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[[quoteright:240:http://static.tvtropes.org/pmwiki/pub/images/Sekirei_Pure_Engagement_2599.jpg]]
[[caption-width-right:240:Boobies for the win!]]

Minato Sahashi is an [[OrdinaryHighSchoolStudent Ordinary College Student]], even though [[{{Ronin}} he's failed his entrance exams twice]]. As he's walking down the street, he suddenly finds a MagicalGirlfriend falling from the sky and [[CrashIntoHello crashing into him]]. She is Musubi, one of [[OneHundredAndEight 108]] beings known as Sekirei, about to be engaged in a [[ThereCanBeOnlyOne Battle Royale]] across Tokyo, headed by the mysterious MBI organization. With a kiss, Minato "wings" Musubi and becomes her Ashikabi, or master, for the battle royale. The Sekirei Plan begins.

Based on the manga by Sakurako Gokurakuin (yes, the artist is a woman), it was turned into a TwelveEpisodeAnime in summer 2008 by Seven Arcs. A second season, ''Sekirei ~Pure Engagement~'', aired in summer 2010.

The animé was licensed by {{Funimation}}. [[http://www.youtube.com/show/sekirei Find it here.]]

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!!Tropes in ''Sekirei'' include:

* AbductionIsLove: Several Ashikabi are known to [[DoesThisRemindYouOfAnything forcefully]] wing Sekirei against their will. Mitsuha describes the process as "taming" them, suggesting once winged, a Sekirei will develop feelings whether the bond was consensual or not.
* AccidentalMarriage: You may say this when Minato winged Tsukiumi and Kazehana as both of them said they are his wives. Musubi and Kusano also claim to be his wife, though Musubi didn't seem to know what this actually ''means''.
* AccidentalPervert: Minato, though usually the result of the action of one or more of his haremettes.
* AchillesHeel: All winged Sekirei have one, in the form of their Sekirei Crest. If exposed, an opponent need only touch it and recite their [[ByThePowerOfGreySkull Norito]] for an OneHitKill.
* ActionSurvivor: Minato quickly becomes one, later upgrading to borderline BadassNormal status by the end of Season 2.
* ACupAngst: Benitsubasa does not seem to like being flat-chested at all, especially when Haihane picks on her about it.
* AffablyEvil: Minaka. Dude might be the power mad head of MBI, but dude's got style.
** [[spoiler:He's willing to use MBI's resources to save the fatally ill Chiho. He may have some [[XanatosGambit ulterior motive regardless of what happens]], but he's not all bad.]]
** He also [[spoiler: appears to have genuinely cared about Takehito and has thus far honored his request to not involve Miya in the Sekirei Plan]].
** Also Karasuba.
** Possibly Natsuo, [[spoiler:who agrees to be Karasuba's Ashikabi in order to help her destroy humanity]] though he's more of a ''StoppedCaring'' type.
* TheAgeless: Sekirei appear to not age in the same manner as humans. It is shown that the five eldest Sekirei (#01 - #05) are fully grown adults while many of the others are still infants. [[spoiler: A brief flashback shows Miya saying her farewells to an infant Tsukiumi, before she retired from the Discipline Squad.]] Likewise, Karasuba and Yume were fully grown adults when Musubi met them as a small child.
* AlmostKiss: Played with during the 3rd Match. [[StraightGay Natsuo]] repeatedly asks his Sekirei if they want to use their Norito, causing them to get flustered and excited. [[ButtMonkey Benitsubasa]] makes a ''huge'' deal about it and bickers with Haihane over who gets to go first. She wins the argument, but just as she leans in to get her kiss....Natsuo's phone rings.
* AloofAlly: [[spoiler: Uzume.]]
* AmusingInjuries: Homura setting Matsu's hair on fire, for one...
** CranialEruption: From Musubi's failed BareHandedBladeBlock.
* AnimalMotif: Musubi with Bears is an obvious one, but a more subtle one is Tsukiumi; a number of her attacks are named after and carry the appearance of snakes or serpents or her hair went wiggling like a snake everytime she is angry.
** The Sekirei as a whole have a motif involving birds. This makes sense since [[ExactlyWhatItSaysOnTheTin the Sekirei is a type of bird]], also known as the Wagtail. Shinto creation myths credit these birds with teaching the gods Izanagi and Izanami to love.
* AntiMagic: [[spoiler: Seo can surpress a Sekirei's ability as long as he's touching them. Or, more accurately, groping them.]]
* AntiVillain: [[spoiler: Uzume - taking out Sekirei like a hitman and not even following the customs of honoring one's opponent, but only because she's being blackmailed with her Ashikabi's life on the line.]]
** Mikogami is beginning to [[CharacterDevelopment slide]] into this as well, along with his two primary Sekirei ([[MyMasterRightOrWrong Akitsu]] and [[NobleTopEnforcer Mutsu]]).
* ApronMatron: Miya Asama, [[TheKanrinin the landlady]] of Izumo, is also crazy tough in combat, and thus regularly trains with Musubi.
* ArtEvolution: To be expected, after 140 chapters and counting....
* AsYouKnow: Minato accidentally invokes this on Matsu in season two when she mentions there were now rumours about a Sekirei and Ashikabi escaping the plan.
--> '''Minato:''' But they're not rumours! They really did escape!
--> '''Matsu:''' I know. I was there.
* AuthorAppeal: Ahika Sakura seems to really like busty girls and bishounen.
* BabiesEverAfter: [[spoiler: The original Sekirei and their Ashikabi that survived went on to have children. This is where the modern Ashikabi come from.]]
* BadPowersGoodPeople: Shiina, Yukari's Sekirei, has powers that make everything rot and die but he is one of the kindest and sweetest people in the manga and is actually scared by Yukari's brutal treatement of defeated Ashikabi.
* {{Badass}}: Every Sekirei is supposed to be this to varying extents.
** BadassBiker: Matsu, in the anime. Sanada of the West is also one.
** BadassBookworm: Again, Matsu. She is one of the single-digit Sekirei, after all. If she has to fight, she will turn into a biker babe with a bazooka.
** BadassCrew: Minato, Seo, and Sanada's harems all count.
** BadassNormal: Seo and Sanada, who both ignore the rule about Ashikabi not fighting. Minato by the end of Season 2. [[spoiler: He fought Haihane to save Kazehana, and was doing a damned good job considering Haihane could've sliced him to ribbons had it not been for being dizzy from the fumes of alcohol, and he also survives several things like having a roof collapse on him, and takes so many wounds for his Sekirei he's practically MadeOfIron. And, by the end of Season 2, having the sheer balls to stand up to Karasuba, especially when she could have effortlessly killed him, should be proof positive he's taken several levels in badass.]]
*** [[spoiler: He actually managed to knock out Haihane in the Sake warehouse twice.]]
** LittleMissBadass: Kusano, at least at anime episode 11 where she carried a big grenade launcher atop Matsu's motorcycle.
*** Yukari, who eventually gains the all-too-appropriate nickname [[NamesToRunAwayFromReallyFast "Devil Ashikabi"]].
** RetiredBadass: [[spoiler: Miya.]]
*** [[spoiler: Just to illustrate how badass Miya is, during the invasion of the island in the BackStory the other 4 disciplinary members went around taking out tanks and helicopters. While Miya, ''cut battle cruisers in half lengthwise, from a cliff'' without breaking a sweat.]]
* BadAssDecay: Haihane and Benitsubasa. In Season 1, they were pretty tough, but in Season 2, while Beni beats one random Sekirei up, they both aren't nearly as tough as they were earlier. Even Minato manages to land a couple of hits on Beni, and rolls a bottle on a slightly tipsy Haihane, who trips on it.
* BalancedHarem: Minato is equally devoted to each of his Sekirei, who are TrueCompanions and happy with sharing him.
** Sanada of the West and his [[AffectionateNickname Lovelies]] are this as well.
* BandageBabe: Haihane.
* BarehandedBladeBlock: Musubi. She tries (and fails) this against Miya, but later shows how much she's learned by catching (and breaking) Yomi's SinisterScythe.
* BashBrothers: Common among teams with multiple Sekirei. Musubi with Tsukiumi, Homura with Kazehana or [[YinYangBomb Tsukiumi]]. Sanada's trio as well.
* BattleHarem: Minato is the primary example, but Sanada's PowerTrio and Seo's twins count as well. The villainous examples play with this, in completely different ways: Mikogami has a collection rather than a romantic harem, Higa considers his harem to be [[{{Mook}} employees]], and the Discipline Squad suffer from IncompatibleOrientation with their [[StraightGay Ashikabi]].
* BeachEpisode: Another Omake.
* BearsAreBadNews: Musubi occasionally has an animal avatar of a bear appear behind her, and the bear fist is one of her attacks.
* BeePeople: The Sekirei are hinted to be this, as Takami once explained to Kusano that #01 was "their queen". [[spoiler: Miya]] is vague about exactly what she is, but clarifies that she is something completely different from her "107 feathers".
* BettyAndVeronica: Musubi and Tsukiumi.
* BetweenMyLegs: Of Musubi in episode two.
* BeautyIsNeverTarnished: While they do get visibly injured in battle, Haihane is the only Sekirei thus far to have any visible scarring. It's suggested that they heal better than humans, and MBI provides them with ''exceptional'' medical treatment when necessary. [[spoiler: Karasuba mentions that she only has a small scar left after Miya nearly killed her, thanks to MBI's treatment.]]
* BewareTheNiceOnes: Miya may appears to be a very nice landlady, though everyone in the house are deathly afraid of her. Of course, she is [[spoiler: Sekirei Number 1, not a [[BadassNormal badass normal]] you think she is at first]]. Cue [[DemonHead demon head]] and [[GlowingEyesOfDoom glowing eyes of doom]] every time she is angry.
** It's not clear whether the ghostly head is something she invokes or if it's a visual shorthand for the respectful terror other Sekirei have for her.
** She also can do it over the phone, which freaks the hell out of Seo. Minato uses this against him when he initially wants to charge Haruka for helping escape the city with Kuno. Although Seo agrees to it, he puts Minato in a headlock afterwards. Nevertheless, he sticks to his word and helps out as much as he can.
** Shiina, who more than earns his title as "Death God".
** Minato himself, once he begins to fight seriously with the intention of winning the Sekirei Plan. He proves to be an [[GuileHero excellent]] strategist and takes full advantage of his harem's strengths and unique abilities.
