[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/Chrome_Shelled_Regios_1453.jpg]]
''Chrome Shelled Regios'' is set on Earth AfterTheEnd. There the remaining population survives inside domed, mobile, cities called ''Regios''. These are needed to protect from the horribly polluted atmosphere and giant man-eating ''Filth Monsters''.

The series protagonist Layfon Alseif, arrives at the academy city of Zuellni with the intent to leave his past behind him and start over as a general studies student. However, he demonstrates his true abilities saving a girl who got caught up in the destruction of a fight between two military arts students. Despite not wanting to fight he is forced into the military arts department which is used for defense of the city as well as competing in intercity matches for valuable resources.

A series of LightNovels that has 4 (Yes, '''4!''') {{Manga}} adaptations, 2 novel spin-offs (a prequel and a sidestory) and an {{Anime}} adaption.
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!!! "Trope Shelled Regios":
* AbsurdlyPowerfulStudentCouncil - The StudentCouncilPresident is effectively in charge of the entire city, including its defense against the HordeOfAlienLocusts
** An example of just how absurdly powerful he is, is when he makes a phone call, and has his assistant hold the phone up to his head, for no reason other than he can.
* TheAce - Layfon.
* ActionGirl - Nina, Dalsheena, Synola
* AfterTheEnd - Earth. [[spoiler: Ironically it became the way it is after the UN tired to solve Earth's Energy Crisis due to WorldWarIII.]]
* AllThereInTheManual - Reading the novels and manga can help you understand the series setting and its TechnoBabble.
* AppliedPhlebotinum - Selenium. Also, each Regios is run by an electronic fairy.
* TheAtoner - Layfon Alseif
* AuthorityEqualsAsskicking - Nina in the mangas and novels. Which is the reason why she was made the youngest Platoon Captain and leads...
* BadassCrew - The 17th Platoon of Zuellni.
* BadassLongcoat - Sharnid during his days in the tenth platoon, and briefly again in episode 14.
** In the Legend of Regios sequences the gun man certainly has this going on.
* BadassNormal: Sharnid is the only fighter in the platoon who doesn't have special K.
* BeachEpisode - Even though they're actually at a [[PoolScene pool]] it's a [[SmashingWatermelons Watermelon Smashing]] away from it not making a difference.
* BattleAura - ColorCodedForYourConvenience!
** Though the colors have little to do with the personality or alignment of the characters.
* BilingualBonus - Attempted, unfortunately [[BlindIdiotTranslation it didn't quite work]]....
** Not in the sense that what is actually being said is bad, though; it's the way they pronounce it, mainly. (Though some of the acting does seem to be getting slightly better over time.)
* BloodKnight - Some members of the Heavens Blades just love to fight especially the Queen herself.
* TheCasanova - Sharnid
* CatGirl - How Shante acts sometimes. Even her helmet has cat ears!
** It's more like Monkey Girl. Her character looks like it's based off either the Monkey King or Nezha, both from Chinese mythology, or a mix of the two.
* ChronicHeroSyndrome: Despite his denials and simply wanting to live a normal life, Layfon is this. [[spoiler:He ends up WalkingTheEarth at the end of the series, helping people wherever he goes.]]
* CrouchingMoronHiddenBadass - Layfon may look like a weak nice guy but if you ever harm his friends and those he cares, get ready for a painful ass kicking!
* CursedWithAwesome - both Felli and Layfon have... mixed feelings about their superpowers
* LittleMissSnarker - Felli Loss.
* DetachedSleeves: Nina wears these sometimes.
* DistressedDamsel - Leerin.
* DualWielding - Nina.
* {{Elopement}}: [[spoiler:Happens to Layfon and Felli at the end of the series, with Layfon asking Felli to WalkingTheEarth with him. Hillariously, Layfon had no idea what he was asking her to do until she tells him.]]
* ExpositionBreak - Scenes occuring in Grendan (Layfon's hometown) largely amount to this. The ''Legend of Regios'' sequences (See BlindIdiotTranslation and GratuitousEnglish).
* EmotionlessGirl - Felli, as a psychokinetic she can't feel emotions the same way as others.
* FirstKiss - Layfon and Leerin had their first kiss with each other after Layfon left Grendan.
** [[spoiler:Nina]] has her first kiss with [[spoiler:Layfon.]]
* FirstNameBasis - Felli and "Fon-Fon"
* GenkiGirl - Mifi
* GratuitousEnglish - most episodes of the anime have a scene (An ExpositionBreak entitled "Legend of Regios", which establishes how TheEndOfTheWorldAsWeKnowIt came about) entirely in English.
** The English grammar is actually correct... it's just the pronunciation is horrible
* GreenAesop - Let's see, air so polluted you need protective gear to go outside, "Filth" Monsters, I wonder...
* GunsAkimbo[=/=]GunKata - Sharnid, who says that there are two kinds of people who use this style -- the truly skilled and the idiots. He considers himself one of the idiots.
* HardDrinkingPartyGirl - Synola
* HeroicBSOD: Layfon is in one at the beginning of the story. [[spoiler: He gets better.]]
* HordeOfAlienLocusts - The filth monsters can consume pollutants but humans are the preferred option.
* IDidWhatIHadToDo - [[spoiler: Layfon's justification for participating in underground matches and attempting to kill the person who was blackmailing him in a Heaven's Blade selection match. Thankfully Nina was able understand and forgive Layfon on what he did. The anime on the other hand she forgave him by the next episodes end.]]
* IJustWantToBeNormal - Layfon
* IWantMyBelovedToBeHappy: [[spoiler:In the end, Felli knows that due to his ChronicHeroSyndrome, Layfon will never stay in one place for very long, and will be WalkingTheEarth helping people and doing what he feels is right. Despite being saddened that he will leave, she accepts this having fallen for him because of this. Layfon ends up TakingAThirdOption, and asks Felli to go with him, and together they depart in secret.]]
