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Koutarou Satomi decided to mark starting high school by living independently, and chose Room 106 at Corona House because the rent and fees were cheap.

After a fall at an archaeological dig where he meets a mysterious figure in an underground cavern and wakes up with a concussion, Koutarou discovers Room 106 is now a Weirdness Magnet which has attracted five "invaders":

Their initial fight over who gets the room gets them smacked down hard by Koutarou's landlady, forcing them to live together peacefully while they sort the whole thing out.

Rokujyouma no Shinryakusha!? (lit. Invaders of the Six-Tatami Mat Room!?) is a harem comedy light novel series written by Takehaya and illustrated by Poco, consisting of 30 volumesnote  as of February 2018. It has been localized into English by J-Novel Club under the title Invaders of the Rokujouma!?, and can be purchased online from Bookwalker. Much of the series (minus some of the illustrations) is also available for free indefinitely on J-Novel's own site, due to being based on a Fan Translation which the translator had released prior to being hired.

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The series received an Animated Adaptation in summer 2014, which covers the first six volumes over twelve episodes. It can be viewed on Crunchyroll under the title INVADERS of the ROKUJYOMA!? by people living in the following areas: note 

There is also an online manga adaptation running in Comic Dangan, and an Audio Play based on the events of volumes 7.5 and 8.5.


Tropes:

  • Adaptational Dye Job: A rather odd case. The illustrator Poco changes Sanae’s hair color after Volume 1 (from purple to orange) and gives the others a lighter shade (compare Koutarou's design from the Volume 1 cover to the latest one). The anime, however, follows the Volume 1’s design.
  • A Day in the Limelight:
    • Yurika gets some focus in episodes 3, 8, and 9.
    • Sanae in episodes 4 and 5. The first part of the Light Novel analogue, Volume 3, has some focus on Ruth as well.
    • Theiamillis in episodes 6 and 7.
    • Kiriha's arc starts in episode 10 and finishes off in 11.
  • Alien Invasion: An extremely downplayed one occurs with Theia. Since rather than the entire Earth, she wants to invade the titular rokujyouma note  but for a reason.
    • A more light-hearted from the Forthorthens happens in Volume 27. But they merely want to exchange culture with Japan and their Blue Knight (Koutarou) to return.
  • Aliens Speaking English: Or in this case, Japanese. Though this is explained in the novel (they have a translation device that translates any language automatically, though it needs to analyze it first}.
  • All Girls Want Bad Boys: In episode 10, after Koutarou, playing a villain in the kid's show, "kidnaps" Harumi from the audience, and pushes her "boyfriend" Kenji away, he summons his horse, played by Yurika, and tells Harumi he's going to take her away to their wedding. Harumi's character is probably supposed to be against it, but instead seems happy. Two little girls in the audience spot this, and immediately mention this trope.
  • Alliterative Name: Kiriha Kurano.
  • Always in Class One: Our protagonist is in class 1-A to start off. Everyone transfers in in episode 2.
  • Amusing Injuries: Yurika has a large bump on her head after crashing into Koutarou's room. Sanae also sports one at the next episode preview at the end of the first episode.
  • Arbitrary Skepticism: Ghosts, Aliens, and Subterranean Invaders, fine. But Koutarou refuses to believe that Yurika is an actual Magical Girl. Though unlike the other three, Yurika hasn't exactly shown him any proof.
    • That changes when he does see her use her magic. Except at the end of the fight the evil magical girl erases everyone's memories. Afterwards, he does not believe her, but does not disbelieve either.
      • In fact, in the novels he has seen her using magic during Kiriha and Theia's fight in volume one, but it didn't register. Later, he finds out magic is real and even gives her a magical staff that lets anyone use magic saying "now your dream has come true", but still refuses to believe that she was a real magical girl from the start. He admits after finding about the truth the first time (before forgetting) that he does not believe her because he wants to believe that she's her fellow "normal human".
  • Aren't You Going to Ravish Me?: Ruth actually got that Koutarou was dreaming when he accidentally grabbed her in episode 4. What pisses her off is that he was chasing a beetle in the dream, and only grabbed her because he was climbing a tree to get at it.
  • Artifact Title: While the four (six if we include Ruth and later Maki) girls were introduced as tryng to conquer the titular rokujōma, it gets lost later on in the series. Though the title ‘invader’ still sticks since rather than invading the room, the (9) girls try to invade (Koutarou’s) heart.
  • The Assimilator: The ghost lady turns into a giant ghost creature when Koutarou and the other girls show up to rescue Sanae in episode 5. She then grabs Sanae and absorbs her as well, though fortunately Koutarou is able to separate the two before Sanae was taken away completely.
  • A Truce While We Gawk: Sanae's and Koutarou's battle gets interrupted by Yurika crashing into the room. Both of them are then turned off from their fight by how pathetic Yurika seems to be, particularly when she's crying outside after being kicked out.
  • Attack Drone: Theia can deploy meter-long unmanned fighters from Blue Knight. Korama and Kurama can act as these for Kiriha if necessary.
  • Attack of the 50-Foot Whatever: Jack-o, the giant robot being used by Tayuma in episode 11 in an attempt to invade the surface.
  • Ax-Crazy: Tayuma develops this look as his plans gradually get foiled by Koutarou and the others.
  • Badass Normal: Shizuka, Koutarou's landlady, is capable of beating up all of her superpowered "guests" if they step out of line. Yes, including Sanae.
    • While not as much, Koutarou and Ruth also qualify since they are Master Swordsmans
  • Balanced Harem: Lamp Shaded and Discussed twice.
    • First in Volume 14 short story Yurika's Stand By Me when Makenzie calls out Koutarou as being needing to pick one girl to pursue and suggests he score the girls based on general qualities and eventful memories (50 points means they are Just Friends, 75 is a potential girlfriend, 100 indicates Marry)). He starts with Yurika who scores 302 and realizes all the Girls would score the same.
    • In Volume 23 Makenzie tells Koutarou again that he's going to have to pick one and recommends he rank their importance to him and start drooping the girls on the bottom of the list.