* BiTheWay: Minato, Yukari, Musubi, Homura, and Mutsu. Several other characters are more ambiguous but may be this as well, such as Uzume and Mikogami.
** IfItsYouItsOkay: Mutsu states that he would have preferred a woman, but readily accepts his reaction to his [[HoYay male]] Ashikabi. This seems to be the case with Homura as well, though [[SuspiciouslySpecificDenial he tells himself otherwise]].
* BigBallOfViolence: Seo and the Ashikabi of the West get into one because of mist, complete with fighting sounds. In season 1 Seo gets his ass kicked by his own Sekirei for being a pervert in this manner.
* BigBadWannabe: Nothing definite, but certain chapters seem to have Higa headed in this direction. His team was pretty much [[CurbStompBattle Curb Stomped]] during the third fight of the third round, and Minaka seems to be becoming interested in taking him out.
* BigBreastPride: Breast size happens to be SeriousBusiness to many Sekirei. Minato's harem often compare their sizes, arguing over who has the largest assets ([[CoolBigSis Kazehana]], naturally).
* BigBrotherInstinct: Minato, Shiina. Kazehana also states many of the Single Numbers feel this way towards the rest of the Sekirei, which makes it a TearJerker since they're pretty much guaranteed to end up terminating their little sisters (and brothers).
* BigDamnHeroes: Tsukiumi does this at the end of Season 1, but it's subverted because she's fighting 2 against 1 and as a distraction, so she ultimately loses. Played straight with Yume when she emerges shortly afterwards.
* BigEater: Every single Sekirei out there, but especially Musubi who finishes a meal for ''ten'' by herself in episode one.
* BigGood: Minato, by virtue of having the majority of the good guy Sekirei at his command. Seo is a lesser example, and Miya is a psuedo mix of this and HaremNanny.
* BikerBabe: In a surprising bit of anime-original material, ''Matsu'', and it makes her come off as a genuine BadassBiker instead of a lame attempt at {{Fanservice}} as well.
* {{Bishounen}}: The extremely rare male Sekirei are this, if Mutsu, Shiina, Amebane, and Homura are any evidence.
** Kagari/Homura [[spoiler:is actually a {{Bifauxnen}}, albeit [[TheCallKnowsWhereYouLive forcefully]]]].
* BlandNameProduct: Once in a while you can see {{Sony}} Vaio laptops with blanded name
* BlessedWithSuck: If you [[FridgeHorror think about it]], most Ashikabi's have this. You've been given one or more hot members of the opposite sex who love you completely, and perfectly understand you. Then you have to watch them fight to the death (or whatever it is) with other people, and you'll probably lose him/her. And to top it all off, you know the other people you're fighting are fighting for the exact same reasons ''and just lost the person they love because of you.''
* BloodKnight: Karasuba.
* BlueWithShock: Happens to some characters from time to time.
* BonusEpisode: Episode 0, a MeasuringDay[=/=]BeachEpisode[=/=]HotSpringsEpisode trifecta included on the first ''Pure Engagement'' DVD.
* BookDumb: Minato is actually very intelligent, but he does badly in school since he cannot perform well when under pressure.
* BoundAndGagged: Happens to Musubi in the ''Sekirei Diagnosis'' OVA - when Karasuba offers to measure her, she ties Musubi up in the measuring tape. Musubi complains about the tape being too tight, but the noises and expressions she makes indicate she's loving every moment of it.
* BoyMeetsGirl
** CrashIntoHello: Minato and Musubi, Yukari and Shiina.
** GirlOfMyDreams: Minato and Kusano, Minato and Tsukiumi.
** SamaritanRelationshipStarter: Haruka bought Kuno some meatbuns on a cold winter day.
** RescueRomance: Mutsu and Mikogami.
* BornWinner: The Single Numbers, who are inherently more powerful than other Sekirei. Mutsu hints that this is because their further development when found meant that MBI had less of a chance to [[PowerLimiter control]] their powers.
* BridalCarry: Minato does this for Musubi in the first episode when she's unable to move in an attempt to escape from Hikari and Hibiki.
* BrokenBird: Kazehana, Homura, Akitsu.
* [[spoiler:BuryYourGays: Poor Uzume...]]
* ButtMonkey: Several examples:
** Seo to Hibiki and Hikari.
** Minato whenever his Sekirei are fighting over him.
** Matsu to Homura, and especially Miya anytime she accidentally does/says something Miya doesn't like.
** Minaka to Takumi. While he may be the CEO of MBI, that doesn't stop her from whacking him if she feels he's stepped out of line.
** Everyone beaten up by Yukari while she's helping Shiina search for Kusano.
** Benitsubasa towards Haihane, and in one episode, to Kusano and Kazehana, who both hang up the phone on her when she's trying to blackmail Musubi. The look on her face is hilarious after they hang up on her.
* BuxomIsBetter: Repeatedly emphasized in this series, especially in the ''Sekirei Diagnosis'' OVA. Bust size is SeriousBusiness for Sekireis!
** The show's page on Funimation's website flat out states this with zero subtlety, actually posting a trailer advertisement with the caption "Boobies for the win!"
* ByThePowerOfGreyskull: Sekirei gain power with a kiss and an incantation, called a norito. Each Norito is unique to that Sekirei:
** Musubi: By the fists of my contract, my Ashikabi's perils will be shattered.
** Kazehana: By the forewinds of my contract, my Ashikabi's dark clouds will be blown away.
** Homura: These are the flames of my pledge, burn the Karma of my Ashikabi.
** Shiina: By the corpse of my pact, my Ashikabi's burdens shall withered.
** Tsukiumi: This is the water of my pledge, purify the evil residing in my Ashikabi.
** Hikari and Hibiki: By the thunderstorm of our pact, our Ashikabi's perils will be destroyed.
** Uzume: By the veil of my contract, my Ashikabi's nightmares will be dispelled.
** Kuu and Matsu's haven't been revealed yet.
* CallingYourAttacks
* CantHoldHerLiquor: Haihane in the anime. [[spoiler: Too bad for her she got in a fight in a warehouse storing sake...]]
* CaramelldansenVid: Musubi and Kusano both do this when Uzume first gives them costumes to try out in episode 4 of Season 1.
* CasanovaWannabe: Seo Kaoru sure would have gotten far if not for [[ClingyJealousGirl those two Sekirei]] [[ElectricTorture of his]].
* CastHerd: Primarily divided along the territories of the major Ashibaki -- North (Minato and his allies), South (Mikogami's group), East (Higa's group), and West (Sanada's trio), as well as the employees of [[MegaCorp MBI]].
* CatFight: Completely avoided. While there is ClothingDamage and plenty of other bits of fanservice involved, the fights are treated seriously and can be downright ''brutal''.
* CatSmile: Musubi and Kuu tend to display one when they're happy.
* TheChampion: Uzume to Chiho, Mutsu and Akitsu to Mikogami, Shiina to Yukari and Kusano.
* ChangedMyMindKid: Tsukiumi comes to help out at the end of episode 12 after Miya gives her a pep talk about how the other girls are in the lead against her because she was refusing to help while the other three girls did what they could. Subverted in that she doesn't stop the two discipline squad members, although she did delay them.
** Played straight with Uzume as well. She decides to help Kuno escape rather than kill her as ordered to.
* CheatersNeverProsper: Higa engages in a variety of schemes to defeat MBI and Minato, including blackmailing Uzume [[spoiler: and Shiina]] into working for him, kidnapping [[spoiler: Yukari with the intention of forcing her to marry him]], and stealing the Jinki from others. This eventually leads [[FairPlayVillain Mikogami]] to [[EnemyMine step in]], as well as triggering his VillainousBreakdown after [[spoiler: Minato's team rescues Chiho, terminates four of his Sekirei, Uzume betrays him, ''and'' Yukari sets fire to his penthouse before escaping with Shiina]]. Even though he's one of the last Ashikabi standing, he's completely outmatched by the others and has essentially lost all his former edge.
* ChekhovsGunman: All the Sekirei that Minato come to wing appear in the 3rd chapter (or 0.3), except Kuu, and even she got a mention. Akitsu also appears...
** Kaho and Oosumi are first spotted when Homura recalls his time serving as the Sekirei Guardian. They later show up, and turn out to be a fairly significant pair.
** In a one-shot omake and Drama CD, an Ashikabi and Sekirei get [[ATwinkleInTheSky blasted off into the distance]] by Shiina after they were fooled into accepting a fake bounty on Yukari. They later show up at the beginning of the 4th Match, just in time to create a panic by recognizing Yukari and Shiina. [[spoiler: We later learn they managed to escape the city, and ended up befriending Haruka and Kuno. Their news about the current events in the Sekirei Plan inspire Haruka to write Minato a letter encouraging him to win.]]
* ClarkKenting: Spoofed. Kagari is absolutely baffled at Tsukiumi's inability to recognize him as Homura just because of the black mouth-cover he wears when fighting. When Tsukiumi [[http://static.tvtropes.org/pmwiki/pub/images/Sekirei_Vol.7_-_072.jpg finally connects the dots]], she quite visibly feels like a moron.
** Also seen in the anime when Tsukiumi ''saves'' Kagari, who's not wearing the mask at the time. {{Justified|Trope}} InUniverse with remarks by Homura mentioning later that she didn't see his face because it was really dark in the alley at the time, and later in Season 2 when Tsukiumi also mentions that she didn't take a good look at his face because it wouldn't be proper.
** Musubi also once thought Homura was Kagari, and then did a doubletake and said it wasn't him because Kagari "doesn't wear a mask".
* CliffHanger: Season 1 ends with Haruka and Kuno successfully escaping, but a lot of loose ends are shown which have yet to be resolved, and Minaka mentions that the game is far from over, which ultimately leads into the second season.
* ClingyJealousGirl: Tsukiumi changes from a {{Tsundere}} to this after her winging, Kusano also appears to learn to behave this way from her. Also Hikari and Hibiki (the former having a shorter fuse than the latter) do not let Seo to wing another Sekirei, and will immediately zap him if they catch him trying to do that. They don't mind if he takes a male one like Shiina though.
** Although its very subtle, when Musubi sees Minato getting a little too friendly with Tsukiumi, a bear aura will pop up behind her briefly, which scares them the same way Miya's aura does.
* ClosetKey: A bisexual-variant. Minato and Homura are this to each other, and Mikogami is implied to be this for Mutsu.
