Characters from the manga and anime series ''Nurse Angel Ririka SOS''.
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!!'''Ririka Moriya - Nurse Angel'''
!!! Voiced by: Kaori Asoh
The main character; a 4th grade student at White Dove Academy. She receives a present on her 10th birthday that transforms her into Nurse Angel, a heroine with the power to fight an invasion by the evil organization Dark Joker. She's plucky, but is she up to the task?
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* ActionGirl: If Ririka can't save the day, no one can.
* AllLovingHero: She's the linchpin of her group, she's kind-hearted and compassionate, and she wants everyone to be happy. [[BewareTheNiceOnes But you'll regret it if you make her mad.]]
* BettyAndVeronica: Ririka is Betty in the triangle between Ririka and Mimina for Seiya's attention.
* BewareTheNiceOnes: She's so cheery and friendly, and as the closing theme assures us, everyone loves her. But Ririka's temper is nothing to scoff at. She hates it when people are mistreated, and her powers get stronger when she's angry.
* BigDamnHeroes: Ririka appears out nowhere, stopping evil in its tracks and saving her friends from certain doom! [[ButForMeItWasTuesday This sort of thing happens at least once every couple of weeks.]]
* CallingYourAttacks: Inevitable, right? "[[FinishingMove Angel Aid Bomb Beeeeeam!]]"
* EmeraldPower: Nurse Angel's power source is the '''Green''' Vaccine, so her attacks often take this color...with the alternative being pink. She does fire off a lot of pink energy too.
* EmotionalPowers: Ririka's attacks are more dramatic when she's angry or has tapped into a new well of heroic resolve.
* FrillsOfJustice: The Nurse Angel costume features a poofy skirt and similar sleeves.
* HairDecorations: Typically ties her hair into a ponytail using a red ribbon.
* IJustWantToBeNormal: Ririka [[JumpedAtTheCall jumps at the call]] at first, unaware of [[NotAGame how high the stakes are]]. Before long, Ririka is involved in some very trying and tragic events and NothingIsTheSameAnymore. Being a magical girl isn't all it's cracked up to be.
* MessianicArchetype: [[spoiler:A [[ChosenOne Chosen Girl]] faces trials that she does not deserve, including betrayal by friends. She has to [[PassionPlay voluntarily give up her own life]] in order to save the world. And then, after her HeroicSacrifice, she comes back to life.]]
* NaiveEverygirl: In the beginning. Hardship develops her into a MessianicArchetype.
* ObliviousToLove: All of Ririka's friends know that Seiya wants to be more than friends, but Ririka [[PlayedForLaughs never catches on to their hints]].
* PluckyGirl: She barely even bats an eye at weird monsters. Personal loss does get her down, but she always gets back up.
* PowerMakesYourHairGrow: Her civilian form hair is about shoulder length. As Nurse Angel, it falls halfway down her back.
* RingOfPower: Nurse Angel's Angel Ring originates some of her attacks. [[CallingYourAttacks Angel Ring Force Shield]], for instance.
* ScarfOfAsskicking: Nurse Angel sports one, seemingly invoking wings and KamenRider at the same time.
* ShakingHerHairLoose: Her transformation shows her hair ribbon coming undone to let her hair down.
* SpellMyNameWithAnS: Ririka/Lyrica/Lillica
* ThisIsUnforgivable: Frequently proceeds the transformation sequence. Or the final attack sequence.
* TookALevelInBadass: It is not discussed, but Ririka's attacks get ''bigger'' [[spoiler:after Kanou-senpai dies]].
** In the novelization, Dewey actually reflects on how she starts to outclass him at that point in the story.
* [[HolyHandGrenade Wholesomeness Hand Grenade]]: Her attacks are devastating to Dark Joker, but good people seem to withstand them pretty well.