  • Battle Aura: Fear Shizuka's. Theia proves able to manifest one as well.
  • Battle Harem: Oh So Very Much, starting in volume ten and progressing through the later volumes, by which time all the girls are pretty tight. Do NOT piss these Ladies Off!
  • Beach Episode: Episode 4 (volume 3) has Koutaru and the Invaders go to the beach. They go back to the same beach in Volume 17 with Harumi, Clan, Maki, Makenzie and the Cosplay club. Includes a Test Of Courage.
  • Beam Spam: Theiamillis has her ship orbiting above Earth fire some small laser beams at Maki in episode 9. She manages to survive only by channeling the power in room 106 as a shield against it.
  • Because You Were Nice to Me:
    • Koutarou considers Kiriha's request to leave the room, solely because she asked him very nicely. Contrast that to Sanae, who at first tries to spook him out, and when he sleeps through that, she attacks him, hence his resistance to her demand he leave. Only after she reveals the second part of her plan, to conquer Earth, does he then object.
    • Harumi's interactions with Yurika were always helpful and encouraging to the latter, so when the former collapses during the race, she uses her magical powers to heal her.
  • Beneath the Earth: Where Kiriha's people live.
  • Berserk Button: Rhinoceros Beetles for Ruth after the beach incident in episode 4. After finding that Yurika was taking care of one. She went ballistic. Even harmless candy that vaguely resembles beetles is enough to drive her angry.
    • Note that this is specifically directed at Rhinoceros beetles and only Rhinoceros beetles. Oddly enough, she didn't have a problem when an actual rhinoceros beetle was in front of her until she figured out that's what it was.
  • Beware the Nice Ones: Shizuka is a sweet girl until you mess with her dorm. Ruth is also a kind person until you put a rhinoceros beetle in front of her.
  • BFG:
    • Theiamillis sports two of them, which show up over her shoulders when she summons them.
    • Clan, Theiamillis' rival, sports a rather large one as well in episode 7.
  • BFS: Koutarou uses one in episode 9.
  • Big Breast Pride: Kiriha loves to flaunt her ample cleavage around, particularly when Theiamillis is around.
  • Big Damn Heroes: Used a couple of times in the show:
    • Subverted with Yurika in episode 5. She notices Sanae in trouble and attempts to help her, but is carried away by the cosplay club members who just happen to find her there. She does help out indirectly later after escaping them. Played straight with the other characters who go to rescue Sanae from the kidnappers.
    • Koutarou and the others help Theiamillis fight off Clan in episode 7. Yurika once again saves the day, albeit indirectly again this time by falling on top of Clan, who had escaped to a nearby room. As she attempted to plan her next attack, Yurika, who was hiding from Ruth with the cosplay club president's rhinoceros beetle, falls on top of her after getting tired while hiding.
    • Koutarou does this for Yurika in episode 8 while the latter is fighting Maki. Then the other girls do this for him and Yurika in episode 9 while fighting by the apartment they live in.
  • Big Eater:
    • In episode 6, Yurika can be seen eating lots of food in the background as Ruth tells Koutarou about the story of the Silver Princess and the Blue Knight.
    • The big guy in the Sun Rangers group in episode 10. He's usually seen eating, even while on the stage that Koutarou and the others are performing on.
    • In Volume 27 of the light novel Yellow Sun, Koutaru, Sanae, Shizuka and Yurika all make it to the Semifinals of an eating Contest at the local shopping district. Sanae wins.
  • Big Fancy House:
    • Implied for Harumi(shes staying in her families second home during the beach episode).
    • Played strait when we finally meet Sanae's Family (500 Year old Shrine, the grounds are "as big as a baseball stadium").
    • The living quarters on both the Blue Knight(Theia) and Hazy Moon(Clan) are big enough for several hundred people to live in.
    • Of course even with all this space available, every one spends all their time in Room 106, which is barely 100 sq. feet.
  • Blank White Eyes: Yurika has some when running away from Ruth in episode 7 after the latter finds out Hercules-chan is a rhinoceros beetle, which she's not too fond of.
  • Bling of War: Volume 16 introduces both Themillis' Battle Ballgown the Combat Dress, and her and Ruth's upgrade to Koutarou's base armor, the Garb of the Lord.
  • Blue with Shock: Yurika and Sanae have this look after Ruth sees Hercules-chan, the pet rhinoceros beetle the former is taking care of for a friend. Ruth surprisingly doesn't seem to be offended at it at first. Until she watches a Sentai commercial showing her that Hercules-chan is a rhinoceros beetle after which she chases Yurika while the latter attempts to run away from her wrath.
  • Book-Ends: In episode 1, Koutarou falls down into a pit after the ground collapses on him. He is seen wandering towards a statue calling him until woken up by Kenji. At the end of episode 12, a similar scene repeats, with Harumi turning into the Silver Princess, and Koutarou turning into the Blue Knight.
  • Boy Meets Ghoul: Boy meets a ghost, a Magical Girl, a subterranean priestess, an alien princess and her servant, a Dark Magical Girl and the alien princess's rival.
  • Break the Cutie: The ghost lady who assisted the two men in episode 5 in kidnapping Sanae, attempts to break the latter's will by telling her that her friends don't care about her, and if anything, are glad to be rid of her. Fortunately for her, Koutarou and the others come to her rescue before her words have a lasting impact on Sanae.
  • Bridal Carry: Koutarou does this for Harumi after a bunch of students trip and fall over each other, and create a large roadblock for the race in episode 3.
  • Butt-Monkey: Poor Yurika gets no respect. During the race in episode 3, her cosplay club dresses her up, but then brings her to the race course tied up in a bag. No one gets to see her outfit, which appears to be a maid outfit, before she's trampled on by other students during said race. And in episode 9, Maki makes her escape and takes away the memories of all the residents of room 106, including where they finally acknowledged her as a Magical Girl, so they assume she's cosplaying again.
  • Cassandra Truth: Koutarou is very skeptical of each girl's claims for the room he's in, particularly as they all sound rather outlandish.
