[[caption-width-right:236:The princesses of Valhalla planet.]]

->''"It's no guess. It's for reals."''

''UFO Princess Valkyrie'' is an {{anime}} about magical princesses from outer space. One of said princesses, namely Valkyrie, lands her spacecraft on the Tokino Bath House, killing its current manager, the teenage Kazuto Tokino. So in order to save his life, Valkyrie gives him half her soul. Thus the obviously adult Valkyrie is transformed into a young girl who looks and acts like a child.

Valkyrie and her fellow princesses have magical powers. So whenever Kazuto and his crew encounter any problems, she is able to transform and protect him.

Aside from causing Kazuto and his sister Rika financial problems by damaging the bath house, Valkyrie has caused problems for her sister Hydra. Valkyrie ran away because she was supposed to marry a man she didn't love. Hydra, as the second oldest unmarried princess, is going to have to marry him if Valkyrie doesn't, so she goes to Earth and wreaks havoc trying to find Valkyrie. Eventually, she is stopped by Kazuto's shrine priestess neighbor and childhood friend, Akina Nanamura, who turns her into a little girl (like Valkyrie, but with her adult mind) so she is "easier to control". Also, Hydra crashed into Akina's shrine, and Akina keeps her around so she can "work off the damage".

Akina is also a childhood friend of Kazuto and has a secret crush on him, often putting her at odds with Valkyrie. So she and Hydra are sometimes partners in crime to cause problems for Kazuto and crew.

Later, Sanada, a catgirl maid of the royal family of Valhalla, the planet whence comes Valkyrie and Hydra, returns looking for Valkyrie. She is not shocked by Valkyrie's new appearance; in fact, she finds the new Valkyrie intolerably cute. Sanada takes her mission to protect Valkyrie to extreme lengths, including, for example, turning a bunch of ordinary girls who talk even indifferently to Kazuto, into mindless catgirl servants for the Tokino Bath House.

More crazy characters come along, including prima donna/diva/ditz Laine, CloudCuckooLander Chorus, and the intolerably ruthless "older princesses".

The show is light (mostly) in nature and is kind of a slice of life show. There are four seasons, of varying length. The second season is more serious and dark than the others, mainly because of Valkyrie Ghost, a mysterious figure who appears to Kazuto.

This is a fun show to watch for its [[RuleOfFunny comedic elements]]. Additionally, it contains many instances of [[{{Fanservice}} fanservice]]. (After all, it takes place in a [[FuroScene bath house]].)

Welcome to the crazy world of ''UFO Princess Valkyrie'', where alien (though humanoid) princesses run wild and cause mass chaos among Earthlings.

Theme songs and insert songs are by {{Melocure}}.


[[folder: This show provides examples of: ]]

