnimation/SonicSatAM SatAM]]'' and the Archie comics. Based very roughly on "Ricky", the captive squirrel freed from Badniks in the original games (''SonicTheComic'' used a similar character more akin to her original games counterpart as a minor extra early on).

* AllThereInTheManual: Her surname 'Acorn' is never mentioned in ''[=SatAm=]'', though is stated in the show's bible and frequently in the comic books.
* AngerBornOfWorry: Endlessly involving [[LeeroyJenkins Sonic]].
* AscendedExtra: She was based on one of the animals that were freed from the [[{{Mooks}} badniks]] in the original game.
* BadassNormal
* BigGood
* BreakoutCharacter: Sally originally had more of a supporting role in earlier episodes. She arguably became as prominent as Sonic himself later on.
* ByTheBookCop: Was constantly trying to keep Sonic in line and endlessly chastised him for taking risks or going outside plans, regardless of whether or not it worked. Whether or not this was justified varied (especially in the second season, where Sonic made increasing fumbles and put the team in danger). [[NotSoAboveItAll She had her own careless bouts at times however.]]
* CharlesAtlasSuperpower: Implied. In one episode, Sally is replaced by a robot duplicate. When asked for a high five by Sonic, the robot slaps him hard enough to knock him off his feet in full view of Rotor and Bunnie. While Sonic's surprised, that display isn't what tips them off that Sally was replaced, meaning that Sally has above average strength for her size.
* CloserToEarth: Albeit balanced by [[NotSoAboveItAll occasional bouts of arrogance and childishness]] [[NotSoDifferent equal to Sonic]].
* TheComicallySerious: Often when paired against Sonic, though she is often more jovial than most examples.
* CoolBigSis: To Tails.
* DeadpanSnarker: Oh yes.
* DisappearedDad
* DistressBall: Despite being TheSmartGuy of the team, she often got captured rather handily.
* DistressedDamsel: Played with. She is one of the most competent Freedom Fighters, but also one of Robotnik's favorite hostage choices.
** Makes more sense when you consider that she's the leader of the Freedom Fighters. One great step to defeating a resistance is to crush its morale. What's a good way to do that? Take out the leader.
* TheDitherer: A few episodes play her as this, especially when conflicting with the very blunt Sonic. Less liable to happen in the Second Season, where she strategizes more aptly and usually acts as [[PositiveDiscrimination a far more competent alternative than Sonic's recklessness]], though still appears on odd occasions.
* DontCallMeSir: She is a Princess, but prefers people not to address her as such, as her title is rather a hollow one while the kingdom is under Robotnik's control.
* EarlyInstallmentWeirdness: While her personality is largely the same, the pilot's version of Sally has a pink color scheme (with black hair) and [[VocalEvolution a higher more childlike voice]]. This design would be used in initial comics as well, which initially used early concept work for the show to develop upon.
* EverythingsBetterWithPrincesses
* FatalFlaw: Most of Sally's rare NotSoAboveItAll moments were triggered by her prideful over competitiveness to prove Sonic wrong.
* TheFinickyOne: In contrast to the brash reckless Sonic.
* {{Flanderization}}: She had her positive aspects exaggerated, starting off as a NotSoDifferent Foil for Sonic in season 1 and then practically acting as his HyperCompetentSidekick in season 2 to accommodate his increased recklessness.
* {{Foil}}: Largely to Sonic, her meticulous and cautious personality contrasting Sonic's spontaneous and reckless persona. [[NotSoDifferent Both share a similar arrogance and ego]] that only fuels their bickering more. Also to Bunnie, but less so.
* GrumpyBear: Downplayed case. While still friendly and having enthusiastic moments, Sally was generally the most irritable and acerbic of the main team.
* [[HonoraryUncle Honorary Aunt]]: To Tails, who calls her "Aunt Sally".
* InferioritySuperiorityComplex: Sally is often [[ControlFreak overbearing]] and [[DeadpanSnarker condescending]] to her team about their blunderings, especially Sonic, though under pressure will often admit she is just terrified of what Robotnik might do to them. Spotlighted in "Sonic Racer".
* JackOfAllStats: Sally is the leader and tactician for the Freedom Fighters, she is also a hacking and computing expert, has almost as prominent mechanical skills as Rotor and frequently acts as a TeamMom. The only thing she seems inept in is physical power ([[BadassNormal though this was utilized more in the comic adaptation]]). This arguably also played part in her SpotlightStealingSquad status, since she could often take the place of other characters in a story with a compressed cast.
* MissingMom
* ModestRoyalty: As she herself puts it: "In the Great Forest, such titles are meaningless."
* OnlySaneWoman: Definitely has traits of this in season 2, especially when frustrated by Sonic or Antoine.
* PositiveDiscrimination: Accused of such in the cartoon, especially in season 2, although it was more like SurroundedByIdiots. Often came off as the most competent and least flawed Freedom Fighter, with a lot of {{Idiot Ball}}s performed by Sonic having been due to [[CanonSue ignoring Sally's advice]].
* RealNameAsAnAlias: When she travels back in time and meets her past self, she introduces herself as "Alicia". Past Sally comments that's her middle name.
* {{Red Headed Hero}}ine
* RedOniBlueOni: The blue to Sonic's red.
* RightlySelfRighteous: Sally often lashes and condescends to Sonic for his potentially reckless and destructive approach. She's usually proven right.
* RightWayWrongWayPair: Usually the Right Way to Sonic's spontaneous (and usually reckless) approach, especially in Season Two.
* RoyalsWhoActuallyDoSomething
* ShesAManInJapan: The squirrel she was based on was male in the Japanese version.
* SpotlightStealingSquad: She's used as a co-lead in ''every'' second season episode (absent in only one Antoine short). It's not rare for her to be Sonic's ''only'' team mate in some episodes.
* TheStrategist
* SurroundedByIdiots: More so in the second season, where more emphasis is put on her competence over the other Freedom Fighters. She had to more often stop Sonic from [[NiceJobBreakingItHero endangering himself via arrogance]], or put up with Antoine or Dulcy's blundering. This appears in the first season too, but is more subtle ([[NotSoAboveItAll and she is more prone to acting up herself]]).
* TeenGenius
* TomboyAndGirlyGirl: Tomboy to Bunnie's Girly Girl.
* TomboyPrincess
* TooCleverByHalf: Intelligent and resourceful, but occasionally competes with [[SmugSuper Sonic]] in terms of haughtiness.
* TrueBlueFemininity
* Tsundere: She's a Type A with Sonic and Antoine and a Type B with pretty much everyone else in the Freedom Fighters.
* TsurimeEyes
* WeakButSkilled: As noted in JackOfAllStats and Distressed Damsel, she's skilled but gets captured a lot.
* [[WetBlanketWife Wet Blanket Girlfriend]]: Downplayed case. Sally's humorless, uptight and constantly on Sonic's back for showing off, but in a dystopian world where his recklessness often risks getting him robotocized or worse by an sadistic EvilOverlord, she's usually in the right to.
* WomenAreWiser: While she has some shortcomings, comparatively, she is almost always Sonic's moral and intellectual superior.
* WellExcuseMePrincess: With Sonic.