  • Can't Spit It Out: Koutaru has a hard time directly expressing how he feels about the women in his life. Sanae, who can read his emotions, calls him on it constantly. Harumi probably goes the longest between recognizing her feelings and actually telling him, followed by Maki and Clan. the rest of the Girls are pretty quick to go from recognition to expression.
  • Cat Smile:
    • Sanae displays one after lifting up Theiamillis's skirt.
    • Yurika displays these from time to time as well.
  • Christmas Episode: Episode 12, in which Koutarou tries to throw a surprise party for the girls. They end up surprising him instead.
  • Clarke's Third Law: Theiamillis and Ruth are able to detect Kiriha's magically invisible Dogu (the clay figure helpers) with the Blue Knight's technological sensors, which they give technobable explanations of being cloaked. When an attack drone is launched to intercept them, the Dogu comment how a "souless vessel" can't defeat those that possess a spirit, no matter how powerful the lifeless body. The Blue Knight can also analyze and overpower magic girl spells as if they were technological threats.
    • The reason they can is because magicians have existed in Forthorthe in the past, but they have gone extinct/migrated to somewhere else (implied to be the magical girl world Yurika speaks of); however there still exist magical beasts like dragons, although few in number, so magical spell recognition has been inputted in their weapon's AI just in case they need to fight one.
      • Actually when Alaia reigned, she made magic influence become less and less common because she feared that it will be used for evil again, like what Maxfern did.
  • Cliffhanger: Episode 10 ends on one, with several of the girls spying on Koutarou and Kiriha after they leave the apartment together.
    • Volume 28 also ends with one: Maki and Clan Disappears into Light and both mentions a trial starting. The name of the last chapter? The Start of the Trial
  • Clingy Jealous Girl:
    • Theiamillis gets upset that Koutarou seems to be showing "loyalty" to Harumi, the knitting club president in episode 3 while he helps her stretch.
    • In episode 4, all of the girls except Harumi display this when he ignores them while showing off their swimsuits. They bury him in the sand up to his neck as a result. They also don't like that he seems more interested in beetles than them after he accidentally talks in his sleep while on top of Ruth.
    • In episode 10, after Theiamillis decides to help Kiriha out in performing a super hero staged play, Koutarou tries to opt out of it. However, when Kiriha mentions that Harumi would also be taking part, he instantly changes his mind and says he'll do it. Sanae, Theia and Ruth immediately develop some Cross-Popping Veins when they hear that.
    • Ruth gets upset at him as well when he's not being "loyal" enough to Theiamillis.
    • Yurika also displays this for Harumi, wondering why Koutarou would bother with any other girl when he already has the latter girl.
  • Color-Coded Wizardry: Each area of magic has a specific color: Yurika is Magical Girl RAINBOW Yurika because she can use all forms at a high level, whereas Maki is Darkness Navy because she specializes in mind manipulation magic.
    • Red: Energy. lends itself to Attack/Combat.
    • Orange: Transformation
    • Yellow: Barriers/Protection/Reinforcement. See the spell Yurika casts as Theia is preparing to blow up the room in episode one.
    • Green: Prediction/Information/Illusion. The Ball on Yurika's staff is glowing green as she runs up to the gate of the house where the ghost hunters are holding Sanae in episode 5.
    • Blue: Healing/Sumonning. Notice the color of Yurika's initial healing spell on Harumi in Episode 3.
    • Indigo/Navy: Mind Manipulation
    • Violet/Purple: Necromancy. Hence Sanae-chan's hair color and the color of her hitodama lights.
    • White: Creation.
    • Black: Destruction/Balance
  • Compressed Adaptation: The novels have each girl appear before Koutarou on different days, one after the other. In the anime, they all arrive on the same night.
  • Conservation of Ninjutsu: Jack-o in episode 11 gives Theia a run for her money in combat. However, once the robot is ordered to release a large group of mini-robots, they suddenly get defeated rather quickly.
  • Contrived Coincidence: Every girl in the series aside from Shizuka and Harumi wants Koutarou's room for herself for various reasons. Other than Sanae stating she's been living there longer than him, every other girl's explanation sounds rather outlandish to Koutarou.
    • Theiamillis' situation is even lampshaded in the novel. The coordinates are chosen at random from throughout the entire galaxy. This is the very first time in the Empire's history that the chosen spot wasn't empty space, much less being Koutarou's room, in Japan, on Earth, etc...
  • Cool Big Sis:
    • Ruth towards Theiamillis. She is often supportive of the latter's actions, and helps to guide her from doing stupid things, like destroying the Earth because she was insulted.
    • Kiriha usually acts this way towards the other characters, and often helps them out when needed.
  • The Coup: Several times. First in time is the one in ancient Forthorthe that is what starts the story of The Silver Princes and the Blue Knight. The Radical faction of the Earth People attempt one and it is the overarching goal of Darkness Rainbow. Another one happens in modern Forthorthe.
  • Cry Cute:
    • Sanae in episode 5 after Koutarou and the other girls go to rescue her.
    • Yurika in episode 9 when Koutarou tells her he believes she's a Magical Girl despite having lost his recent memories of fighting Maki. Fortunately he vaguely remembered when she got hurt protecting Harumi, which is what causes him to believe her because he knows she's a good person at heart.
  • Curb-Stomp Battle: One of these is responsible for setting up the plot, actually. After the six-girl pileup in Koutaru's room almost escalates into all-out war, Shizuka smacks each one of the girls that show up in Koutarou's room for causing a racket and damaging the apartment, and Koutarou as well. None of them seem able to do anything about it, and just end up getting beat up by her including the intangible ghost girl. Shizuka swiftly forces everyone to sign a peace treaty or she'll kill them on the spot.
    • Koutarou and the other girls delivery one to the two men and the ghost lady who kidnaps Sanae in episode 5.
  • Curtains Match the Window: Ruth.
  • Cute Clumsy Girl: Yurika, who smashes through the window during her introduction, and then when she attempts to look cool when giving out her name, loses her broom and has to catch it during said sequence.
  • Cute Little Fang: Theia, Sanae and Clan all sport this.