* ClothingDamage: Musubi is especially prone to this; her clothing must be made of tissue paper. {{Justified|Trope}} in how Sekirei are beating the crap out of each other with various supernatural abilities, most of which are more than strong enough to destroy easily clothing and ''buildings'' but leaving Sekirei fairly intact, and Musubi in particular has to get close to ''punch'' them... Apparently strongly enough to strip them, too.
** Used as a common tactic in duels, since the Sekirei Crest at the base of their neck provides a OneHitKill.
* ColorCodedCharacters: All of the Sekirei have different hair colors, and wear different clothing to make it easier to tell them apart. Slightly subverted at first with Kagari, Takami, and Takehito, as they have similar hair color/styles.
* ColorFailure: Matsu completely whites out when Minato innocently asks who Sekirei #01 is, right before Miya shows up.
** A random guy loses his color after Yukari kicks him in the groin to try and get info from him on Kusano's whereabouts.
* CombatStilettos: A large percent of Sekirei seem to wear high heels.
* CompletelyMissingThePoint:
** In episode 8, after hearing Matsu mention a Sekirei mysteriously defeating and leaving their opponents before MBI can confirm the fight, Minato has a talk with all his current Sekirei about it, since he's worried about their safety. Both Tsukiumi and Musubi mention that they want to fight her since she's so strong, and develop a BattleAura. Even Kuu develops one, much to Minato's chagrin. Matsu meanwhile, continues to snicker at his inability to control the situation.
** Later in Season 2, after Matsu reveals she was one of the original 5 Sekirei, Minato and some of the others are surprised at this fact. She reveals some more information, but they're still completely shocked at the fact that she was one of the original Discipline Squad members. She puts on a cute pouty face afterwards.
** [[NobleTopEnforcer Mutsu]] makes a heartfelt confession of his devotion to his master, using video game comparisons. Mikogami takes this to mean if he wins, he'll get all the Sekirei and be the only one playing~! Mutsu wonders if he was even paying attention at all.
* CompressedAdaptation: A fine example, too. The anime uses only the most important bits, moving along at a brisk pace.
* CoolDownHug: Minato literally gives one to a blazing Homura.
* CovertPervert: Yukari at first appears to be a very well off, but soon, you see her getting NoseBleed around Shiina and even struggling trying ''not to peek'' at him taking shower. She later tries to [[ThanksForTheMammaries grope]] Tsukiumi in Season 2, but the latter runs off before she gets a chance to. The face she makes creeps out Tsukiumi in the process.
* CrossCounter: [[http://www.mangahere.com/manga/sekirei/v09/c076/16.html Seo and the Ashikabi of the West]].
* CrossPoppingVeins: Several characters display one from time to time, especially Tsukiumi when the other Sekirei try to claim them over her.
* CurbStompBattle: In the manga and anime, we're shown an invading international army against the first disciplinary squad. Army lost big time, and there were only 5 of them(sekirei). Later this is proven even more when Karasuba massacres so many soldiers their bodies pile on each other.
** Musubi loses somewhat easily to Benitsubasa, but then when [[spoiler: Yume takes control of Musubi's body temporarily]], she easily defeats both Benitsubasa and Haihane.
** Karasuba and Shiina are both infamous among the Sekirei for these.
* CuteClumsyGirl: Kuno, pretty standard version.
** Haihane and Akitsu to lesser extent. The former sometimes forgets to remove her claws so that she often stab herself in the face, the latter ... forgets to wear panties!
* DarkAndTroubledPast: The first generation Discipline Squad: [[spoiler: Miya]], Matsu, Kazehana, Karasuba, and Mutsu, who were forced to slaughter human armies to protect the 103 infant Sekirei. For Karasuba, it may have been her StartOfDarkness, since she enjoyed killing so much. The others eventually walked away from it, and avoid talking about it. It's safe to assume the person responsible for erasing all data on the 1st generation was Matsu.
** Akitsu due to the events that caused her to become a Scrapped Number. [[spoiler: The Tuner that messed her adjustments up was fired as a result, and took out his rage on Akitsu. He told her everything was her fault, and attempted to strangle her to death for being a failure.....forcing her to kill him in self-defense]].
* DangerouslyGenreSavvy: Several examples:
** Minaka often welcomes players trying to change the rules a little bit, and will act accordingly to counteract their plans, such as sending troops to the area Minato is trying to help Haruka and Kuno escape. Even at the end of Season 2, Matsu mentions hacking Minaka's spacecraft to leave him hopelessly stranded in orbit, but she says that he'll probably figure out how to regain control (which he does a few moments later, and makes a point to mention that).
** The Discipline Squad knows exactly where to go when Minato is trying his escape plan at the end of Season 1. And in Season 2, after their first fight, Benitsubasa closes off the walls to force Kazehana to fight in a small area where she can't use her wind magic effectively. Haihane does something similar with Tsukiumi, luring her into a room where she can't easily escape with her water magic.
** Miya and some other residents of Maison Izumo seems to know a lot more about the Sekirei plan and MBI's ambitions than they should. However, its gradually revealed that they knew about Minaka's plans all along, and either tried to fight against it, or else ran away to avoid taking part in it. Miya claims she could kill Minaka if asked to, but Matsu mentions that the city would get destroyed in the process.
* DayInTheLimelight: [[ExactlyWhatItSaysOnTheTin Kuu's Summer Party]].
* [[spoiler: DeathByAdaptation]]: [[spoiler: In the anime, Uzume. She dies in the manga, too, just a bit later.]]
** Sort of. In the anime, she is confirmed (by an onscreen computer screen) [[spoiler: to be still alive, but greatly injured. In the manga, it has been said that if Minato wins the tournament, he can bring Uzume back.]]
* DeclarationOfProtection: One of Minato's motivation for helping out the Sekirei. This is also why Haruka took pity on Kuno and decided to be her Ashikabi.
* DefeatByModesty: Played straight in many cases, but Musubi early on is seemingly [[InnocentFanserviceGirl immune to this]]. Miya also did this to Tsukiumi in a training session.
--> ''Musubi'' "And I even protected my modesty this time."
--> Arrows point out that she's only wearing panties.
* DemonHead: Done mostly by Miya [[spoiler: It seemed she learned from her husband, Asama Takehito, back when she first was being adjusted]]
** Somehow, Yukari later learn to do it as well, and thus the title '[[RedBaron Demon Ashikabi]]'.
* DeniedFoodAsPunishment: Miya often threatens to do this to Seo, and Matsu when she's fooling around with Minato, and by extension, Minato.
* DepravedBisexual: Yomi. People also ''think'' the Ashikabi of the North (Minato) is this, due to the rumors about his harem.
* DesertedIsland: Kamikura Island, a mysterious island that rose up out of the sea and revealed the crashed Sekirei ship. Minaka initially hoped that it would turn out to be a MonsterIsland as well. He got HumanAliens instead.
* {{Determinator}}: Musubi.
* DevotedToYou: The bond between an Ashikabi and their Sekirei naturally results in this. Usually, the later is the devoted one with a side of SubmissiveBadass, though exceptions do exist.
* DiabolusExMachina: In the manga, [[spoiler:Uzume was about to rejoin the Izumo Inn (the chapter is named ''Welcome Home'') when, out of nowhere, one of Higa's Sekirei attacks Minato in a final attempt to kill him and Uzume [[TakingTheBullet takes the attack and in the next chapter dies]].]]
* DisappearedDad: The only mention of Minato's father is 'unknown', by ''Matsu''. You just know something's up when the information Sekirei has no clue.
** Or more likely, Miya's forbidden her to reveal it.
** [[spoiler: Pretty much confirmed to be Minaka.]]
* DistressedDamsel: [[spoiler: Yukari]] becomes this for awhile. It is eventually subverted when she realizes she shouldn't just be waiting for a rescue and starts trying to escape on her own. With a SlasherSmile to boot!
* DoesThisRemindYouOfAnything: The winging scenes in the anime version seem a little ''too'' sexual.
** When Karasuba rants to Musubi about how glorious their final battle will be, she grabs her roughly, shoves her against the wall and the hilt of her sword presses up against Musubi like an erection, all while wearing a crazed, lustful expression. It's one of a handful of instances in the series of one character coming on to another that ''isn't'' played for laughs.
** Sekirei can be winged against their will, by any Ashikabi that is able to kiss them. It is described at one point as "taming" them, and Mikogami's attempts to capture first Kusano, and later Shiina, have a rather disturbing undertone to them.
* DontYouDarePityMe: Homura thinks Minato just sees him as yet another "prize" to add to his Sekirei "collection". However, Minato convinces him that he is truly concerned about him as a person, as Homura was one of the first people who [[BecauseYouWereNiceToMe helped him out when he first got kicked out of his apartment.]] Aside from that, he also mentions that other people were worried about him, and didn't want to see him do a SenselessSacrifice.
* DoubleInLawMarriage: Technically, since Sekirei consider the bond with their Ashikabi to be equivalent to marriage. Minato and Yukari's respective Sekirei, Kusano and Shiina, consider each other to be siblings.
* DoubleStandardAbuseFemaleOnMale: Several examples:
** Hibiki/Hikari towards Seo.
** Takami towards Minaka.
** Tsukiumi towards Minato (usually in the form of using water on him).
** Yukari towards various male Ashikabis (although in one case, the guy deserved it for pulling a knife on her after he lost his Sekirei battle to her).
** Made all the more striking by the introduction of an abusive ''male'' Sekirei and his [[MadLove female Ashikabi]]. On the surface, his actions aren't much different (mocking, yelling at, pushing around) but it is played as deadly serious and a MoralEventHorizon.
* DoubleTake: In episode 8 of the first season, Minato feels at ease after having a private talk with Tsukiumi about her not losing a fight, which he had with Musubi in an earlier episode. He then wonders out loud if they're not the same despite their differences. He opens the door slightly, and sees Musubi standing by the door. He nonchalantly closes it for a few moments, then opens it again, and after she says something to him, he screams, wondering if Musubi just heard what he said comparing the two girls.
* TheDragon: Each villain seems to have one. Minaka has [[BloodKnight Karasuba]], Mikogami has [[NobleTopEnforcer Mutsu]], and Higa has [[VillainousFriendship Kakizaki]]. Taken from the viewpoint of ''other'' Ashikabi, Shiina is this to Yukari.
* DragonsUpTheYinYang: The Sekirei crest includes a taijitu (the Yin Yang symbol). Tsukiumi and Homura also each use a dragon-themed attack.