!!Antoine Depardieu
A coyote who was once a palace guard.
!!!!!!Voiced by RobPaulsen

* TwoGuysAndAGirl: In Warp Sonic. Antoine is Sonic's rival for Sally's affection.
* BerserkButton: He will ''not'' let you get away with mangling French cooking. ''Especially'' if you try to make escargot... with margarine.
* ButtMonkey
* CheeseEatingSurrenderMonkeys
* ChildSoldier
* DirtyCoward
* DumbBlonde
* {{Flanderization}}: He was originally rather pompous and cowardly, but had some amount of lucidity and nobility. By Season Two however he is more or less a full time StrawLoser for Sonic, barely able to spend five seconds without saying or doing something stupid or narcissistic and acting like a full blown DirtyCoward. In the comics, his last name is D'Coolette and he uses a sword in battle.
* FreakOut: Antoine has one hell of a freakout in "The Odd Couple" where he is forced to share his house with Sonic for a night.
* {{French|Jerk}} JerkWithAHeartOfGold
* GratuitousFrench
* HopelessSuitor: To Sally.
* InterspeciesRomance: His unrequited crush on Sally.
* {{Leitmotif}}: He has his own theme tune in Season 2.
* TheLoad: He is incredibly cowardly and almost never contributes anything of value, yet for some reason they frequently bring him along on action missions.
* LovableCoward: When not an outright DirtyCoward anyway.
* NoRespectGuy: In season 2.
* PluckyComicRelief: In season 1.
* SpotlightStealingSquad: The star of the second season shorts. Also often Sonic's second team mate in missions.