  • Dark and Troubled Past: Some of the main characters have issues with their pasts, even if some are very downplayed.
    • Koutarou's mother died while saving him from a traffic incident because of his carelessness and his family (momentarily) collapsed.
    • Sanae was hospitalized due to spiritual energy leaking from her body and her conciousness was seperated as an artificial ghost created by her spiritual energy leaking from her body.
    • Yurika's master Nana almost died while sacrificing herself to protect her.
    • Kiriha was kidnapped by Darkness Rainbow as a child in order to be a sacrifice(The same sacrifice that caused Sanae's condition).
    • Theia, as a princess, was constantly pushed under pressure, didn't have enough time for her mother, and didn't know her father since he was killed before she was born.
    • Shizuka's parents died in a fire accident in a hotel trying to protect her and she had to look out for the Corona House.
  • Date Peepers: After Kiriha and Koutarou are seen leaving the apartment together at the end of episode 10, the other girls immediately get suspicious, and all of them aside from Shizuka, who has work, follow them. It continues into episode 11, as they watch the two at an amusement park.
  • Declaration of Protection: Koutarou makes this claim to several of the girls at different times, such as with Sanae in episode 5.
  • Defiant to the End: Villainous example in episode 11, when Tayuma simply refuses anything short of a war with the surface as his objective for invading. Even after his various plans get foiled, he still attempts to kill Kiriha, and she's forced to knock him out.
  • Disproportionate Retribution: Theiamillis is willing to destroy the Earth over being called flat-chested and subsequently humiliated. She also pulled two rather large guns to use on Koutarou after he accidentally insults her chest size.
  • "Do It Yourself" Theme Tune: The anime's opening "Koukan Win-Win Mujouken" is sung by the four main girls' VAs who's group is aptly. named "Heart Invader".
  • The ending song is also sung by the haniwa’s VA.
  • Double KO: Both Kiriha and Theiamillis end up punching each other in the face and knocking the other out in episode 3 during the final event of the race, where they have to get the other person's bra for the item event.
  • Do Well, but Not Perfect: Kiriha loses the competition to write a manuscript for the school's drama club because hers was too good for the club to pull off well enough. A local university took it up instead, but she still lost because the point was to get the school's Drama Club to use it.
  • The Eeyore: Yurika, who always seems to beat herself up if the other characters aren't doing it.
  • Enemy Mine: Koutarou forms a truce with Sanae regarding their fight over the room, largely because he doesn't really trust the other girl's motives. At least with Sanae it's where she lives and just wanted to left alone, whereas the other girls want it because it's supposedly a gathering point for a large source of power.
  • Everything's Better with Princesses: Theia, Clan, Charl & Alaia.
  • Evil Cannot Comprehend Good: Tayuma in episode 11, who absolutely hates Kiriha's attempt to peacefully subjugate the surface. He instead wants to have her die, and become a martyr to incite the Earth people into a war with the surface. No matter what anyone tries to tell him, he refuses to accept their ideas for a peaceful resolution.
  • Evil Is Hammy:
    • The residents of room 106 in episode 10, when they play the bad guys in a kid's superhero stage show. Koutarou in particular hams it up quite a bit, especially after the hero doesn't make his appearance after the smoke sequence on the stage.
    • Played straight with Tayuma in episode 11, when he intends to invade the surface using a hostile armed force, rather than the peaceful method Kiriha was trying to employ.
  • False Flag Operation: Tayuma, the leader of the military faction of Kiriha's people, intends to do this in episode 11 with her. He was planning to shoot her, then claim her death by a surface dweller to incite the people into a war with the surface. Fortunately Kiriha and the others put a stop to it.
  • False Start: Koutarou appears to be giving Harumi a Love Confession at the beginning of episode 3. The scene builds up like one, but then it turns out he just wants her help in the upcoming race.
  • Fanservice:
    • Kiriha's the most obvious supplier of this at the outset, thanks to her considerable breasts and her willingness to use them to erode Koutarou's refusal, but some of the others get in on it as well (as with Theia being trussed up in her own dress by Sanae, leaving her panties visible for all to see).
    • All of the girls get this treatment in episode 4 while at the beach.
  • Fantasy Kitchen Sink: A ghost, a magical girl, a priestess from a subterranean civilization, a Super Robot-piloting alien princess, her servant, her rival and a dark magical girl. All have a claim on Koutarou's room (and sooner or later, Koutarou).
    • We still have not been told what Shizuka is, but she can see/hit Sanae, has some pretty nifty martial arts moves, and her fists glow when she gets serious, so Ki user seems likely.
      • Turns out that Alunaya(a Dragon) has chosen her as his host so that he could observe and aid Koutarou if he ever decided to call on him
  • Fire-Forged Friends: Though they're still nominally antagonistic towards each other due to wanting to claim the room for themselves, the occupants of Room 106 gradually develop a friendship and help each other out when needed against outside forces that attempt to take over the room by force. Koutarou thinks about his relationship with each of the girls as he rushes home in episode 12 to plan his Christmas party, and how each of them has grown on him.
  • Five-Man Band: One supposedly shows up in episode 10, the Sun Rangers. However, they all wear identical costumes, and worse, share the same name, "Red Shine". The music for their introduction even starts to die down as they introduce themselves.
  • The Fool: Yurika has traits of this. Despite being a Butt-Monkey, she has unknowingly saved the day a few times, such as binding the hostile ghost attacking Koutarou and the others in episode 5, or foiling Clan's secret attack against Theiamillis and the others in episode 7, simply by falling from the spot she was hiding from Ruth, and knocking Clan out before she could get her attack ready. She also helps save the day in episode 11 with her spells even though she doesn't directly take part in combat with the others.
  • Foreshadowing: These words from Volume 4 proved to be exactly true after 9 volumes:
    Ruth: “Since the Blue Knight is shaped like a human, it would be better if someone with combat skills like Satomi-sama controlled it.”
  • Freeze-Frame Bonus:
    • Sanae can be seen floating behind Koutarou in episode 1 as he talks to his father.