* DueToTheDead: One of the rules of the Sekirei Plan requires the victor to stand guard over their terminated enemy until MBI is able to retrieve the body. Musubi in particular in shown to take this very seriously, watching over them with a somber expression. That [[spoiler: Uzume]] does not do this is considered a ''serious'' offense, earning her the label of a "heretic".
* {{Ecchi}}
* ElementalPowers: Quite a few Sekirei (especially low-numbered ones) have some sort of elemental power. Specifically:
** GreenThumb: Kusano - 108.
** ShockAndAwe: Hikari and Hibiki - 11 and 12.
** PlayingWithFire: Homura - 06.
** MakingASplash: Tsukiumi - 09.
** BlowYouAway: Kazehana - 03.
** AnIcePerson: Akitsu - [[spoiler: 07.]]
** HolyHandGrenade: apparently [[spoiler: Yume - 08.]]
** WalkingWasteland: Shiina - 107.
** DishingOutDirt - It is implied that Mutsu's [[ShockwaveStomp powers]] may be this.
* EmotionlessGirl: Akitsu.
* EnemyMine: Higa's attempts to steal [[McGuffin the jinki]] from others prompts Mikogami to come to Minato's aid on multiple occasions.
* ETGaveUsWiFi: [[MegaCorp MBI]] was established using the technology found with the Sekirei.
* EvilLaugh: Minaka sometimes.
* EyesAlwaysShut: Karasuba.
* FacelessGoons: Those MBI soldiers.
* {{Fanservice}}: Oh yes.
** Cranked UpToEleven in the ''Pure Engagement'' OVA ''Two Gossips Topic'', which chronologically takes place after Season 1 but before Season 2, features a MeasuringDay in the first half, and a BeachEpisode in the 2nd half. Virtually all of the main women in the show are topless for pretty much the entire episode.
* FanNickname: The series is often simply referred to as "''{{Pokemon}}'' with tits", with each member of the UnwantedHarem having a different ''{{Pokemon}}'' related nickname:
** Hitmonchan/Ursaring -- Musubi, the power to hit with fists which ocassionally show an image of a bear..
** Blastoise -- Tsukiumi, for her water powers
** Bulbasaur -- Kusano, for her plant powers.
** Pidgeot -- Kazehana, for her wind powers.
** Porygon/Alakazam -- Matsu, use of electronics/machines and being highly intellectual.
** Charizard -- [[spoiler:Homura, for his/her fire powers.]]
** Mew - Miya, for simply being the strongest/Rarest.
* FantasticRacism: A few Sekirei hold extremely negative attitudes towards humans, viewing them as an inferior species. Attitudes range from [[PunyEarthlings simple disdain]] to wanting to [[KillAllHumans kill them all]].
** Higa shows this to Sekirei as well. The most notable example is when he convinces Shinna that Yukari prefers humans.
* FateWorseThanDeath: Broken bonds are considered this by the Sekirei, who would rather tolerate a cruel Ashikabi than lose their bond. Akitsu's situation as a Scrapped Number also counts, as she is incapable of being winged in the first place.
* FauxAffablyEvil: Higa, Kakizaki, Natsuo, Karasuba.
* FingerlessGloves: Many, many Sekirei have them. Most common for fist or weapon types.
* FiveManBand: Minato's harem:
** TheHero: No. 88 Musubi.
** TheLancer: No. 09 Tsukiumi.
** The CuteBruiser: No. 108 Kusano.
** TheSmartGuy: No. 02 Matsu.
** CoolBigSis: No. 03 Kazehana
** TheSixthRanger: [[spoiler:No. 06 Homura.]]
* FiveBadBand: MBI's forces, as well as the Sekirei from the South.
** BigBad: Minaka Hiroto (MBI), Mikogami (South).
** TheDragon: Karasuba (MBI), Mutsu (South).
** EvilGenius: Natsuo (MBI), Taki (South).
** TheBrute: Benitsubasa and Haihane (MBI). Yomi, Mitsuki, Mitsuha, Himeko (South).
** DarkChick: Takami (MBI), Akitsu (South).
* ForegoneConclusion: [[TheHero Musubi]] and [[FinalBoss Karasuba]] will battle at the conclusion of the Sekirei Plan. How exactly they will reach that point, and whether or not she will fight alone is unclear.
* TheFourLoves: To be expected, in a series that focuses heavily on the [[ThePowerOfLove power]] [[TrueCompanions of]] [[YouAreNotAlone bonds]].
* FullContactMagic: Many Sekirei's abilities function like this, channeling their powers through weapons or physical attacks.
* FuroScene: The Izumo inn's bath provides many opportunities.
** Also, there was an omake story specifically about a trip to a "neutral ground" hot spring.
* GeckoEnding: The anime diverges from the manga around the time Homura gets winged. In the manga, Stage 3 starts immediately after this, while Minaka only hints at starting it at the end of Season 2 of the anime. Uzume's arc gets drastically changed as well. Minaka still offers to help in both versions, but in the manga [[spoiler: Uzume was still alive when they got her to MBI, and she [[HeroicSacrifice saves]] Minato rather than Musubi in the manga]], and Minato doesn't play as active a role in the manga of helping Chiho. Nor did Minaka implement the rule of deactivating Sekirei with no wins, or blow his building up (yet anyway...) in the manga.
** Kazehana also gets "winged" right after Minato helps Kuno and Haruka escape in the manga, whereas in the anime she does it in Season 2. She also takes a much more active role in helping out in the manga, rather than the subtle offscreen help she provides in the anime.
* GenderBender: [[spoiler:Homura, who finds himself growing breasts when he becomes the last unwinged Sekirei]]. TheCallKnowsWhereYouLive and it is a ''pervert''.
* GenreSavvy: Minato.
* GirlOnGirlIsHot: Matsu gets a suspicious look after accidentilly kissing Musubi, and becomes interested in relations between Sekirei.
* GiverOfLameNames: Haruka's names for Kuno's attacks, which she's not very fond of.
* GlowingEyesOfDoom: Miya will use these if she is ''really'' pissed off. Hikari and Hibiki also use this when they are angry with Seo. Yukari starts sporting it later as well.
* GroinAttack: Yukari's favorite way to 'punish' abusive Ashikabis. This is because Shiina refuses to do it for her.
* GuyOnGuyIsHot: Matsu gets a... suspicious... look when Seo wants to "get along with" Minato as men during the hot springs omake. She's also ''very'' interested in asking her old squadmate about his male Ashikabi.
-->'''Matsu:''''' Mutsu-tan! Mutsu-tan! Matsu has always wanted to ask! Why did you choose a male Ashikabi to....hehehe!''
-->'''Mutsu:''''' Don't talk to me, Pervert.''
* HadakaApron: Present and correct.
* HalfHumanHybrid: [[spoiler: All modern Ashikabi are the descendants of matings between Sekirei and humans several centuries ago, and still close enough to their non-human heritage that that the jinki classify them with Sekirei rather than humans.]]
** [[spoiler: This is further driven home when they arrive on Kamikura Island, and learn that the island gives off unique energy due to centuries of exposure to the Sekirei's ship. Humans are immune to it, and Sekirei filter it harmlessly through their cores.....but the energy is toxic to Ashikabi since their bodies absorb it like a Sekirei, but lack a core to process it safely.]]
* {{Hammerspace}}: Matsu pulls a large gun on Musubi in the bath, even though she's only wearing a towel. Minato even lampshades this.
* HardDrinkingPartyGirl: Kazehana.
* HaremGenre
* HaremNanny: Miya, though she comes down hard on anything too ero-ero in the house.
* HeelFaceTurn: Hikari and Hibiki, who started out attacking Musubi and were longtime enemies of Homura. They quickly become some of Minato's most important allies, once he moves into Izumo Inn and becomes friends with Seo.
* {{Hermaphrodite}}: [[spoiler:After Minato winged him, Homura's feminine body structure and breasts remain, but it is heavily implied that he retains a certain significant male part. At least, it would seem so when the entire harem is shown nude -- Homura and Minato are the only ones with their groins covered. To date, he's still somewhat disoriented as to his feminine body's reactions, and there's a RunningGag where he can't decide whether to go in the male or female side of baths or changing rooms.]]
* HeroicSacrifice:
** [[spoiler: At the end of a battle between Minato and Higa's Sekirei, Toyotama attempts to kill Musubi by stabbing her with a lance before fleeing. Musubi is saved, however, when Uzume [[TakingTheBullet jumps in her way and gets herself stabbed instead.]] Uzume would die from her injuries shortly afterwards.]]
** In the manga, [[spoiler: Uzume tried to block the attack from Higa's Sekirei which was aimed at Minato.]]
** [[spoiler: Takehito focused the unstable power of the Jinki on himself to save Minaka, Takami, and the Sekirei unable to flee the MBI building.]]
* HeroicSecondWind: Musubi [[spoiler: or is it Yume?]] recovers at the end of episode 12 to [[CurbStompBattle beat up]] the Disciplinary Squad after Minato's HeroicResolve to not abandon his friends and Sekirei helps to revive her.
* HeyItsThatVoice: Some character voices are both fresh and veteran ones on the mix.
** Kusano is a shy girl from [[{{Durarara}} Ikebukuro who holds the Slasher Army.]]
** Tsukiumi is the [[{{Persona 3}} red-head female protagonist with an evoker on her head.]] And she is [[{{Minami-ke}} BOSSU.]]
** [[{{Code Geass}} Hayato Mikogami (The Ashikabi of the South) is planning to dominate the world, with Kazehana on his back.]]
** Miya is [[UminekoNoNakuKoroNi PAAFEKKTO!!]]
** Homura, [[AxisPowersHetalia aru?]]
** Too bad Karasuba isn't a white haired, short tempered boy who can summon dragons [[Manga/{{Bleach}} made of ice, or is she?]]
* HollywoodTactics: An invading army with tanks, helicopters and ships? Group the Tanks within spitting distance of each other. The same for the helicopters that are maybe 50 ft in the air directly above the tanks. And have your support warship hanging out right off the coast.
* HopeBringer: Higa ''pretends'' to be one on occasion, in order to manipulate other Ashikabi. Being the real deal, Minato is ''not'' fooled.
* HostileShowTakeover: The OnTheNext for ''Pure Engagement'' episode 0 is an extended skit with the ''entire cast'' declaring what the new season will be about. Needless to say, their ideas on it vary considerably.
* HotSpringsEpisode: As an omake.
* HumanAliens: All the Sekirei.
* IDidntMeanToTurnYouOn: The Sekirei realizing who their Ashikabi are get horny when wanting to get winged. And poor Minato, even AFTER winging his Sekirei, most of them still get horny and want/find ways to get laid by him, they HORRIBLY fail thanks to Miya.