!!'''Seiya Uzaki'''
!!! Voiced by: AkiraIshida
Ririka's next-door neighbor, classmate, and childhood friend. He is a joker and something of an attention seeker, but he is very sincere in his affection for Ririka. He would do anything to help her, no matter how rash.
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* AfraidOfBlood: Despite his aspirations to become a doctor, Seiya all but passes out at the sight of a skinned knee early in the show. As the show progresses he learns not to let it slow him down.
* BewareTheSillyOnes: His LeeroyJenkins antics are funny, but [[LetsGetDangerous give him the power to back up his fearlessness]] and awesomeness will ensue.
* ClassClown: Of course he makes jokes when the teacher asks questions. He tends to end up in the role of ButtMonkey in every classroom scene.
* DeadpanSnarker: Has MetaGuy tendencies, and as the show progresses he becomes a font of {{one liner}}s.
* DeclarationOfProtection: "I'll protect you, Ririka" is like a mantra for him.
* DefenceMechanismSuperpower: On several occasions Seiya spontaneously uses an AreaOfEffect energy attack when he is angry or running out of options. It's effective, but it leaves him completely drained.
* DistressedDude: Gets tied up fairly regularly.
* DoggedNiceGuy: Wants to be more than JustFriends with Ririka, but CannotSpitItOut.
* DorkKnight: A hyperactive, clever, absolutely fearless goofball. Villains actually refer to him as a knight.
* EmotionalPowers: His powers may function entirely on this principle.
* HowDoIShotWeb: Once Seiya joins the team it takes him a while to get the hang of his new powers. This generates some welcome comic relief [[spoiler:when Kanou weakens and dies]].
* HotBlooded: It's almost like his powers are triggered by yelling. It may just be a coincidence, but he does yell a lot when he uses them.
* NoPronunciationGuide: Seiya mispronounces Herb's name as "Heebu" (the actual Japanese rendition of the word is "haabu".) Seiya gets corrected by his dad, but it doesn't stick.
* NotWearingTights: Once he becomes an EmpoweredBadassNormal, he throws around energy projectiles and gets into aerial battles wearing jeans and a hoodie.
* PluckyComicRelief: His role in the early parts of the story. He has nigh impenetrable PlotArmor.
* ProperlyParanoid: In general, Seiya's pretty inclined to suspicion.
** He's suspicious of Kanou-senpai from the beginning, but Ririka ignores him. This leads to a CryingWolf situation later on, [[spoiler:when Kanou is suspicious ''and'' malicious]].
** When Seiya gets let in on the secret, he almost seems to relish the possibility of danger around every corner.
* RecklessSidekick: Seiya - [[HotBlooded perhaps the awesomest 10 year old boy ever]] - does not know the meaning of "in over your head" and has a penchant for attacking large monsters armed with [[ImprovisedWeapon conveniently placed mops and brooms]].
* TookALevelInBadass: Hallelujah! After much mucking around, Seiya joins the team! And gets super-powers!
* WrongGenreSavvy: Sorry to break it to you Seiya, but you're not in a sentai show and you aren't going to get to transform.

!!'''Nozomu Kanou - Kanon'''
!!! Voiced by: Hidehiro Kikuchi
An alien from the planet Queen Earth, in disguise as a transfer student at White Dove Academy. He gives Ririka the Angel Cap as a birthday present, and mentors her in hopes that as Nurse Angel, she will stop Dark Joker and free his home world.
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* [[spoiler:BrainwashedAndCrazy: The reason behind his FaceHeelTurn. Eerie in that he's a sincerely evil SmugSnake while brainwashed -- he's simply miming his original personality. It only waivers when he's severely weakened.]]
* BrokenTears: [[spoiler:He's typically very steady and reserved, but the angst is way too much for him in the final episode. He barely manages to compose himself at any point.]]
* CluelessChickMagnet: His single-mindedness makes him a functional ChasteHero. He has a lot of grade school girls smitten with him, but he only has eyes for Princess Helena.
* EvilCostumeSwitch: His Queen Earth duds go from primarily white to primarily navy.
* ForeignExchangeStudent: When he comes to White Dove Academy, he poses as a exchange student from a sister campus in England.
* GameBreakingInjury: [[spoiler:He is blinded in a fight and dies shortly afterward.]]
* ImplacableMan: [[spoiler:While possessed, he barely speaks and shrugs off everything the heroes throw at him.]]
* LadyAndKnight: He has this dynamic with Princess Helena.
* TheObiWan: He guides Ririka in her role as heroine -- she never becomes as self-sufficient as he wanted, but then again she operates on the PowerOfFriendship.
** [[spoiler:He's subject to MentorOccupationalHazard, and gets his ObiWanMoment too. After a traumatic and painful final decline, he DisappearsIntoLight with a [[GoOutWithASmile smile on his face]]. He keeps popping up in the story, though.]]
* PrincelyYoungMan: He gets chauffeured to school, he lives in a mansion, he has a loyal butler. Everyone treats him like nobility.
* ScarfOfAsskicking: Kanon's got one that verges on BadassCape.
* SchoolIdol: Excels in academics and athletics equally, according to his transcript. Everyone at school seems to be in awe of him.
* TheStoic: He's polite, but [[AloofBigBrother distant]]. He rarely smiles, and is unflinching in the face of hardship and injury.
* TransferStudentUniforms: Wears a purple jacket to school even though the White Dove boys uniform has a blue one instead.
* WoundedGazelleGambit: [[spoiler:Uses this ploy all the time while brainwashed.]]