!! Bunnie Rabbot
!!!!!!Voiced by Creator/ChristineCavanaugh

A cyborg rabbit who filled the role of TheBigGuy in the FiveManBand.

* ActionGirl: Until [[{{Flanderization}} Season 2]]
* BadassAdorable
* [[TheBigGuy The Big Girl]]
* BoobsOfSteel
* CoolBigSis: To both Sally and Tails.
* CursedWithAwesome: A victim of partial Robotocization, which grants her amazing strength. She hates it.
* CuteBruiser
* DemotedToExtra: In Season Two.
* FauxActionGirl: In the second season.
* GoodBadGirl: A G-rated version--she's flirty and wears a skimpy outfit and makeup, but a FemmeFatale she ain't.
* HollywoodCyborg
* [[HonoraryUncle Honorary Aunt]]: To Tails who calls her "Aunt Bunnie".
* NiceGirl: She's probably the nicest of the Freedom Fighters next to Rotor.
* OutOfFocus: She stays behind a lot more in the Second Season. Even the odd time she takes part she rarely acts as little more than [[TheLoad a generic teammate]].
* PunnyName
* SouthernBelle: Much more tomboyish than most examples.
* SuperStrength: Her metal arm gives her this.
* SweetHomeAlabama
* TomboyAndGirlyGirl: Girly Girl to Sally's Tomboy.
** TomboyWithAGirlyStreak

!! Rotor the Walrus
!!!!!!Voiced by Mark Ballou (Season 1), Cam Brainard (Season 2)

A Walrus who served as the team's [[TheSmartGuy smart guy]].

* {{Adorkable}}: Especially in early episodes.
* AmbiguousDisorder: Well, as much as they could get away with in a kids show, but Rotor prefers being alone and spends a little too much time on his niche, inventing things. His vocal inflections and overall social behavior are somewhat off as well.
* ArtEvolution: While several other characters go through minor design changes, Rotor's are most evident, gradually becoming chubbier and more anthropomorphic. He goes through at least two drastic design changes throughout the show's run (once after the pilot, another during the second season).
* DemotedToExtra: In season two.
* EarlyInstallmentWeirdness: Rotor has a goofier design with a purple color scheme in the pilot episode. Similar to the Sally example this would be utilized in the comics (though actually was kept as his permanent design in that media). His design would be changed again halfway through the show's run.
* GadgeteerGenius
* GeniusBruiser
* MrFixIt
* NiceHat: It's red in the cartoon, and yellow in the pilot and comics design.
* OutOfFocus: In season two.
* TheSmartGuy

!! Dulcy the Dragon
!!!!!!Voiced by Creator/CreeSummer

A [[InstantAwesomeJustAddDragons dragon]] who was introduced in season 2.

* ActionGirl
* CaptainCrash: She ''really'' needs to work on her landings.
* CousinOliver
* GiantFlyer
* InstantAwesomeJustAddDragons
* [[spoiler: [[LastOfHisKind Last Of Her Kind]]]] [[spoiler: Thanks to Robotnik, she is quickly approaching this.]]
* MissingMom: Her mother, Sabina, was captured and roboticized.
* RememberTheNewGuy: She just suddenly appears in the second season premiere as if she was one of the Freedom Fighters the whole time. Much like the other Freedom Fighters, her back story wasn't given

!! Uncle Chuck
!!!!!!Voiced by William Windom

Sonic's uncle who was roboticized when Sonic was very young.

* BrainwashedAndCrazy
* CoolOldGuy
* GadgeteerGenius
* HeroicSacrifice: [[spoiler: He delayed Robotnik's attempts to roboticize Sonic and his friends when they were children so they could escape, but he was caught and roboticized in the process.]]
* HonoraryUncle: Everyone refers to him as "Uncle Chuck".
* MiniatureSeniorCitizens: He was pretty short compared to the younger King Max.
* TheMole
* NiceJobBreakingItHero: [[spoiler: He was the original inventor of the roboticizer, which was made to help old people live longer. Unfortunately, it had a side effect of wiping their minds clean and they had no will of their own, which is why Robotnik stole the idea from Chuck after he thought he destroyed the blueprints for it.]]
* OnlySaneMan
* RedEyesTakeWarning: [[spoiler: At first.]]
* TheSmartGuy
* [[PapaWolf Uncle Wolf]]: See HeroicSacrifice.