* IdiotHair: Musubi, Hikari, Shijime, Kujika, Mikogami, and ''Karasuba''.
* IllGirl: [[spoiler: Chiho, Uzume's ashikabi]]
* ImmodestOrgasm: Not a ''real'' one, but it certainly sounds like it when they Sekirei get "winged" in the anime.
* ImpossiblyCoolClothes: Quite a few Sekirei wear outfits that are impractical, to say the very least.
* ImprobablyFemaleCast: Out of the 108 Sekirei, there are only 4 known males. [[spoiler: One of which ends up a GenderBender.]] They're all insanely pretty {{Bishonen}}, and evenly divided between [[HoYay male]] and female Ashikabi.
* InASingleBound: Sekirei are, with a few exceptions, capable of jumping several stories. RoofHopping is a common method of getting around, as a result.
* IncompatibleOrientation: Natsuo and his three female Sekirei. [[HopelessSuitor Benitsubasa]] seems to think she can [[CureYourGays change that]].
* InnocentCohabitation: All of Minato's harem sleeps in his room, until they're reshuffled elsewhere for having the room get too crowded.
** Yukari and Shiina, Haruka and Kuno, and Mikogami and his harem all appear to also be innocently living together. Seo, on the other hand, is MOST [[ComeBackToBedHoney DEFINITELY]] not living innocently with the twins.
* InnocentFanserviceGirl: Musubi at first, though she eventually catches onto the concept of "modesty".
* InstantBandages: Minato has some on his head after Tsukiumi lands on him.
* InterspeciesRomance: And HOW!
* InvoluntaryBattleToTheDeath: Occurs frequently, due to the nature of the [[ThereCanOnlyBeOne Sekirei Plan]]. The Discipline Squad is tasked with preventing anyone from escaping, and even punishing those that refuse to fight.
** [[spoiler: The 4th Stage centers on this trope, as two teams of Sekirei are forced to fight in a sealed area. If one team hasn't terminated the other within an hour, both teams will be terminated -- Sekirei ''and'' Ashikabi alike. The first match-up? Minato vs. Seo, forcing the longtime allies to fight to the death.]]
* ItAmusedMe: Minaka's Sekirei Plan game. While he has a set of rules regarding the Sekirei plan, he will often set up a new rule or change his plans slightly based on what's going on. Such as killing off any Sekirei with no wins within a certain period of time to encourage them to fight, setting up obstacles to prevent some Ashikabi/Sekirei from escaping the city, or agreeing to help Minato, but then making a bunch of other Ashikabi attack him before he can get to MBI's headquarters. Will generally earn him a MegaTonPunch from Takami once she gets wind of changes to his plans.
* JerkAss: Pretty much '''everyone else''' outside of Izumo Inn, including Minato's mother and sister. The more sympathetic ones are typically portrayed as [[JerkWithAHeartOfGold Jerks With A Heart Of Gold]].
** Outright aversions include #95 Kuno (Haruka's Sekirei), #107 Shiina (Yukari's Sekirei) and Chiho Hidaka.
** Ashikabi of the East, Izumi Higa, takes the cake however. Hell, even ''[[MadScientist Minaka]]'' doesn't give a crap about him anymore and wants him ''out'' of the Sekirei Plan.
* JerkWithAHeartOfGold:
** Seo Kaoru, at least his two Sekirei will [[ElectricTorture 'discipline']] him if he goes too far. Hikari and Hibiki somewhat count as well, given they were introduced targeting unwinged Sekirei for practice yet are good-natured deep down.
** Seemingly that Ashikabi of the West guy too, since he's almost a carbon copy of the above (something lampshaded in the actual manga)
** Haruka Shigi as well. He can be blunt, thoughtless and short-tempered, but cares enough about Kuno that he despite her plain appearance, ''she's'' his Sekirei and nobody else. He even refuses to force her participation in a 'Game' they can't win.
* KamehameHadoken: Benitsubasa's Pulverizer attack.
* KillSat: Matsu has full control of one. Probably one of the reasons why she holds so much influence in the Sekirei game.
* KungFuWizard [=/=] MagicKnight: Sekirei with Abilities or Elemental powers are almost always skilled fighters in their own right, combining their powers with physical attacks to devastating effect.
* LadyOfBlackMagic: Tsukiumi, Kazehana, Akitsu
* LadyOfWar: Karasuba, Kaho, Miya
* LargeHam: Hiroto Minaka, chairman of the MBI and MadScientist.
* LetsYouAndHimFight: Minaka sends an email to all the Ashikabi that a "certain group" of people were going to storm the MBI buildings. He set a new rule that anyone who stops that group from reaching the building would be exempt from his earlier rule where an Ashikabi with no wins would lose their Sekirei. Naturally this causes a lot of other people to try and stop Minato, and it appears he has no way out. Fortunately for him, a biker guy arrives late to the situation, and immediately trash talks some of them, then picks a fight with all of them.
* LightningGlare: Seo and the Ashikabi of the West.
** Tsukiumi sometimes does this with Minato's other Sekireis.
* LikeBrotherAndSister: Shiina and Kusano. It's suggested other sequential Numbers may consider each other siblings, as well.
* LimitBreak[=/=]SuperMode: All winged Sekirei have a special ability, the Norito, which can only be activated by kissing their Ashikabi and reciting their unique [[ByThePowerOfGreySkull incantation]].
* LimitedWardrobe: Justified, as each Sekirei has an assigned outfit and most don't bother with civilian clothing. [[MegaCorp MBI]] sends deliveries of replacement clothing whenever they suffer ClothingDamage in battle.
** UnlimitedWardrobe: Uzume tends to wear the same two iconic outfits, but is shown to have a near limitless collection of outfits in her closet. She lends them out to the other Izumo Inn residents.
* LoadsAndLoadsOfCharacters: To be expected, with dozen upon dozens of Sekirei, and their respective Ashibaki. This results in quite a bit of WeHardlyKnewYe, as new Sekirei are introduced and almost immediately defeated.
* LockedOutOfTheLoop: Miya goes out of her way to withhold information from Minato, to the point of subtly threatening people who try and reveal too much.
** Really, no one lets this guy know ''anything'' unless necessary...
** Matsu hasn't even felt the need to tell him his ''sister'' is playing. And that his sister has Kuu's brother.
* LoopholeAbuse: Higa pulls this in the third match of the third stage [[spoiler: bringing extra Sekirei once his three are taken out, saying it would only be a violation of the rules if they fought.]]
* LoveAtFirstSight: Common when a Sekirei meets their destined Ashikabi.
* LoveFreak: Kazehana, [[spoiler:Yume]]
* MacGuffin: The Eight Jinki.
** MineralMacGuffin: Each Jinki is a small, pearl-sized jewel encased in a larger crystal by MBI to contain their power.
* MacGuffinLocation: Kamikura Island, Kouten
* MadScientist: Minaka Hiroto, the MBI chairman
* MagicalGirlfriend: The Sekirei are essentially this to their Ashikabi.
* AMagicContractComesWithAKiss: Ashikabis wing their Sekireis with a kiss.
* MagicContractRomance: The relationship between a Sekirei and their Ashikabi is this, or at least is ''intended'' to be this.
* MakeMeWannaShout: Kuno
* MamaBear:
** Musubi when it comes to Minato. She has a bear avatar, for crying out loud!
** ''Miya''. The things it is hinted she will do if anyone actually asked for her help will send a shiver down your spine.
* ManInWhite: Minaka Hiroto, Mikogami Hayato, and Higa Izumi. It's worth noting that out of the six male antagonists of the series, the half that wear something other than white are TheDragon to one of the above men in white.
* ManipulativeBastard: Higa, and how! Blackmailing Uzume, kidnapping Yukari and messing with Shiina's head (leading him to almost rape Yukari), using Uzume and Shiina to cheat at the game, cheating at the game in general, trying to join forces with Minato (which is either very stupid, what with holding his sister captive and all, or full-on MagnificentBastard territory).
** And yet, it somehow seems a ForegoneConclusion that he'll wind up being the DiscOneFinalBoss or a BigBadWannabe, especially since Minaka has all but ordered Minato to attack his headquarters.
* ManlyTears: Minato when [[spoiler: Musubi loses her crest, effectively meaning she would be taken away.]]
* MarryThemAll: Seo and Sanada have taken this approach, while Minato has expressed his wish to be with all his Sekirei.
* MarshmallowHell: Chapter 49 of the manga. Rasserfrasserluckyb'tard...
** Musubi really likes to do this to Minato as well in the anime.
* TheMasquerade: Sekirei are a carefully-guarded company secret, and Ashikabi are warned to never reveal their involvement in the Plan. Since MBI controls most of the capital, they're able to manipulate the media and come up with cover stories to explain the strange goings-on of the Sekirei Plan to the public.
** MutualMasquerade: Minato is forced to keep Musubi's true nature a secret from everyone, and has to come up with varying excuses as his harem grows. Then.....it turns out everyone living at Izumo Inn already ''knew'' about the Sekirei Plan. Keeping the secret prevents Yukari from finding out #108 has been safely with her brother the whole time.
* MeasuringDay: The Sekirei Examination Day omake, rife with competition over bust sizes and LesYay.
* MegaCorp: MBI, also a [[LawEnforcementInc Law Enforcement Inc]] in the city.
* {{Meganekko}}: Matsu
* MegatonPunch: To be expected in any harem series. [[spoiler: And yet, Homura does this to Minato!]]
* MeetCute: How many pairs find each other.
* MissionControl: Matsu acts as this most of the time, providing Minato with intel from her computer room.
* MistreatmentInducedBetrayal: Uzume was tasked with defeating Kuno, but at the end of episode 12, [[spoiler: helps them with their plan to escape the city, along with Kazehana]].
* {{Mon}}: Sekirei are essentially a humanoid version, along with (usually) being a MagicalGirlfriend to their Ashikabi.
* MookHorrorShow: Both seasons of the anime begin with one, from the point of the view of human soldiers facing Sekirei. The second season is notable in particular, as it shows the Invasion of Kamikura Island from the point of view of the military.....then several episodes later, we see the same incident from the other side. It's a powerful reminder of how [[PersonOfMassDestruction dangerous]] the Sekirei truly are.
* MostCommonSuperpower: The majority of Sekirei are very.....stacked.
* MostWritersAreMale: Averted; the Mangaka is a woman, but the female characters are incredibly busty either way.