* AbsoluteCleavage: Nesty.
* ActionGirl: Hydra.
* ACupAngst: Akina, while she isn't exactly flat, but she really feel intimidated by everyone else's "perfect" size busts. Mentioning them is also her BerserkButton.
* ADayInTheLimelight: All the non-main cast princesses got one eventually. Rika also gets one in season one.
* AmazonBrigade: The Valhalla princesses.
* AmbiguouslyBrown: Hydra.
* BattleButler: Miss Sanada.
* BeachEpisode
* BigEater: Laine. When her two younger selves live at the bathhouse, the food bill triples.
* {{Bishonen}}: Kazuto...
* BizarreAlienBiology
* {{Brainwashed}}/HappinessInSlavery: {{Catgirl}} servants. Pharm's {{Meganekko}} servants. Seriously, there aren't interplanetary weapons treaties against ray guns that transform ordinary women into slavishly loyal servants to a foreign power?
* BlindWithoutEm: Laine (contact lenses version), Pharm.
* BrainyBrunette: Rika.
* BrattyTeenageDaughter: Laine.
* BreakingTheFourthWall: Chorus seems to like doing this
* BreastExpansion: A scene in the second season where after Valkyrie makes a cookie bigger with magic. Just after that Hydra makes a joke about making Akina's breasts bigger. [[http://www.youtube.com/watch?v=Rs7vDClvmVc Guess what happens next]]. Good thing [[BuxomIsBetter Akina wanted bigger breasts.]]
* BrokenBird: Valkyrie Ghost is a AnthropomorphicPersonification of this trope.
* TheCaptain: Nesty.
* CatGirl: Sanada, and her "servants".
* ChasteHero: Kazuto.
* CheerfulChild: Valkyrie.
* TheChewToy: Poor Spot, always the victim of Little Val.
* ChickMagnet: Kazuto.
* ChorusGirls: Abound. And not just the princesses.
* CleaningUpRomanticLooseEnds: Averted. See FirstGirlWins below (if you MUST know.)
* CloudCuckooLander: Chorus. She thinks she's a robot and has also thought she is an alien. (Well, technically she's right about the alien part.)
* ColonelBadass: Marduke!
* ColorCodedForYourConvenience: Valkyrie Ghost, as opposed to Valkyrie and Hydra.
* CuteLittleFangs: Sanada, Hydra, and Laine, also Pharm though you rarely see hers
* DarkActionGirl: Valkyrie Ghost.
* DeadpanSnarker: Rika, Hydra.
* DescentIntoDarknessSong: 'Princess of December'. Starts out as a romantic song of eternal love and devotion, sung by the titular Valkyrie, only for it to be hijacked halfway through by her ShadowArchetype, Valkyrie Ghost, who turns it into a heart-wrenching song of loneliness and despair. It's one of the first hints that the Dark Valkyrie is actually a tragic figure, rather than the out-and-out villain she first appear to be. You can hear it [[http://www.youtube.com/watch?v=m-1lbEFjRXU here]].
* TheDitz: Laine.
* DreadfulMusician: Akina, at least to Hydra
* DrivesLikeCrazy: Valkyrie, Hydra, and Pharm. But specifically, Laine. Who fortunately drives her motorcycle better than her saucer.
* EmotionlessGirl: Chorus.
* EveryoneLovesBlondes: Kazuto for Valkyrie.
* EvilTwin: Valkyrie Ghost
* {{Expy}}: Look at Princess Inarba and just try to tell me she doesn't physically remind you of [[Manga/AhMyGoddess Belldandy]].
* FakeUltimateHero: Parodied by Sanada's "Nekomimizukin" in the 3rd season.
* FallenHero: [[spoiler: Valkyrie Ghost]].
* {{Fanservice}}
* FemmeFatale: Valkyrie Ghost.
** Also Hydra at first.
* FirstGirlWins: Subverted somewhat. [[spoiler: Though she has apparently "lost" to Valkyrie, Akina, in the last episode, enters a wish letter that will be granted by magical properties of Valhalla. Three people make wishes, but her letter is the only one not destroyed by little Valkyrie]].
* FountainOfYouth: In the form of bath beads.
* FriendshipMoment: Laine [[spoiler: and Keena/]] and Chorus. Hydra and Akina, also.
* FuroScene
* FusionDance: Akina and Hydra's "Akidra".
* GlassesGirl: Pharm and Rika.
* HaremAnime: Kazuto is surrounded by women. Whether they desire him or not is somewhat irrelevant (but quite a few do).
* HollywoodCyborg: Chorus [[spoiler: might be one.]]
* HotForStudent: Pharm.
* HotLibrarian: Pharm.
* HotSpringsEpisode
* HotTeacher: Pharm.
* IdiotHair: Rika, who definitely does not reflect the implication.
* ImprobablyFemaleCast
* IronicHell: Essentially, where Inarba sends a character if he/she has been bad. But only for a short time.
* KickTheDog: Literally, seen with Little Val and Spot. Justified and averted because ChildrenAreInnocent. [[spoiler:Also, he's actually not a dog.]]
* KnightOfCerebus: Valkyrie Ghost, contrasting with the normally lighthearted nature of the series, stops all the comedy whenever she shows up, and her true nature adds to it.
* {{Leitmotif}}: Everybody who has a transformation sequence. [[MyFriendsAndZoidberg Also Chorus]].