    • Karama and Korama can be seen flying towards the window in stealth mode as Koutarou joins the Knitting Society.
    • Done as a moment of Foreshadowing, when Koutarou first sees Harumi, the light hits her hair at just the right angle to look like the Silver Princess' color.
    • One of the men who kidnaps Sanae in episode 5 can be spotted briefly in the spectator crowd near the end of the marathon event in episode 3.
    • When Koutarou throws the charm into the ghost lady, it forms a white sword aura.
    • While Yukari was trying to heal Harumi after the latter collapsed, a white aura surrounds and heals them both, while Harumi thinks of a knight who only appears several episodes later.
    • When Theiamillis is reading about the Silver Princess and the Blue Knight at the beginning of episode 6, if you pause it when it shows the image of the two in her book, it looks suspiciously like Koutarou , while the Silver Princess looks a lot like Harumi.
  • Friendly Tickle Torture: Theiamillis attempts this to wake up Yurika in episode 12, but the latter responds with more sleep talking.
  • Funbag Airbag: How Koutarou meets Theiamillis, when he goes up to the portal she created in his wall to protest yet another strange occurrence popping up.
  • Funny Background Event: In episode 6, while Ruth tells Koutarou the story of the Silver Princess and the Blue Knight, Yurika can be seen behind them eating lots of food. There are quite a few empty packets of food, indicating she's eaten quite a lot.
  • Fusion Dance: One of Yurika's spell. A special case happens when at least two of the nine main girls fuse, the Goddess of Dawn is created.
    • When the girls performed the ritual and poured their life energy to repair Signaltin and Saguratin, the two swords fused to create Nalfalaren.
  • Gainaxing: Kiriha, with sound effects from Koroma and Karama during the swimsuit shopping trip..
  • Girlish Pigtails: Yurika.
  • Good Old Fisticuffs:
    • Shizuka's preferred method of dishing out punishment.
    • Koutarou does this in episode 5 after he runs out of options, and attempts to simply punch the ghost lady who's taken Sanae captive while holding onto a warding charm. He does it again in episode 11 against Tayuma when the latter gloats about his plan to kill Kiriha to incite a war between the Earth people and the surface dwellers.
  • Got Volunteered:
    • After Harumi is chosen for the role of the Silver Princess in the play during episode 6, she is unable to act to her full extent with Kenji, who is playing the Blue Knight. After a brief rehearsal where Koutarou plays the Blue Knight, Kiriha suggests that he play the role instead of Kenji. For his part, Kenji agrees with her, stating that Harumi's acting is much better when it's with Koutarou rather than him.
    • Koutarou in episode 10, when Kiriha tells him she agreed to help a local shopping district perform a superhero show to help promote their business. He at first refuses, but after hearing Harumi would also be taking part, he immediately changes his mind, which also irks the girls a little bit.
  • Hair Decorations: For most of the girls aside from Ruth.
  • Heavy Sleeper:
    • Yurika, as evidenced in episode 12 when Theiamillis, as well as Korama and Karama, attempt to wake her up.
    • Koutarou sleeps through the first to nights of Sanae trying to scare him out of Room 106 much to her iritation.
  • High-Pressure Emotion:
    • Yurika's face goes red in episode 2 after thinking about Koutarou giving her a Love Confession in his letter.
    • Harumi also goes red after Koutarou grabs her hands in episode 3 as if he was going to give her a Love Confession too, only for it to turn out to be him wanting to win the upcoming race. He does pick up on that a moment later, releases his hold, and apologizes to her for the misconception.
    • Theiamillis's face goes red after she imagines a kissing scene with Koutarou and herself in episode 9.
  • Hitodama Light: Sanae has weaponized the lights floating around her.
  • Hoist by His Own Petard:
    • Koutarou probably had malicious intents into tricking Yurika into joining the cosplay club at school in episode 2. Unfortunately said club takes up so much of her time that she's really exhausted when she gets home, and somehow ends up winning several of the card games in a row. Had he not of done that along with Status Quo Is God, she probably would have lost the remainder of her shares of the room and been kicked out.
    • Theiamillis has her men place some shock mines around the balance beam obstacle course in episode 3 in an effort to slow down everyone else. It works initially, until some of the groups that were behind see that she's not having any trouble on her balance beam, so they naturally choose the same one. They then knock her down into one of the mines in their rush to catch up.
    • Kiriha says this trope almost word for word in episode 7 after her two helpers grab the device Clan was using to cause Theiamillis's weapons to self-destruct after she summoned them, and instead has her weapons explode when she summons hers to attack Koutarou with.
  • Human Alien: Theia, Ruth and Clariossa Daora Forthorthe. Source of much angst for Theia when she realizes she is in love with Koutarou because she's up enough on her genetics to know that Half-Human Hybrids ain't going to happen. However...
    • It’s revealed by Clan that Forthorthian and Earthlings have the exact same genetic code and they’re pretty much the same species, making it possible for breeding. The People of the Earth are the examples of Earthlings with Forthorthian blood.
  • Humongous Mecha: Theia's battleship the Blue Knight is one. It can be used by Koutarou as a mecha when used together with the Blue Knight armor
    • Funnily enough, Elfaria, Theia's mother and the one who created the battleship, based it on Koutarou mentioning giant mechas controlled by people (since he's a Sentai fan), which itself, despite Forthorthe's advanced technology, was weirdly never touched upon.
  • Hyper-Competent Sidekick:
    • Korama and Kurama, Kiriha's two little doll helpers(though Kiriha is pretty sharp herself). They often perform a variety of tasks for her, and are quite good at it, such as when they attempt to find where Sanae is in episode 5.
    • Ruth for Theiamillis. She's often the voice of reason for the latter, such as telling her that blowing up the Earth because someone made fun of her breast size would look cause her to fail her test to subjugate the local sentient species. She also does a lot of things to assist Theia and the others up in combat.
  • Hypocritical Humor: Sanae doesn't believe in magic, even though she's a ghost. She also says she doesn't want to die after seeing Theiamillis's Wave Motion Gun appearing.
  • Identical Grandson: Thia and Ruth for their respective ancestors Princess Charl and Lady Knight Flairhan.