* {{Mukokuseki}}: The Ashikabi characters manage to avoid this for the most point, with similar facial features, black or brown hair, and dark eyes. The Sekirei ''seem'' to follow the trope, but they're aliens.
* MusclesAreMeaningless: Musubi and Benitsubasa are prime examples, though very few Sekirei look as strong as they actually are. Buff Sekirei ''do'' exist, but only one of them is a Power Type and another is a RedShirt brutally taken down by [[CuteBruiser Benitsubasa]].
* MyKungFuIsStrongerThanYours: Musubi spends a good amount of time training with Miya, and later Tsukiumi begins to join in these training sessions.
** TimeToUnlockMoreTruePotential: A combination of Miya's training, and a hefty dose of ThePowerOfLove. She notes that a Sekirei's true potential is further unlocked through the strength of their bond with their Ashikabi and the state of their emotions. Training can only do so much, if their bond isn't strong enough. [[spoiler: When Homura is winged, Musubi and Tsukiumi both manifest new abilities in response.]]
* NaginatasAreFeminine: #87 Kaho is a LadyOfWar that uses a naginata to produce RazorWind. She's noted to be exceptionally strong, and provides a backstory example of TomboyAndGirlyGirl for her childhood friend, [[TheChosenOne Musubi]].
* NamesToRunAwayFromReallyFast: The Discipline Squad seems to inspire fear in most Sekirei, although Musubi doesn't seem to realize that.
** Sekirei #00/01 [[spoiler: Miya]] is so feared that no one will normally dare venture in the northern section of the city where she lives. Considering what kind of power she showed in a flashback at the beginning of Season 2, you can't blame them. This is also the reason why Seo devises the escape plan in the northern part of the city at the end of Season 1, as there will be less MBI-affiliated Sekirei/Ashikabi there.
** The demon Ashikabi title, which was given to Yukari due to her tendency to viciously assault any Ashikabi she ran into in order to ask where Sekirei No. 108 is. This hilariously gets some Ashikabi's to run away during one fight in Stage 3 in the manga.
** The Single Numbers are the equivalent of this trope for the Sekirei, as this signifies not only that they are the eldest and therefore the most experienced.....but also that they are inherently [[BornWinner more powerful]] than their younger counterparts. The first five in particular tend to inspire OhCrap moments among other Sekirei, thanks to their status as {{Super Prototype}}s.
* NiceJobBreakingItHero: One of Seo's girls accidentally zaps him during the escape plan at the end of Season 1. This fries the cellphone he was using to communicate with Matsu. This justifies him being unable to help out the other people or give/receive updates to what's going on with the plan, and all he can do from that point is lay low.
* NoAccountingForTaste: [[spoiler: It's heavily hinted that Kazehana once was attracted to ''[[MadScientist Minaka]]'', of all people! And, if true, this would further confirm Minaka is Minato's father, as Kazehana seemed to think he was very similar in appearance to the man she first fell for.]]
* NoBiologicalSex: [[spoiler:Homura had no set gender to begin with. He asked to be adjusted to become a male, but once he began to react to Minato's presence his body took the matter into its own hands and has switched over to female while retaining his male mind.]]
* NoseBleed: Minato, obviously. Surprisingly, Yukari is also prone to this, being a {{Bishonen}} fangirl.
* NotDistractedByTheSexy: Most Sekirei are incredibly [[BuxomIsBetter well-endowed]], and tend to wear [[{{Stripperiffic}} very revealing]] outfits. It's rarely given any attention, other than the occasional gag or when a particular character directly calls attention to their looks.
* NotWhatItLooksLike: Miya often come in while Minato is in bad position.
* ObfuscatingStupidity: Kazehana doesn't take threats seriously. She doesn't need to.
* ObliviousYoungerSibling: An intresting subversion. It's against the rules to talk to {{Muggles}} about the Sekirei plan, so Minato isn't allowed to talk to his sister about it. She, however knows and is in fact a part of the Sekirei plan, but for the same reasons doesn't talk to her brother about it. Unfortunately her main reason for becoming a part of the game is to look for Kuu, her Sekirei's little sister and her brother's Sekirei, leading to a case of PoorCommunicationKills.
** Inverted later on. While Minato is still in the dark about it, Yukari has known the identity of their father for quite some time.
* OhCrap: The look on the Disciplinary Squad when Yume shows up. More so on Haihane than Beni.
** They invoke it by name earlier when Tsukiumi identifies herself as #09.
* OlderThanTheyLook: Miya.
* OlympusMons: [[spoiler: The ancient Sekirei from the other seven ships, beings so incredibly powerful that Minato's Sekirei are in awe of their strength. They may or may not have inspired some of the ancient myths, and their Ashikabi were noted to have amassed incredible authority over their homelands and fought epic wars with each other.]]
* TheOneGuy: Male Sekirei are this, by default, since males are exceptionally rare. In particular, Mutsu for both the 1st generation Discipline Squad and the South. Homura becomes this for the North, leading Mutsu to express his sympathy over having to deal with "those witches".
* OneHundredAndEight: The number of Sekirei.
* [[spoiler: OnlyMostlyDead: Uzume and the other terminated Sekirei who suffered wounds that ''should'' be fatal. It is suggested that the winner will be able to reactivate them, though Miya states that a broken bond is the equivalent of death to a Sekirei and that the Uzume they knew is gone.]]
* OnlySixFaces: Common with the Sekirei. It evens gets mentioned in-universe, as many Sekirei resemble each other.
* PaintingTheMedium: Kazehana talks to Minato with heart-shaped speech bubbles at one point. Miya swiftly forbids them.
* PantyFighter: True to the trope, most of the Sekirei (the ones who ''wear'' panties) end up with at least one PantyShot.
* PaperThinDisguise: Matsu's "disguise" while hiding from MBI in season two is nothing more than a babushka. Lampshaded by Homura.
--> Don't tell me that's your entire disguise.
* ParentalAbandonment: Apart from the missing father, Minato and Yukari's mother pretty much left them to be raised by their grandmother. [[spoiler: Turns out their mother is working for MBI, essentially as TheDragon. She seems to care more about her Sekirei "children" than her ''actual'' ones...]]
** Mikogami's parents completely [[FreudianExcuse ignored]] him in favor of their work, when they weren't shipping him off to [[OffToBoardingSchool other countries]] for acting out.
* PetitePride: Kusano, she is rather proud of her lack of assets.
* PleaseDontLeaveMe: Kuu says this to Minato, and he promises never to.
** [[LonelyRichKid Mikogami]], to Mutsu while [[CaughtTheHeartOnHisSleeve clinging to]] his scarf.
* PoorCommunicationKills: Shiina's search for Kuu wouldn't last very long if Yukari ever bothered to just go to Maison Izumo. [[JustifiedTrope Justified]] however, in that neither Yukari nor Minato knows that the other is involved in the Sekirei program, and Minaka did plainly warn Minato in the first episode (and probably every other Ashikabi as well) that if they ever reveal the Sekirei plan to a non-participant, they'd be punished severely for it. Seeing as how Minaka has eyes and ears all over the place, Minato not wanting to explain why he's suddenly living with even more women, including [[ClingyJealousGirl Tsukiume]], and Kusano, and all the other crazy stuff going on around them, it's hard to blame her entirely.
* PowerGivesYouWings: Or rather, wings give you power.
* PowerLimiter: Matsu states that one function of the adjustments was this, limiting their natural powers to a more manageable level. Homura believes this to be one reason that Akitsu was scrapped, since her power is not as limited and controlled as other Sekirei.
* ThePowerOfLove: A major theme of the series, as all Sekirei draw strength from their bond with their Ashikabi. The deeper the feelings between the two, the stronger the Sekirei can become.
* PowerTattoo: The Sekirei Crest. It appears on the base of their neck when a Sekirei is winged, and vanishes when they cease functioning. Doubles as an AchillesHeel.
* PrettyFreeloaders: Mostly avoided with Minato's harem, due to Miya requiring them to earn their keep with household chores. Mikogami's harem plays it straight, living off his family's wealth and behaving like a bunch of {{Rich Bitch}}es.
* ThePromise: Musubi and Karasuba promised to be the final two Sekirei standing, and to face each other in the final battle.
** It turns out that Minaka promised [[spoiler: Takehito that he would not involve Miya in the Sekirei Plan, allowing her to live in peace after his HeroicSacrifice]].
* PsychicLink: All Ashikabi and Sekirei share one, as part of their bond. Shiina and Kusano are also shown to have one, due to their strong telepathic abilities and bond as siblings. Ashikabi with multiple Sekirei can also act as a psychic intermediary between their partners, allowing them to combine their powers and create a CombinationAttack.
** MindLinkMates: Most pairs are this, able to sense emotions and share dreams.
* RazorWind: [[spoiler: Miya]], Yomi, Kaho.
* RealWomenDontWearDresses: Subverted. The majority of Sekirei are extremely feminine, and don't concern themselves with how feminine or masculine their peers are. Minato's harem are among the strongest Sekirei around, and very feminine whether they're kicking ass or cooking lunch.
* RedemptionEqualsDeath: [[spoiler: Poor Uzume.]]
* RedShirt: Most Sekirei are doomed to be this, because of the very [[ThereCanBeOnlyOne nature]] of the game. Higa treats his army of Sekirei as disposable {{Mooks}}, while pretty much ''any'' Sekirei that encounters the Discipline Squad is going to be MonsterMunch.
* RedStringOfFate[=/=]LoveBeforeFirstSight: The nature of the relationship between Sekirei and Ashikabi, who are [[BecauseDestinySaysSo destined]] to be together. Mikogami and Higa are both infamous for [[AbductionIsLove winging]] Sekirei against their will.
* RetiredBadAss: Miya, although in the manga it seems she may be coming out of it.
* RoaringRampageOfRevenge: A variation of this occurs in episode 10 of Season 2. At Minato's request, Matsu hacks into Higa's business accounts and essentially bankrupts his business, partly to force Higa to contact Minato, and [[spoiler: largely as payback for him being responsible for Uzume's death.]] The speed and zeal in which she does this scares Minato a little bit.
* RunningGag: Minato's harem drawn as macho, muscular men......wearing the exact same outfits. Featured in manga omakes and the first season ending as Minato's reoccurring nightmare.
** Parodied with one omake of [[StraightGay Natsuo's]] nightmare, which is the Discipline Squad dressed up as cat-girl maids all speaking to him with heart-shaped speech bubbles.