!![[spoiler:Julian]] Robotnik
!!!!!!Voiced by Creator/JimCummings

The BigBad, responsible for overthrowing the king of Mobotropolis, and converting the city into a heavily industrialized center. [[EvilOverlord He rules with an iron fist]], roboticizing the entire populace in order to quell any and all rebellion.

* AndThereWasMuchRejoicing: Admit it, you all cheered along with the Freedom Fighters when this bastard got killed in the finale. Even Snively was glad that Robotnik kicked the bucket.
* AdaptationalVillainy: Before this show aired, Robotnik was either portrayed as LaughablyEvil or a [[LargeHam Large]] [[AdventuresOfSonicTheHedgehog Ham]], SatAM not only showed his actions in a more serious and sinister light but it also made him a [[NotSoHarmlessVillain legitimate threat]].
* AxeCrazy: Can be this at times, mostly in the second season.
* BadAss: This Robotnik is one of the few incarnations to have actually taken over the world! That alone is pretty badass in it's own right but this incarnation practically turns it ''[[UpToEleven up to eleven]]'' by also giving him a baritone voice, an even ''more'' badass mustache, a pair of black red eyes, and tops it off by making him ''half-cyborg''!
** BadassBaritone: Probably the most kickass voice you've ever head.
* BaldOfEvil: Naturally, there is not a single hair on his forehead. Interestingly, it seems he never had hair to begin with.
* BigBad: Though this was going to switch over to Naugus in Season 3.
* BlackEyesOfCrazy: They’re black pits with ominous glowing red lights.
* CardCarryingVillain: He’s quite boastful of his evil.
* TheComicallySerious: He does have his moments every now and then.
* DangerouslyGenreSavvy: In Season One, he has noticeable bouts of this, even playing on Sonic's flaws at times, and at least once actually ''would'' JustShootHim. [[{{Flanderization}} Not as prominent]] in Season Two (see StupidEvil).
* EmperorScientist: [[DownPlayedTrope Surprisingly downplayed]] considering who we're talking about here. He's far more emperor than he is scientist here.
* EvilOverlord: There's a reason the Freedom Fighters want him overthrown.
* EvilSoundsDeep: Deep voice? Check. Absolutely monstrous? Check!
* FatBastard: He's definitely one of the bigger Robotniks, even larger than the Adventures of Sonic the Hedgehog incarnation!
* FauxAffablyEvil: He appears to polite and gentlemanly but don't let that fool you. He's notoriously known for his skills of deception!
* ForTheEvulz: He gets a disturbing, almost lustful looking enjoyment every time he causes pain and suffering around him (it just makes him [[MemeticMutation "tingle all over"]]).
* HollywoodCyborg: His arm was roboticized.
* InNameOnly: There are about 5 similarities that this Robotnik has with his game counterpart. His name, the fact that he uses robots to conquer things, that he turns animals into robots, his BadassMustache, and the colors of his wardrobe. Remove his name and wardrobe coloring and this man would be a completely separate character.
* KilledOffForReal: Heavily implied to be this in the [[GrandFinale Series Finale]].
** [[spoiler: Would have been subverted for the Third Season, where he would have been revealed to have survived the explosion and got teleported into the Void.]]
* KnightOfCerebus: Unlike most other counterparts of the doctor, Robotnik's actions are depicted in a far more serious and sinister light, his comedic aspects being more subtle and sparse. Lightened in the second season, where we are introduced to an entity that makes even him cower in fear.
* LargeHam: While not as extreme as his [[AdventuresOfSonicTheHedgeHog previous incarnation]], this Robotnik was still pretty hammy, with his heavy breathing, low voice, and long pauses. Though these qualities were mostly present in the second season.
* ManipulativeBastard: Indeed! There's probably not a single character in the whole show that didn't get used by Robotnik.
* NotHisSled: His name is actually ''Julian''.
* RedEyesTakeWarning: The red lights in his eyes flare when he gets pissed.
* [[RedRightHand Robotic Left Arm]]: It's not the only robotic thing about him either.
* StupidEvil: More so in Season 2. While in his past he was able to make lengthened charades to maintain his plans for power, by Season Two, Robotnik just can't resist [[KickTheDog Kicking The Dog]] at the most inappropriate time.
* TheSociopath: A very chilling example. Robotnik only cares about himself and his empire. Everything else is just something for him to use or destroy.
* TookALevelInBadass: Compared to other incarnations at the time of course.
* UnwillingRoboticisation : His modus operandi.
* VillainousBreakdown: "I ''hate'' that hedgehog. I hate him! ''I hate him''! ''HATE HIM''! HATE! HATE! ''HATE!!'' '''''HAAAAATTTTEEEEEEEE'''''!!!!"
* XanatosSpeedChess: Very good at this.