!!'''Anna Kazami''' and '''Karin Mizuhara'''
!!!Voiced by Azusa Nakao and Kaoru Suzuki
Ririka's best friends and classmates. They're very supportive, but they aren't in on her secret.
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* FleetingPassionateHobbies: Karin has a habit of taking her friends to eateries staffed by boys she fancies, and she's never shown taking them to the same place twice.
* ProperLady: Anna is very mild-mannered and speaks [[{{Keigo}} very formally]] regardless of the situation.
* ShipperOnDeck: Both Anna and Karin ship Seiya and Ririka. They lament that Ririka is ObliviousToLove, and encourage Seiya to [[CannotSpitItOut spit it out]].

!!'''Miyuki Kuwano'''
!!!Voiced by Emiko Matsuoka
A snobbish and elitist White Dove Academy student who doesn't think that Ririka and Seiya meet the school's standards. She started a fanclub for Kanou and is constantly frustrated that he pays more attention to Ririka than to her.
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* AlphaBitch: Resident {{Ojou}} Miyuki, head of Kanou-senpai's InstantFanClub, the core members of which form her GirlPosse. Largely ineffectual and often PlayedForLaughs, she eventually [[spoiler: reveals a sympathetic side, gives up on Kanou, and makes peace with Ririka]].
* [[AnimalsHateHim Animals Hate Her]]: She is afraid of dogs. Other characters, including the ''dog himself'', seem to be aware of this fact and exploit it.
* ForeheadOfDoom: Scriptwriters and animators alike have a lot of fun at the expense of Miyuki's fivehead.
* LonelyRichKid: She envies Ririka's home life. [[WhenYouComingHomeDad Her dad is too busy with his job to spend time with her.]]
* {{Malaproper}}: "My love for Kanou-sama is deeper than the Eiffel Tower and higher than the Mediterranean Sea!"
* StatusCellPhone: A 10-year-old in the 90s with a cell phone? She must live in the lap of luxury!
* UnwittingPawn: Gets wrapped up in Dark Joker schemes more than once. Typically involves some sort of [[NotHimself mind control]] or [[MoreThanMindControl suggestion]].

!!'''Princess Helena'''
!!! Voiced by: Creator/YuriAmano
The (apparently sovereign) princess of Queen Earth; she is suffering from an illness caused by the invasion of her world by Dark Joker, but she struggles to maintain her realm nonetheless. She sent Kanon to Earth to find Nurse Angel.
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* DistressCall: "''Ririka... Ririka... Ririka... S.O.S.!''"
* EverythingsBetterWithPrincesses: The elder and more powerful of the show's two princesses.
* TheHighQueen: Because in this case, PrincessesRule. She's a poised, beautiful ReasonableAuthorityFigure.
* {{Human Alien|s}}: A native of Queen Earth.
* IllGirl: She's sick because of the Black Vaccine. Based on reports from Kanou-senpai and Mimina, her illness is getting progressively worse. [[DamselInDistress Only Ririka can reverse the effects of the Black Vaccine and save her.]]
* MysticalWaif: Frail, but obviously powerful.
* SpiritAdvisor: She coaches Ririka in the use of her Nurse Angel abilities via voice-over, but only appears in flashbacks and dream sequences.
* WomanInWhite: Wears a ([[CherryBlossomGirl pink-tinted]]) white dress as a sign of IncorruptiblePurePureness, and she is important -- she launched the plot by sending Kanou-senpai to find Ririka.
* [[YouGottaHaveBlueHair You Gotta Have Aqua Hair]]

!!'''Princess Mimina'''
!!! Voiced by: Noriko Namiki
Princess Helena's younger sister; she travels to Earth to help Nurse Angel save her home world. She idolizes Nurse Angel but she treats Ririka with disdain, and she has a crush on Seiya.
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* BettyAndVeronica: Veronica in the triangle between Ririka and Mimina for Seiya's attention. It's pretty one-sided on Mimina's part.
* ConvenientReplacementCharacter: The show introduces her the episode after Kanou-senpai [[PutOnABus gets back on the bus]].
* EverythingsBetterWithPrincesses: She fits the princess model visually with the OjouRinglets and frilly dresses, but is hardly the PrincessClassic in personality.
* ForeignExchangeStudent: She decides to attend White Dove Academy and poses as Kanou-senpai's younger sister. Like him, she develops an InstantFanClub mostly of boys awed by her cuteness.
* HeroWorshipper: Mimina to Nurse Angel. Toward ''Ririka'', she's condescending.
* {{Human Alien|s}}: Comes from Queen Earth. She can read people's thoughts through physical contact, but it never really comes in handy.
* IrritationIsTheSincerestFormOfFlattery: [[CostumeCopycat Made herself a Nurse Angel costume]] complete with baton, and tries to invoke Nurse Angel named attacks. It doesn't work, of course.
* {{Kawaiiko}}: The squeaky voice, [[HairDecorations hair ribbons]] and frilly dresses are calculated to overwhelm people with how cute she is. And it works.
* LoveAtFirstSight: She takes a shine to Seiya right away and tries to win him over. It doesn't work.
* RoyalBrat: Mimina. She aims for PluckyGirl, but she's still bossy, insensitive, and [[TheLoad more likely to create conflict than resolve it]].
* YouGottaHaveBlueHair