* RunOrDie: When the Black Sekirei, Karasuba decides to fight Mitsuha and Akitsu, the latter tells the former to run or she'll die. Mitsuha ignores the warning and is quickly killed while Akitsu ran away and lived.
* SacredFirstKiss: For Sekirei, being [[AMagicContractComesWithAKiss winged]] is at least the ''equivalent'' of this, if not their true first kiss. Yukari states that winging Shiina was her first kiss.
* SailorEarth: Out of the canonically established 108 Sekirei, only about half that number (58, currently) have been introduced or at least given names. There's still plenty of room for Fanon to make new Sekirei.
* SayItWithHearts: Quite a few characters. Benitsubasa is prone to saying it with STARS, including her named attacks.
* ScaryShinyGlasses: Matsu gets a chance to do this once or twice. Minaka also does this ALL the time that we rarely see his eyes through his glasses.
* ScrewDestiny: What Minato hopes to do. [[spoiler: Yukari and Shiina also do this, quitting the Sekirei Plan once they confirm that Kusano is safe.]]
* ScrewTheRulesImDoingWhatsRight: Minato does this so that the weak Kuno and her Ashikabi can flee the city. [[spoiler:This comes back to bite him later, when he is forced to fight against the Disiplinary Squad, once in the act and again in the third round as punishment.]]
* SecretKeeper: Miya appears to know a lot about the characters, but doesn't tell anyone until absolutely required, such as the existence of Sekirei, and about Kagari's true identity.
** Seo, Hikari and Hibiki, Uzume, and all of the Single Numbers except for Tsukiumi and [[spoiler: Akitsu]] are sworn to secrecy about the identity of Sekirei #01. Minaka also honors this secret, and allowed #01 to remain outside the Sekirei Plan [[spoiler: because this was Takehito's dying wish]].
** Kazehana knows about Uzume's secret, but chooses not to stop her nor will she allow anyone to harm her whenever she's around.
** Also forced upon all Ashikabi upon winging a Sekirei. They are not to tell anyone not involved in the Sekirei plan about it, under threat of retaliation from MBI should they leak the info.
* SensibleHeroesSkimpyVillains: It seems to be played straight in the first few chapters, with Musubi's outfit far more modest than Hikari and Hibiki's S&M gear outfits. However, it ends up being zigzagged like crazy the more Sekirei that are introduced -- Sanada's Sekirei have some of the smallest outfits around, but are cheerful and kind-hearted. Meanwhile, some of the most modestly dressed Sekirei are AxCrazy villains.
* SensitiveGuyAndManlyMan: Minato and Kagari are a twist on this, in a way. Minato is definitely the sensitive one of the pair, while Kagari is a {{Badass}} and a Ladies' Man [[spoiler: until his gender begins to change]]. Even so, Minato states that he considers Kagari's a "cool guy" that he deeply admires. Mikogami and Mutsu are a villanous example, as well.
* SexySantaDress: Several pieces of art feature Minato's Sekirei, as well as Hikari and Hibiki, in these. Parodied with [[spoiler: Homura]], who tells the audience to not be disappointed that the outfit has pants instead of a miniskirt.
* SheFu: Extremely common among Sekirei.
* [[ShootTheMedicFirst Shoot The Ashikabi First]]: Attacking an Ashikabi is strictly prohibited by MBI, [[spoiler: because their death will terminate all their Sekirei]]. Higa's Sekirei seem to make it a standard policy to target enemy Ashikabi if the battle is going poorly. Oriha, in particular, makes multiple attempts on the lives of other Ashikabi during the 3rd Match.
* ShoutOut:
** Minaka's explorer outfit is flat-out a KamenRider costume.
** The 2nd episode of season 2 finally acknowledges that Sekirei is {{Pokemon}} [[FanNickname with tits]] when Minato says the famous CatchPhrase: Kazehana getto daze! Kazehana even says that Minato is in the wrong show.
*** And in the next episode you have to fight off the urge to shout "... Blasting off again!"
** In the first episode, when Musubi is cooking dinner for Minato, you can hear her humming the [[FinalFantasy Chocobo theme]]. This is only in the English dub, though.
*** And in the second episode of the English dub, Musubi hums another [[{{Freakazoid}} particularly catchy tune]] in the shower.
*** In the third episode (English dub again), Musubi hums what sounds like the opening theme for pre-Disney {{Doug}}.
** Sanada complains that because they have [[ShockAndAwe thunder]] powers, Hikari and Hibiki should be wearing [[UruseiYatsura tiger-striped bikinis]].
* ShroudedInMyth: All the major Ashikabi, as well as the first generation (#01 - #05) have various myths surrounding them. The myths surrounding [[DepravedBisexual Minato]] and [[DomesticAbuser Seo]], in particular, are hilariously off the mark.
* SittingOnTheRoof: Kazehana hangs out on the roof frequently, but it seems to be a common place for the residents of Izumo Inn to go.
* SingleWomanSeeksGoodMan: A majority of the Ashikabi are sweet, normal guys. Minato, in particular, manages to win over each of his Sekirei through his kind heart.
* SkinshipGrope: Goes with the whole fanservice thing.
* SlasherSmile: Several characters, but Yukari takes the cake.
* SlaveBrand: The Crest all Sekirei receive when winged by their master is a benign version of this.
* SlaveRace: The Sekirei are under the control of [[MegaCorp MBI]], and it was [[spoiler: Takehito's]] goal to set them free.
* SneezeCut
* SnowMeansLove: Haruka and Kuno met on a snowy day, when he saw her shivering in the cold and took pity on her. Mikogami and Mutsu [[HoYay may also]] count.
* SoProudOfYou: In the manga, after Minato refuses to back down from a confrontation with Takami, she states as his mother she's so proud of the man he's becoming. [[spoiler: .......then she breaks out the SlasherSmile and sics MBI soldiers on him anyway.]]
* SplitPersonality: [[spoiler:Musubi. Sekirei No. 8, Yume, is inside of her. Yume is a love-crazy [[KamehameHadoken beam-user]] type, but while Musubi knows she has Yume's soul inside of her, she remembers nothing she's done ''as'' Yume.]]
* StandardFemaleGrabArea: Minato seemingly knows how to do this properly, though it usually makes whoever he did it to call him a pervert.
** That's because in the manga at least, he grabbed Yomi round the middle and copped a feel.
** Played deadly straight with Seo, since when he is touching a sekirei, he effectively neutralizes their power until he lets go.
* SubmissiveBadass: Many Sekirei are this, deferring to their Ashikabi and calling them "Master", and even tolerating mistreatment from [[PunyEarthlings guys]] they could toss around with little effort.
* SugarAndIcePersonality: The Southern Sekirei, Akitsu and Mutsu, who both turn out to be reserved by kind-hearted {{Anti Villain}}s.
* SuperDeformed: During it's moments of humor the anime will often switch to this style for short periods of time.
* SuperPowerMeltdown: Often happens to Homura.
* SuperPrototype: Numbers 01 - 05 are this, having been given special adjustments that drastically increased their power. With the possible exception of Matsu, each of them is a OneManArmy and the reason other Sekirei fear the Single Numbers so much.
* [[spoiler: TakeCareOfTheKids]]: [[spoiler: Before she dies, Uzume's last request of Minato is to protect Chiho for her.]]
* SwordFight: In the penultimate episode of the 2nd season, there is a brief duel between Karasuba and Mutsu. She's bored waiting until she can confront Musubi, and figures he'll be able to keep her amused for a while. In the end, she decides she's had enough fun and wanders away, leaving Mutsu to make a hasty [[KnowWhenToFoldEm retreat]].
* TeamMom: Miya Asama, landlady of Izumo Inn. Though, she will become angry if called this; she thinks of herself as more of a CoolBigSis
* TechnicalPacifist: Minato is a [[NonActionGuy frail]] peace-loving guy who is uncomfortable with having his Sekirei or anybody else fight and wishes he could avoid conflict as much as possible. That said, it doesn't take much for something to get him to voluntarily join or even start a fight [[BigDamnHeroes to help somebody else]].
** {{Lampshaded}} in Minato's first Stage Three duel, when his strategy to minimize fighting consists largely of [[TrashTheSet Demolish the surrounding area]] and beat up everyone before the dust settles. Homura notes that for something Minato came up with to avoid conflict, it sure included a lot of wanton destruction.
* {{Technopath}}: Matsu has the ability to look into any computer system with her mind [[spoiler:and even hacks into and spys through MBI's sattelites at various points. This has caused her to be labelled "The Sneaking Sekirei" a title she doesn't appreciate]].
* {{Telepathy}}: All Sekirei have it, to one degree or another. Kusano is stated to have particular strong abilities, which allowed her to call out to Minato.
* TemptingFate: After Minato nods off in the bath in episode 1 of Season 2, Musubi calls him for dinner, then decides to get in the bath with him. After he wakes up, he comments that it would be bad if the other girls saw them like that. Cue [[ClingyJealousGirl Tsukiumi and Kusano]] opening the door to the bath...
* ThemedHarem: HumanAlien MagicalGirlfriend {{Action Girl}}s with enormous breasts.
* TheOnlyOneAllowedToDefeatYou: [[{{Tsundere}} Tsukiumi]] uses it on Minato as a threat. Played straight with Karasuba defeating Musubi, who stops herself from fighting [[spoiler: Yume]] at the end of episode 12 in Season 1 after she comments that Musubi needs to train more if Beni beat her.
* TheReasonYouSuckSpeech: Kuu berates Tsukiumi for not wanting to help with Minato's plan to help Kuno escape with Haruka. Miya later helps snap her out of her refusal to help.
** Musubi and Minato essentially tells this to the Ashikabi and Sekirei who confront them in Season 2 and ask for his participation in escaping, after the latter Ashikabi continually insults Haruka and Kuno as being weak and pathetic.
** Mikogami delivers one to Higa, when the South [[EnemyMine shows up]] to help defend Maison Izumo. His accurate assessment of Higa's jealousy towards Minato for overcoming the restraints of his family and society, as well as the threat of all out war between the South and East, force Higa to back down.
* ThereCanBeOnlyOne: The whole point of the Sekirei plan.
* TheUnreveal: Seriously, is there anyone (other than Minato) who doesn't know [[spoiler: Miya]] is Sekirei No. 1? If you couldn't already guess it, the beginning of episode 1 in Season 2 gives it away, but it's still kept as a huge secret/surprise in-universe. In the Manga, it's not as readily apparent because of the pacing, but once Sekirei with numbers begin appearing in mass and the background info picks up, it's not a difficult concept.