* LimitedWardrobe
* LittleMissSnarker: Little Hydra.
* {{Lolicon}}: Akina accuses Kazuto of being this when she first sees him with Little Val, but the whole thing is...well, complicated.
* LoveTriangle: Kazuto, Valkyrie, Akina. Even Laine made this into a Love Square at first.
* MagicWand: The titular character's WeaponOfChoice.
* MagicalGirl: Valkyrie, Hydra, Mehm...pretty much all the princesses.
* MagicalGirlfriend: Valkyrie.
* MagicPants: Valkyrie and Hydra. Their outfits seemingly able to accommodate the change in size during transformation. Also, little Valkyrie does not wear pants (just a skirt) while the adult one does.
* {{Meganekko}}: Pharm. Also something she is fond of...
* MercurysWings: The titular princesses all have these type of wings.
* {{Miko}}: Akina.
* MonogenderMonsters
* MoralDissonance: Sanada, when one [[FridgeLogic opens the fridge]]...
* MsFanservice: Laine and Miss Sanada.
* MusicalEpisode
* NiceGuy: Kazuto.
* TheNicknamer: Rika, who calls Little Valkyrie "Valkyu".
** Also Little Valkyrie who calls people by cute variations of their names, like "Hydie" for Hydra and "Chorie" for Chorus.
* NonActionGuy: Kazuto...oh boy.
* NoSenseOfDistance: Comet Sleipnir, just passing by Earth in the last episode, will visit Valhalla in 900 years since it's on the other side of the galaxy.
* NotHimself: Used ironically, as the past versions of Laine see a [[NoDoubtTheYearsHaveChangedMe marked difference]] in the character of their future self. While in the past Laine also noticed that Valkyrie as a child didn't act like little Valkyrie at all.
* OddFriendship: Akina and Hydra.
* OfficialCouple: [[spoiler: Kazuto and Valkyrie. Surprise.]]
* OneeSama: Valkyrie to Hydra. Though this often seems cast aside as a joke or a phase Hydra went through, even though Hydra doesn't seem to prefer the male gender, though, besides Kazuto, [[SituationalSexuality there]] [[ImprobablyFemaleCast isn't]] [[TheOneGuy much choice]]. Also, Valkyrie to Laine, in a flashback episode.
* TheOneGuy: Really, other than the little pet guys, Kazuto is the only major, or even recurring, male in the show.
* OnlySaneMan: Kazuto and Spot usually share this role.
* OnlySaneWoman: Rika.
* PantyShot
* PowerOfFriendship: Parodied, because Akina and Hydra have to actually become mad at each other in order to activate their FusionDance, and separate when they get along again.
* PrettyInMink: Some outfits have white fur trim.
* ReligionIsMagic: Priestess Akina.
* "Music/RideOfTheValkyries": A rather [[http://www.youtube.com/watch?v=NnEIXJGvjEc unique version]] of it is often used during the series.
* RomanticComedy
* RousseauWasRight: Arguably, [[spoiler: the tragedy of Valkyrie Ghost]].
* {{Shotacon}}: Akina, when she saw the de-aged Kazuto as a result of the aforementioned [[FountainOfYouth Fountain of Youth]]
* ShrinesAndTemples: The Nanamura shrine.
* SmallGirlBigGun: Sanada and the Catgirl ray gun.
* TheSnarkKnight: Rika.
* SpacePirates
* StalkerWithACrush: Laine.
* StarCrossedLovers
* StraightMan: Rika, to everyone else, and is probably the borderline OnlySaneMan.
* TalkativeLoon: Chorus.
* TalkingAnimal: Mar, Mur, Spot.
* TeamPet: Spot.
* ThirdPersonPerson: Little Valkyrie.
* TimeAndRelativeDimensionsInSpace: The whole Laine thing. Pretty much the third example of the trope.
* TimeTravel: Laine, Laine, and Laine.
* TokenMiniMoe: Valkyrie and Hydra fit this trope unless they do their transformations.
* TransformationSequence: Valkyrie, Hydra, Akina + Hydra, Valkyrie Ghost, Laine, even Sanada!
* TroubledButCute: A lot of the characters fall under this, actually.
* UnluckyChildhoodFriend: Akina.
* UnwantedHarem
* VoluntaryShapeshifting: Laine's ability
** MorphicResonance: While she is a capable VoiceChangeling too, the two parts of hers she can't possibly modify are her breasts (she is somewhat well endowed) and her antennae thing which is also her 'weak point' since pulling it means she will revert back. These are the only thing that can give away her disguise, especially when she try to put on a disguise as a male character.
* WaifProphet: Chorus. Even though [[TalkativeLoon most of what she says is nonsense]], she is somehow able to predict the [[spoiler: 12 Moons of Valhalla]] [[StoryArc arc]].
* WholeEpisodeFlashback
* WorldOfBuxom: Out of the eight princesses, Chorus is the only one who isn't extremely ample, and that's because despite her height, she's actually one of the youngest if not ''the'' youngest of the princesses.
* YouGottaHaveBlueHair: Hydra and Chorus.