!!'''Buros'''
!!! Voiced by: Creator/RyoHorikawa
Leader of Dark Joker; he considers goodness to be weakness and has little regard for his underlings. Has a looming, imposing appearance combined with effeminate mannerisms.
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* BadBoss: His subordinates are really, really scared of disappointing him, and with good reason. When Buros is angry at one of his lackeys, they go crazy and then they die.
* BigBad: Leader of the evil organization that aims to end life on earth.
* DemonicPossession: When he's near-death courtesy of Ririka, he performs a [[PeoplePuppet body hijack]] on Kanou-senpai.
* {{Human Alien|s}}: A member of Dark Joker; by far the tallest member of the cast demonstrates an assortment of EvilSorceror powers.
* LivingShadow: Produces an [[BlobMonster amorphous, black doppelganger]] from his shadow in episode 24 and uses it to hunt Dewey. When Ririka destroys it, Buros gets [[GoodScarsEvilScars a nasty scar]] across his face from the magical blowback.
* MadeOfEvil: Buros ''is'' the Black Vaccine; the stuff kills plants and animals, causes fatal illness in humans, and it can [[TheCorruption turn people evil]] in some cases. His [[EeriePaleSkinnedBrunette eerie, pale appearance]] may be a reflection of his nature.
* ManipulativeBastard: BigBad Buros gets tired of his minions' failures and [[MakeAnExampleOfThem makes an example]] of the less successful Keto, telling him, "YouHaveOutlivedYourUsefulness"...''and actually gets a bit more productivity out of the poor sap'' via his subsequent FreakOut.
** The sole survivor MookLieutenant after this event is terrified when he has to report failure to Buros. But Buros [[NotHimself pulls a 180]] and responds in a [[AFatherToHisMen supportive and consoling manner]]...[[spoiler:with the intent of encouraging the desperate, grateful minion to work himself to death trying to get back into Buros' good graces.]]
* MyDeathIsJustTheBeginning: [[spoiler: Buros turns out to be a DiskOneFinalBoss, and the evil {{Phlebotinum}} itself is the BiggerBad.]] As promised, [[FromBadToWorse things get worse]].
* OmnicidalManiac: Buros. What does he want? Silence in the universe.
* RageBreakingPoint: The tide turns against Buros around episode 24. He loses his base and his stock of Black Vaccine...and then he gets disfigured. LaughingMad ensues.
* RevengeBeforeReason: Buros is ''way'' pissed at Dewey (understandable, since Dewey got him to accidentally destroy his own base and his power source at the same time) and pursues him single-mindedly. Eventually Buros catches Dewey, but he takes some time out for EvilGloating, giving Ririka an opportunity to [[BigDamnHeroes come to the rescue]]. This is not the end of the vendetta -- it just broadens to include Ririka as well.
* SissyVillain: He's a towering EvilSorcerer type, but he has some effeminate traits -- a high-pitched voice complete with NoblewomansLaugh, a [[SesquipedalianLoquaciousness habit of giving flowery speeches]], [[WickedCultured hosts a murderous]] MasqueradeBall...and did he just say "IfICantHaveYou" to Dewey?