* ThirdPersonPerson: Musubi, Matsu.
* ThisIsUnforgivable: Minato states that he won't forgive anyone that treats Sekirei like tools, or mocks the struggles of weaker, loving pairs like Haruka and Kuno.
** ItsPersonal: Higa in particular becomes the focus of Minato's wrath, when his manipulation of Uzume is revealed and [[spoiler: she performs a HeroicSacrifice]]. From then on, he starts fighting to ''win'' and reminds people that's a good idea to BewareTheNiceOnes.
* ThoseTwoBadGuys: Benitsubasa and Haihane once they make more regular appearance, though occasionally joined by Karasuba.
** Hikari and Hibiki, in their first two appearances.
** Mikogami and Mutsu, occasionally joined by Akitsu as a bystander to their conversations.
** Toyotama and Ichiya, who double as Higa's BodyguardBabes.
* TomboyAndGirlyGirl:
** Musubi and Tsukiumi
** Uzume and Chiho, in a romantic example
** Haihane and Benitsubasa, mostly because the former is completely unconcerned with her appearance while the later wears a cute flower hairclip and moons over her gay Ashikabi.
* TrainingFromHell: Miya can be a pretty harsh mentor, as shown the first time Tsukiumi attempts to train with her. She's left battered, bruised, with her [[ClothingDamage clothing shredded]] and barely standing. Musubi, being a SpiritedCompetitor, loves every minute of it.
* TranquilFury: Miya, Yume.
* {{Troll}}: Takami, Minato's mother, of all people, does this in episode 3 of Season 2. After Tsukiumi starts talking to her in the hospital, his mother tells her that she should be addressing her as "mother" (due to Tsukiumi's "marriage" to Minato), while making the same scary face Yukari does (minus the red eyes). Tsukiumi immediately apologizes and calls her that, only to have Takumi nonchalantly says she wasn't serious about it, which ticks off Tsukiumi.
* TruceZone: There are several within the capital, primarily areas owned and operated by MBI. This allows the company to perform monthly examinations on the Sekirei and keep the peace during a game of ThereCanBeOnlyOne. The Northern portion of the city is considered this to a degree, as most Sekirei are too frightened of the legendary [[TheDreaded Hannya of the North]] to dare causing trouble in her territory. Miya ''strictly'' enforces a "no fighting" rule within Izumo Inn, which the smart people respect.
* TrueCompanions: After Karasuba defeats Musubi at the end of episode 12 in Season 2, the rest of Minato's harem move in to protect her. Karasuba taunts them that they still wouldn't be able to defeat her, but ultimately lets them go, either because she knew they saw through her bluff, or perhaps she wants Musubi to get stronger for more of a challenge.
** Shown even earlier in Episode 8 of Season 1: Despite Musubi and Tsukumi constantly fighting one who Minato's "true wife" is, they agree - through "a most secret exchange" - that they trust to each have the other's back, with Tsukumi actually calling Musubi "friend."
* {{Tsundere}}: Tsukiumi, Hikari. [[spoiler: Later on, Homura towards Minato as well; albeit a bit more subtly than the first two examples. Homura [[MegatonPunch punches]] him in the face right after getting all blushy and dere, for crying out loud.]]
* TwentyMinutesIntoTheFuture: 2020, which really doesn't seem ''that'' different from today. Then again, take a look into the world today: There's still ten years to go yes, but is there really that much differnce?
* TwinkleInTheSky: [[spoiler: Yume]] did this to Benitsubasa and Haihane at the end of first season (by throwing them instead of MegatonPunch). Repeated later by Kazehana.
* TykeBomb: The Sekirei are an entire species of tyke bombs, raised by [[MegaCorp MBI]] and aimed primarily at each other.
* UnwantedHarem: Subverted; while at first Minato's reluctant and unwilling to take responsiblity, he eventually goes after four of his eventual [[spoiler:six]] Sekirei.
* VictoriasSecretCompartment: Matsu pulls a tracking device out of her cleavage in chapter 62
** She also pulls out a gun that shoots a net while in the bathroom with Minato. He immediately [[LampshadeHanging asks where the heck she pulled that out from.]]
* VillainousBreakdown: [[spoiler: Higa is showing the first symptoms]].
* WeHaveReserves: Higa treats his Sekirei this way, which comes back to bite him since he does ''not'' in fact have reserves. Out of his original dozen Sekirei, he's down to his last ''three'' and things do not look good for him, since [[spoiler: his potential opponents in the 4th Stage each have a founding member of the Discipline Squad in their ranks.]]
* WeaponOfChoice: Weapon users are a common type of Sekirei, as are the Power types that use their [[BareFistedMonk fists]] or [[KickChick feet]].
** AnAxeToGrind: Namiji
** BareFistedMonk: Musubi, [[spoiler: Yume]], Benitsubasa, Amebane
** BladeOnAStick: Kaho
** ClothingCombat: [[spoiler: Uzume]], Shijime
** DropTheHammer: Yashima
** KatanasAreJustBetter: [[spoiler: Miya]], Karasuba, Mutsu
** KickChick: Katsuragi, Ichiya
** KnifeNut: Sai. Common of [[RedShirt unnamed]] Sekirei as well.
** OddlyShapedSword: Himeko
** RazorFloss: Mitsuki
** RingsOfDeath: Oriha
** SimpleStaff: Toyotama
** SinisterScythe: Yomi
** WhipItGood: Mitsuha
** WolverineClaws: Haihane
* WeirdMoon
* WhamEpisode:
** Played with when Matsu [[spoiler: declares her intent to leave the inn. Minato and the viewers were surprised; the rest of Minato's Sekirei were somewhere between DullSurprise and out right disbelief.]]
** [[spoiler: Uzume's death]].
** The truth about the Sekirei, as told by [[spoiler:Miya.]] It really has to be seen to be believed.
* WhatKindOfLamePowerIsHeartAnyway: Kuno's sole weapon is her voice. It stuns targets but doesn't hurt them. If she does it too long, she [[BloodFromTheMouth throws up blood]] when finished.
** HeartIsAnAwesomePower: The singing stops the two discipline squad members long enough for Tsukiumi to arrive.
* WhatMeasureIsANonHuman: One of the undertones of the series. Minato treats his Sekirei as normal people, while most Ashikabi treat them as things.
** Which makes it all the more painful to watch other Ashikabi who did clearly treat their Sekirei's as people as well, and then having them get defeated by another who probably didn't want to fight them in the first place if not for Minaka's constant rule changing.
* WhenItAllBegan: [[spoiler: Miya]] provides insight into several key events that shaped the current situation.
** [[spoiler: The great battles between the Sekirei from the other 7 ships and their Ashikabi. The survivors of these battles are the ancestors of modern Ashikabi.]]
** The discovery of Kamikura Island by Minaka and Takami, which resulted in the formation of MBI and the awakening of the Sekirei.
** The first Invasion of Kamikura Island. [[spoiler: This final event resulted in not only the formation of the original Discipline Squad, but inspired Minaka to change the S-Plan from a research project focused on the study and protection of the Sekirei to the current Sekirei Plan.]]
** Another significant event, of course, was [[spoiler: the kidnapping of Musubi as a child, which resulted in Yume giving the damaged fledgling her core]].
* WhiteShirtOfDeath: [[spoiler: Uzume, in the manga. Minato, also wearing a white shirt at the time, ends up completely covered in her blood.]]
* WholesomeCrossdresser: Yukari puts Shiina in a dress to hide him from pursuers, fortunately he is so bishounen that he looks like a girl.
* WifeBasherBasher: Yukari and Shiina become infamous as a result of their dispatching abusive pairs. Doubles as LaserGuidedKarma, since Yukari is fond of [[GroinAttack stomping on their balls]] to finish things off. Amebane learns just ''why'' abusing his Ashikabi in front of Shiina is a [[BewareTheNiceOnes is a very bad idea]].
* WomanInBlack: Karasuba. [[spoiler: Miya]], Matsu, Kazehana, and [[spoiler: Yume]] were also this, during their time on the Discipline Squad.
* WomanInWhite: Akitsu, The Veiled Sekirei [[spoiler: Uzume]], Taki.
* WorldOfActionGirls: Sekirei are ''incredibly'' gender-skewed, with only 4 known males out of the 108. [[spoiler: And one of those ends up as a hermaphrodite.]] Most Ashikabi are [[NonActionGuy Non-Action Guys]], and the rules of the game actually prohibit them from being involved in combat.
* WorldOfBuxom
* WouldHitAGirl: Played with in both directions. Since most of the Sekirei are female, the few males have absolutely no issue with fighting them seriously. Evil characters, such as Junichi and Amebane, are also shown to consider hitting women for [[DomesticAbuser annoying]] them to be perfectly acceptable. Both get what's coming to them courtesy of Yukari and Shiina.
* XMeetsY: ''{{Pokemon}}'' meets ''Franchise/{{Highlander}}'', [[RunningGag With tits!]]
* {{Yandere}}: Matsu in episode 4. She has a KillSat try to take out Musubi.
* YaoiGuys: Mikogami and Mutsu [[HoYay may be this]].
** TokenYuriGirls: Uzume and Chiho.
* YinYangBomb: [[spoiler: Tsukiumi and Homura combine their attacks into a giant steam dragon. It's said that this can only be done with Sekirei with a shared Ashikabi, or at least a very high synchronisation.]]
* YouAllLookFamiliar: The male characters in particular all look relatively alike (along with spiky-haired female characters). Invoked, as quite a few Sekirei with sequential Numbers look nearly identical and have similar powers.
* YouAreNumberSix: The Sekirei, numbering from #01 - #108. Numbers 01 - 09 are known as the "Single Numbers", and considered the most powerful.
* YouGottaHaveBlueHair: Sekirei are the only ones (with the exception of MBI scientists) to have unusual hair colors. While the majority have brown or blonde hair, white is also quite common, with the occasional pink, [[PurpleIsPowerful purple]], or green.
* YoungerThanTheyLook: The Sekirei were discovered 21 years prior to the series, when all but #01 were either infants or fertilized eggs. Numbers 01 - 05 have been shown to have been [[TheAgeless adults when the others were still infants]], but how quickly Sekirei actually reach physical maturity is unclear. Either way, it's easy to forget that they are all younger than Minato.
* YeOldeButcheredeEnglishe: Tsukiumi in the english version of the anime.
* ZettaiRyouiki: Many of the girls. Just look at the page pic.
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