!! Snively
!!!!!!Voiced by CharlieAdler

Robotnik's nephew and right-hand man. [[BadBoss Often used as the doctor's punching bag]], Snively has gained a conniving and ambitious personality intent on overthrowing his uncle.

* ButtMonkey: Starting in Season 2 he was regularly used as a punching bag by Robotnik and often treated as a joke by the Freedom Fighters. Granted, in that season [[TheStarscream his true conniving traits have been shown.]]
* TheDogBitesBack: WordOfGod states Snively would have betrayed Robotnik in the third season and joined the Freedom Fighters.
* SycophanticServant: In season One, he is far less hateful towards his uncle and even seems to enjoy getting his rare praise.
* DirtyCoward: [[MeaningfulName As you'd expect]].
* GagNose
* HairTodayGoneTomorrow
* IneffectualSympatheticVillain: Snively is a treacherous weasel whose ruthlessness only pales compared to his uncle. However in action he is a pitiful, bumbling coward that Sonic and even the highly cautious Sally have problems viewing as a serious threat. He's got a terrifying brain, but in terms of brawn, you can tell by his spindly, twig-like physique he's a pushover, and would be quite justified in calling him spineless.
* KarmaHoudini
* LaughablyEvil: Not much more pleasant than Robotnik, though far more blundering and goofy.
* LaughingMad: At the end of the finale, at which point it appears that he's gone stark raving bonkers.
* NotSoHarmlessVillain: While often seen as far more pathetic than Robotnik by the Freedom Fighters, he actually gotten closer to discovering and conquering Knothole than his uncle did. In the planned Third Season he would have briefly took control of Robotropolis, though would lose control later on.
* ScreamsLikeALittleGirl: As seen [[http://www.youtube.com/watch?v=Gmd0HnwlpQE here]].
* ServileSnarker: Often makes snide remarks about his uncle behind his back, especially in Season 2.
* TheStarscream: He constantly grumbles over having to serve the Doctor, but doesn't actually attempt to harm him. By the Second Season he has blatantly come to resent his uncle's abuse and makes a few shrewd plans behind his back (he once attempted an attack on Knothole while Robotnik was gone, as well as making alterations to his base that would ultimately save his life when it was destroyed). [[spoiler: He simply plays along until Robotnik is electrocuted in the final episode, then is seen donning his uncle's trademark yellow cape.]] He does, however, resemble Starscream in [[HeyItsThatVoice voice]], especially considering his voice is done by Creator/CharlieAdler.
* YouHaveFailedMe: Robotnik attempts this indirectly in "The Doomsday Project", leaving him to die in his imploding base out of spite. Snively however had predicted as much from his uncle and had made his own methods of escape.
-->'''Robotnik:''' Only room for one, Snively! ''*closes escape pod*''
-->'''Snively:''' You don't give me enough credit, Julian!

!! King Acorn
!!!!!!Voiced by TimCurry

Former King of Mobotropolis and father of Princess Sally. Deposed by Robotnik and exiled to the Void.

* CoolOldGuy: Not as old as Uncle Chuck, but this still counts.
* TheGoodKing
* HorribleJudgeOfCharacter: Granted Robotnik was a manipulative mastermind, but anyone who puts his entire army in the hands of [[ObviouslyEvil that guy]] isn't the most savvy of people.
* RoyalsWhoActuallyDoSomething

!! Ixis Naugus
!!!!!!Voiced by Creator/MichaelBell

A wizard from the Void. Though he was antagonistic only towards Robotnik, he was slated to become season three's BigBad.

* AffablyEvil
* BigBad: Was meant to be this for Season 3.
* EvilSorcerer
* KnightOfCerebus: Implied as such, had his role as BigBad in the Third Season ever took place. This is the guy who makes Robotnik ''quiver in terror''.
* KnightTemplar
* SealedEvilInACan: In both [=SatAM=] and the comics, Naugus spent years trapped in the Void/Zone of Silence (the name depends on the continuity). In the comics, he escaped and was resealed several times before escaping permanently. In the cartoon, he escapes once but willingly returns once he realizes all the time spent in the Void made him unable to withstand being out of it for long.