  • Idiot Hair: As made especially apparent by the picture used for this page, the anime gives this to all the featured girls. This lead to some sectors calling this show "Ahoge: The Anime".
  • Ignore The Fanservice: Happens to Koutarou in episode 4. All of the girls living with him try to show off their swimsuits, but he's focused on Harumi who shows up at the beach due to having a summer home nearby. They are not happy with him ignoring them, and promptly bury him in the sand up to his neck.
  • I Have You Now, My Pretty: Sanae is captured by two suspicious men in suits, with help from a ghost woman who utilizes her abilities to prevent her from escaping.
  • Imagine Spot: Yurika has one of Koutarou in episode 2 thinking a letter he wrote to her was to give her a Love Confession.
  • Impaled with Extreme Prejudice: Koutarou hurls a charm at the ghost lady attacking them in episode 5. Said charm takes the shape of a sword as it pierces her, while doing no damage to Sanae due to the specific words written on it, "Safe family", which by this point he considers Sanae to be a member of his.
  • Improbable Age: Shizuka owns the apartments that Koutarou lives in, despite being in high school like him.
  • In-Series Nickname: Theiamillis is mockingly called "Tulip" by Koutarou , because during their first encounter, Sanae lifts up the former's skirt and ties it up so that she resembles a tulipnote . Matsudara Kenji a.k.a "Makenzie" Koutarou and his little sister "Makinley". Sanae calls both Makenzie and Clan "glasses"
  • Innocent Cohabitation: Two years in and the Girls of 106 are STILL trying to get Koutarou to First base note .
  • Instant Fan Club: Theiamillis appears to have subdued some of the students at the school in episode 3, who then follow her around like an army.
  • Invisible to Normals: Maki and Yurika fight in an empty building in episode 8, while also casting a spell around the area to put themselves in a different dimension so as not to destroy the actual area and avoid unwanted attention. However, Koutarou , and with his help, Sanae, both manage to break through the barrier, which surprises both of the girls when they spot the two. Maki concludes that Koutarou must be a powerful mage to be able to enter their zone.
  • It's Not You, It's My Enemies: Koutarou tries to do this after Harumi gets caught up in a fight between Yurika and Maya. he is shot down in about five seconds as everyone observes that she's going to be a target anyway, so the best thing is for her to always be with one of the other girls, and that he's only doing this because he tends to push away those he cares about.
  • Japanese School Club: Koutarou is a member of the Knitting Society.
  • Knight of Cerebus: Things seem to take a turn for the worse with the introduction of Maki and the apparent death of Yurika at the end of episode 8. She never really died though
    • Clan second appearance make her and Koutarou travel back to the past Forthorthe thus setting the event in motion and mark the beginning of Blue Knight legend.
  • Know-Nothing Know-It-All: Harumi asks Yurika for some dating advice in episode 8 after telling her she wants to get closer to Koutarou . Yurika's advice is to ask him out on a date, or do a double-date, neither of which seem easy for Harumi to do.
  • Lemony Narrator: Ruth in episode 10, when she provides the narration for the superhero stage show.
  • Let's Get Dangerous!:
    • Koutarou seems like an Ordinary High-School Student at first, but he seems to have some latent powers that show up when needed to combat the Villain of the Week, allowing him to fight rather competently against whoever they're up against at the time.
    • Kiriha attempts not to use violence personally (though she does let Korama and Kurama do whatever they need to in combat), but she punches Tayuma rather hard when the latter is obsessed with starting a war with the surface no matter the cost.
  • Loads and Loads of Characters: Almost every character is introduced in the first episode of the anime, and they give their motivations for wanting Koutarou's room. Then some villains show up in later episodes as well.
  • Loophole Abuse:
    • Though they're forbidden from attacking each other, Theiamillis claims her Blue Knight was simply attacking some suspicious objects that were floating around the school grounds in episode 3 when Kiriha asks why her two helpers were attacked by a suspiciously blue alien Attack Drone. A scene then shows the two helpers badly beaten up, but having emerged victorious over the Blue Knight from the earlier battle.
    • The two men who kidnap Sanae in episode 5 try this, asking Koutarou and the others what law they've broken by capturing a ghost. While they're technically correct, it doesn't stop the others from rescuing their friend.
  • Love at First Sight: The Sun Ranger's female member falls in love with Koutarou after he berates their team in episode 10, thinking they were extras that flubbed their part in the play.
  • Love Epiphany:
    • Sanae develops this around episode 5 after Koutarou brings the other residents to rescue her.
    • Theiamillis begins to feel this way after watching Koutarou act out the role of the Blue Knight in episode 6.
    • While Harumi seems to have an interest in Koutarou, it doesn't really touched on until episode 7, when she can only perform her role in Theiamillis's play if Koutarou is playing the Blue Knight. And in episode 8 she asks Yurika for advice on how to get closer to him after seeing how relaxed and casual he seemed to be with other girls.
    • In episode 9, while Yurika is happy to see Harumi on a date with Koutarou after she told her to ask him out, she wonders why it hurts a little to see them together.
    • In episode 11, Kiriha goes to the amusement park with Koutarou to relive moments from ten years earlier when she went there with a boy she fell in love with. Though she doesn't remember his face or even his name, it's strongly implied that the boy was a younger Koutarou, since she mentions he would be about her age right now.It's actually Koutarou,
      • What she says is that "he was the same age back then as they are right now". The reason is Koutarou travelled back in time for about five minutes (present time), which took him for several months (Koutarou time) to before the origin of the universe, Forthorthe 2,000 years ago (becoming the Blue Knight), 20 years ago (meeting Theia's mom) and 10 years ago (becoming Kiriha's first love). He doesn't remember the first destination, it's under the misconception that he has stolen someone else's role in the case of the Blue Knight (though it’s revealed HE is the Blue Knight), and he wasn't completely sure if Kiriha was Kii-chan (he realizes this first when he gave the card and she scribbled it the same scribbles as Kiriha’s card, though he is interrupted when he was about to ask and forgot).