* IceQueen - Felli Loss, lampshaded by the fear normal girls have of her.
* {{Invocation}} - "Restoration!", also used as an OnTheNextEpisodeOfCatchphrase.
* ImpracticallyFancyOutfit - The suit meant to protect you in battle and stop the poisonous air from killing you? Yeah, Felli's has a frilly skirt.
* {{Kaiju}} - The Filth Monsters.
* KatanasAreJustBetter - Played straight and subverted. Almost every single character used a weapon other than a katana, and they aren't really being shown as inferior to those (few) that do use katanas. However, the protagonist, Layfon Alseif, who has been using a standard sword the entirety of the series, gets a big scene after [[spoiler: fusing two different kinds of {{Infinity Plus One Sword}}s together]]. Partially justified in that all of his training focused on katana-using, and it was just a [[spoiler: personal vow of [[TheAtoner repentance]]]] that kept him from using it the whole time.
* [[spoiler:KingIncognito]] - [[spoiler:Synola]]
* LadyOfWar - Siena.
* MaidOfMoe and when that doesn't work well, [[FrenchMaid Maid of Sexy]] - Felli Loss
* MamaBear - [[spoiler:Synola to Leerin.]]
* MrFanservice: Admit it ladies, Layfon is just that good looking.
* OfficialCouple: [[spoiler:Layfon and Felli in the light novels.]]
* {{Ojou}} - Felli Loss
* OjouRinglets - Siena.
* OlderThanTheyLook - [[spoiler:Shante]] is actually 20 years old! [[spoiler:Queen Synola]] is more older than she looks but just don't mention that to her if you value your life.
* PowerGlows - The Kei used by the military artists.
* PowerIncontinence - Felli's PsychicPowers apparently experience a leak every so often.
** Nina in the anime when she gets possessed by the electronic spirit.
* PrivateMilitaryContractors - The Salinvan Guidance Mercenary Gang.
* PsychicPowers - Psychometers are people whose Kei has essentially given them these.
* RapunzelHair: Felli and Siena.
* RebelliousPrincess - [[spoiler: Nina is actually the heir to the city of Sheniebel. But she felt her freedom was restricted by her parents since she [[RoyalsWhoActuallyDoSomething wanted to do more to protect people]] rather than just being the next heir. When her parents wouldn't allow her freedom, she ran away from home to study at Zuellni which her parents in turn disown her.]]
* RoyalsWhoActuallyDoSomething - Queen Alsheyra enjoys fighting Filth monster [[BloodKnight very, very much.]] Also played straight for [[spoiler: Nina]]
* SempaiKohai - Felli is Layfon's sempai, but she hates being called that.
* SeriousBusiness - Conflicts between cities are settled with games of what very strongly resembles capture the flag, which decides whether the opposing cities get to keep the other city's Selenium mines (the source of energy for the cities) or not.
** It's also only the Academy Cities that have the capture the flag rules- to hold down the body count. It's implied other city types are more... unrestrained in fighting.
** Kei users. Justified since its their powers that help the Regios fight against the Filth Monster and against each other. They are so important, criminals take advantage of these matters by [[DrugsAreBad selling special drugs]] to Kei users to improve their powers and worse cases [[spoiler:[[KickTheDog they kidnap children of Kei users and sell them to other cities.]]]]
* ShipTease - Layfon and Nina. Layfon and Mayshen. Layfon and Felli. Layfon and Leerin.
** One of the manga adaptations, Missing Mail, teases Lafon and Felli [[UpToEleven so very very much.]]
* ShowWithinAShow - The ''Legend of Regios'' segments occasionally end with various members of the cast complaining about the abrupt cut-off and whating to know what happens next.
* SleepCute: Harley Sutton falls asleep on Layfon's shoulder on a bus trip. Nina looked like she wanted to strangle something or someone.
* SmugSnake: Haia, so much.
* SpoilerOpening - Points out the members of the eventual group of TrueCompanions.
* SugarAndIcePersonality - Felli Loss, Even Lampshaded in the MaidCafe episode
* SupernaturalAid - With a bit of a twist as [[spoiler:Layfon has lost his Heaven's Blade]], the anime then plays it straight [[spoiler:when it is returned and combined with his katana.]]
* TakehitoKoyasu - Karian Loss, Student Council President and Felli's older brother.
* ThanksForTheMammary - A funny version where the female doesn't punch the guy. Layfon and Naruki have a sparring match where he accidentally falls on top of her. Of course he touches her boobs. Naruki is not angry about it but she is annoyed that Layfon didn't realize he was feeling her big breasts as if they were flat in the first place!
* TomboyAndGirlyGirl - Naruki and Mayshen
* {{Tsundere}} - Nina.
** Also, Felli- that's right an [[EmotionlessGirl Emotionally Repressed]] {{Ojou}} {{Tsundere}}
* UnwantedHarem - Layfon, you are one lucky man. You managed to catch the hearts of [[DefrostingIceQueen Felli]], [[{{Tsundere}} Nina]], [[ShyBlueHairedGirl Mayshen]] and [[UnluckyChildhoodFriend Leerin]]. Surprisingly, [[spoiler: he does have feeling for all of them.]]
* WalkingTheEarth: [[spoiler:Felli believes that Layfon is destined to do this at the end of the series. Felli ends up going with him upon Layfon's request.]]
* WaveMotionGun - The kei-ra cannon. Apparently it either fires a laser that turns into a sphere that explodes, or a beam that splits thing in two.
* WhatTheHellHero - [[spoiler: Nina to Layfon after she finds out why he left Grendan]]
* ZettaiRyouiki: Nina and Felli.
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