!!'''Dewey'''
!!! Voiced by: YurikoFuchizaki
One of the Dark Joker sub-commanders; a swordsman with a blithe attitude who treats the attack on Earth like a game. Over time, he comes to view Nurse Angel as a worthy opponent. [[spoiler:When the leader of Dark Joker turns on him, he joins up with Ririka.]]
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* ActionFashionista: Once he switches over to Earth clothes, he develops an interest in fashion. His outfits run the gamut from sweatshirt and jeans to [[SharpDressedMan three-piece suits]] and {{classy cravat}}s.
* BadassCape: White cape with a red lining. He gets a nice CapeSwish or two.
* BigDamnHeroes: He gets some gems, involving such feats as the BareHandedBladeBlock and the [[DynamicEntry skylight crash]].
* CanonImmigrant: Dewey, the EnsembleDarkhorse of the TV series, got imported into the manga.
* DeadpanSnarker: [[InHarmsWay He thinks nothing of danger]] and quips, especially ones at the expense of more cautious characters, come easily to him. When he does start worrying about danger he switches to "WhatCouldPossiblyGoWrong"-type snark.
* FriendlyEnemy: He grins and waves when the heroes show up; "Hi, Nurse Angel!" is a minor catchphrase of his. His default state is cheery, but he's ruthless. He [[SpiritedCompetitor loves testing his mettle]] and lives to [[GlorySeeker prove himself]].
* {{Fauxreigner}}: Ririka and Seiya claim Dewey is a non-specific foreigner to excuse his odd attire when Ririka's parents let Dewey drop in for dinner. [[ExactWords It's not ''not'' true...]]
* FeelNoPain: Dewey gets a power-up, that, (unbeknownst to him,) prevents him from feeling pain. The results are unpleasant.
* FlorenceNightingaleEffect: Dewey falls prey to this [[spoiler:after Ririka heals fatal injuries he's suffering from.]]
* [[spoiler:HeelFaceTurn: FauxAffablyEvil Dewey [[EtTuBrute gets set up by the Big Bad]], but [[RedemptionEarnsLife Nurse Angel takes pity on him]]. After [[TheAtoner going to great lengths to repay her]], he becomes the team's SixthRanger.]]
* {{Human Alien|s}}: His origin is left vague, but he's not from Earth.
* [[spoiler:HumanityIsInfectious: He develops empathy thanks to the heroes. Mostly. It's maybe 25% CuriosityCausesConversion, 75% having his [[TheCorruption corruption]] removed.]]
* [[IHaveYourWife I Have Your Brother]]: He kidnaps Ririka's little brother in one of many ploys for drawing Ririka into fights. He lets the kid go as soon as she shows up, though not in the safest of manners.
* IOweYouMyLife: He does effectively say this, but not to the person to whom he owes the debt.
* JerkassFacade: Once he gets healed and starts to care he tries to put on an indifferent front, but he has a HiddenHeartOfGold.
* LoafingInFullCostume: Does this in the first arc -- He can be seen chillin' out, [[CrazyPeoplePlayChess playing chess solo]] while taking verbal pot shots at Keto.
* NobleDemon: He's not 100% honorable, but he does prefer to fight fair.
* NotAfraidOfYouAnymore: [[spoiler:Even after his HeelFaceTurn, it takes him a little while to shake his fear and servility towards Buros. But once he [[FaceYourFears confronts his fear]], [[{{Badass}} it's]] ''[[{{Badass}} on]]''.]]
* [[spoiler:RedemptionDemotion: Inverted -- he seems a whole lot stronger when he joins the good guys.]]
* ScarfOfAsskicking: He gets an outfit that has one.
* [[ShouldntWeBeInSchoolRightNow Shouldn't You Be In School Right Now?]]: Based on his appearance, he is about the same age as Kanon. But unlike Kanon, he doesn't go to school.
* WhiteHairBlackHeart: Look at that blue-white hair, that slight build...he suits this trope to a tee.

!!'''Keto'''
!!! Voiced by: KoujiIshii
One of the Dark Joker sub-commanders; a schemer who uses spies, traps, and deception to get the drop on opponents. He is eager to prove his superiority over his colleague Dewey.
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* BondCreature: Has a black cat that spies for him. It's obviously supernatural -- in one scene it apparently whispers a report in his ear.
* CorneredRattlesnake: The BigBad labels Keto as a [[TheLoad weak link]], and Keto ''[[FreakOut snaps]]''. [[spoiler:He [[NoKillLikeOverkill flat-out murders]] Kanou-senpai's butler, and finally succeeds in bumping off Kanou-senpai as well.]]
* DevilInDisguise: Employs a couple of pretty convincing disguises. Notably, "Mr. Edward" looks like a [[BeautyEqualsGoodness pretty upstanding guy]]...so long as there aren't any {{Evil Detecting Dog}}s nearby.
* JapaneseRanguage: You can hear every kana in his English dialog while in disguise as "Mr. Edward." A CoverIdentityAnomaly for Anglophones; why does the "foreigner" speak with such a thick accent?
* TrapMaster: His preferred type of plans involve spying on the heroes, feeding them false leads, and setting snares for them when they follow through.