  • Love You and Everybody: While Koutarou has frequently expressed his attachment for all the invaders this trope is Defied in Volume 26 when all the girls together ask him if he loves them as women not just friends or family. He answers in the affirmative.
  • Magical Girl Warrior: Yurika, Maki, Dark Crimson, Maki's master Maya, and Yurika's Master Nana.
  • Magic Versus Science: Averted so, so hard. Prime example, Dark Crimson after learning a little optical science turns a basic flashlight spell into a high powered laser rifle.
  • Magitek: Mostly the work of The People of The Earth.
  • Male Gaze: Used from time to time, such as the low angle focus on Yurika when she's first kicked out of Koutarou's apartment and describing her outfit as something her superiors made her wear.
  • Martial Pacifist:
    • A major portion of the legend of The Silver Princess and The Blue Knight was the care they took in avoiding casualties during the civil war against the forces of the coup d'etat because, no matter which side the solders were on, they were all subjects of the Princess and her responsibility.
    • While Kiriha is trying very hard to accomplish the invasion of the surface by the People of the Earth with out a shot fired, she is perfectly capable of applying the beat down when the situation calls for it.
  • Maybe Magic, Maybe Mundane: How Koutarou seems to have powerful fighting skills, and a lot of the things that happen around Harumi when the non-normal everyday stuff starts happening such as her channeling power after fainting in episode 3, which Yurika unknowingly utilizes to help heal her, or when she manages to give Koutarou a weapon in their fight against Maki.
    • It seems that Harumi is the avatar of the Goddess of Dawn, a conscience that precedes the universe and has knitted it from scratch. The Silver Princess was also an avatar and Harumi's former incarnation.
  • Mega Ton Punch: Maki suffers one from Shizuka in episode 9 after she wrecks the latter's apartment during her fight with Yurika and the others.
  • The Men in Black: Two men in suits show up in episode 4, and attempt to kidnap Theiamillis on the beach. They claim to have no interest in regular humans, but that doesn't convince the other characters with them trying to capture Theiamillis. They later capture Sanae in episode 5 after she wanders off by herself and is looking at the ocean.
  • Muggle Best Friend:
    • Kenji, Koutarou's childhood friend. He has no special abilities or powers like the other girls or even Koutarou. Typically any scene where he's present will be a fairly mundane one aside from unusual things caused by the other girls such as the race in episode 3.
    • Subverted with Harumi. She seems like an Ordinary High-School Student at first, but her interactions with Yurika has caused her to show some magical things happening using her body. However, she typically doesn't remember anything after said scene where she shows any magical powers and for the most part remains ignorant of the magical stuff that occurs.
  • My God, What Have I Done?: After another argument with Koutarou, Sanae runs off in episode 4. He goes looking for her in episode 5, and has no luck but runs into Harumi. After explaining what he said to Sanae, Harumi gives him a very similar statement about their club which makes it sound like they're total strangers who hate each other. After she explains it to him this way, he realizes what he said to her was hurtful, and steps up his searching to find Sanae.
  • Named Weapon:
    • Signaltin: Forged by the Gods royal Infinity +1 Sword of Forthorthe
    • Saguratin: Thiamillis' Birth Sword. Name means Golden Lily
    • Nalfalaran: Reforged Blade of the above. The name means "The Rainbow that Forms before the Dawn." in ancient Forthorthian
  • New Transfer Student: Every single one of the girls that moves into Koutarou's apartment transfer to his school, and his class no less, in episode 2. He is not happy about this either, as he viewed school as the one place he could get away from them. Interestingly even Sanae, despite being a ghost, shows up at the school wearing the girl's uniform because she (originally) is supposed to study in that school
  • Not So Different:
    • The ghost lady in episode 5 tries to break Sanae's will by stating that humans will betray ghosts, and says she was abandoned by someone. She also tells Sanae that humans don't want ghosts around, hence why they carry charms to ward them off, causing the latter to start thinking back to all the times Koutarou pulled them out on her. Fortunately that's not the case as Koutarou and the others come to rescue her.
    • After Harumi is unable to understand the Silver Princess's role in episode 6, Koutarou helps her rehearse the role. As he does stand-in for the Blue Knight, she begins to understand the Princess's dilemma, connecting it with the knitting club being in danger of getting disbanded until Koutarou joined, and why the Princess didn't want him to sacrifice himself from their enemies so she could escape.
  • Not What It Looks Like: Koutarou is caught in several of these in episode 4, such as when he accidentally crawls on top of Ruth while sleeping. Sanae also sees him alone on the beach with Kiriha and attempts to surprise them but fails due to his charms electrocuting her.
  • Oh, Crap!: Any of the characters who draw the wrath of Shizuka will usually have this look on their face, such as during the first episode, and Theiamillis in episode 3 after Shizuka finds out she put the mines on the balance beam obstacle course.
  • Ordinary High-School Student:
    • Kenji, Koutarou's friend, who seem unaware of the things going on around the residents of room 106.
    • Averted with Koutarou. While he seems like one at first, he also seems to have some powers and capabilities that go beyond what a normal person can do, such as when he rescues Sanae and Yurika from their respective rivals.
    • Subverted with Harumi. For the most part she seems to be a regular high school girl, but then things happen around her that suggests there's more to her than meets the eye, especially in episode 12 when she flat out turns into the Silver Princess and scolds the Blue Knight, aka Koutarou, for poking fun at her. It’s later revealed she’s the reincarnation of Alaia, the Silver Princess that is capable of possessing her temporarly.
  • Out-of-Character Moment: In-universe example in episode 10, when Theiamillis, playing the role of a bad guy in a kid's superhero show, says they defeated the hero. A boy says the hero wouldn't be defeated so easily and is much bigger than she is, she promptly sends back a snarky reply. Sanae, invisible to them, then has to remind Theia to stick to the script.
  • Panty Shot: Sanae lifts up Theiamillis's skirt after the latter boasts no one can go through her defensive barrier. Due to her appearing like a tulip, Koutarou gives her the nickname "Tulip". She gets several in the Novel illustrations too.
  • Parental Abandonment: Faster to count who isn't dealing with this.
  • Plausible Deniability: When Ruth detects a cloaked Korama and Kurama above the school, she reports that the Blue Knight's sensors identified them with a 63% certainty. Theia decides to use that 37% uncertainly as an excuse to send an Attack Drone after them.
  • Playing a Tree:
    • A variation of this occurs in episode 6, when Yurika was originally supposed to play the back half of a horse. She later gets "upgraded" into Villain A instead, though interestingly in episode 7 she's still wearing the horse costume. In the Novels she actually asks to be upgraded to Tree.
      • That's because her horse-rear acting was so good they gave her both roles. A Yurika lookalike (more in spirit than in face) from the original Silver princess story HAD been posing as the Silver Princess's horse (unicorn) to spy on her (this could be related, as she was found because the Princess's entourage was composed of people that reminded Koutarou of his acquintances and the one who reminded him of yurika was the horse).
    • This happens to Yurika again in episode 10. She ends up wondering why she keeps getting put into these roles.
  • Plot-Based Voice Cancellation: Koutarou says something to Yurika in episode 9 while carrying the latter on his back to find Maki. However, part of it is unheard as a train goes past them while waiting at a railroad crossing. It's revealed near the end of the episode when she recalls what he said, "Suns and rainbows suits you better" when he tells her that she shouldn't be engaging in combat.
  • Power Glows: Despite using a prop costume and sword, said gear starts to glow in episode 7 after Koutarou rushes Clan to protect Theiamillis. It even manages to start breaking through Clan's shields. A different sword used by Koutarou in episode 9 also does this.
  • The Power of Friendship:
    • A big theme in episode 3 for Yurika when Harumi helps her out during the race.
    • This plays a role in rescuing Sanae from kidnappers in episode 5.
    • Koutarou and the other occupants of room 106 help Theiamillis defeat Clan in episode 7.
    • Yurika makes use of this trope again in episode 9 when Koutarou and the others help her to fight Maki.
  • Pretty Freeloaders: Yurika, in a Closet Sublet.
  • Psychic Link: Sanae can do this by touching someone and uses it to taste food, usually through Koutarou. Koutaru and Maki form one when he rescues her during the ski trip
  • Red Eyes, Take Warning:
    • Shizuka's eyes turn red when she gets mad at the girls and Koutarou messing up one of her rooms.
    • Ruth doesn't take to beetles very well after Koutarou seems more interested in them than her while he was sleeptalking. Consequently any time she's in view of a beetle, or an image of it, she tends to go berserk and tries to destroy them.
  • Red Herring: The Sun Rangers are warned that the Earth Empire is invading at the start of episode 10. However, they don't see anything out of the ordinary when they do go out. And at the end of episode 10, they're warned of an attack again, this time with a much stronger urgency than the last time, indicating an Earth Empire attack on the town was imminent. Then a large submarine is shown, with several idols similarly shaped to Kiriha's helpers sitting in some of the chairs in the command deck, with an Earth Empire citizen captaining the sub.
  • Red Oni, Blue Oni: Theia and Ruth
  • Reluctant Fanservice Girl: Yurika's outfit, which she complains doesn't hide her butt or breasts very well. She tells Koutarou and Sanae that she was forced to wear said outfit by her superiors.
  • Right for the Wrong Reasons: In Vol. 6, the Sun Rangers keep finding Kiriha while tracking energy reactions from Subterranean invaders. Well, technically they're not wrong, but she's from the faction that wants a peaceful emigration.
  • The Rival:
    • Theiamillis has one, Clan, that shows up in episode 7.
    • Yurika's rival, Maki, makes her appearance in episode 8.
    • Several of the short stories included as bonuses in the published books detail the Hanawas (one sided) rivalry with Ruth's Attack Drone.
  • Running Gag:
    • No one believes Yurika is a Magical Girl for a long time. Koutarou finally starts to believe it at the end of episode 9 despite Maki taking his recent memories of their fight earlier. He still vaguely remembers Yurika getting hurt protecting Harumi however, hence why he believes her.
    • Koutarou tends to move around a lot in his sleep, often ending up in front of the portal to the Blue Knight where he gets stepped on buy Ruth and Theia.
    • Ruth any time rhinoceros beetles are brought up, due to Koutarou being more interested in catching them despite being on top of her while acting out a dream in episode 4. Kenji suffers a fly swatter to the head in the previews at the end of episode 9 for it. And Ruth nearly ruins a sentai show since the main characters are derived from rhinoceros beetles.
  • The Scapegoat:
    • Happens to Kenji, Koutarou's male friend in episode 3. During the beginning of the race, a bunch of students trip and pile up on each other. Koutarou then takes Harumi and steps over them in order to get through. Some of them later catch up to him, trying to figure out who was the guy that stepped on them earlier, with the only reference that he was with a girl. Koutarou is understandably worried, but then they assume it's Kenji because Shizuka is with him, and proceed to rush towards him before they all fall off the balance beam and hit a shock mine laid by Theiamillis. Koutarou escaped in this instance because the girl he was with, Harumi, wasn't even at the course yet with him.
      • That said, Kenji, along with the three guys, all chase after Koutarou after the race is over, and they find out he was the one who stepped on them. After the end credits, both he and Theiamillis (who was beaten up by Shizuka for her mines in the obstacle course) are pixellated blobs slowly crawling towards the other girls, and cause Yurika to also start turning dark like them.
  • Scary Shiny Glasses: Clan, a relative of Theiamillis, sports this look in episodes 6 and 7.
  • School Festival: Koutarou's school has an athletics festival in episode 3, where they enter in a race around the town. To mix things up, there are various checkpoints where they have to do certain things, such as solve a math problem or eat some bread. Naturally each character has their strengths and weaknesses during said events, such as Koutarou having trouble with the math portion, but gulping down the bread quickly at the bread eating checkpoint. A map of the town is shown regularly along with each character's location on the race course.
  • Screw the Money, I Have Rules!: Kiriha offers Koutarou a few bars of gold to leave the room. Though he considers it, he changes his mind after she reveals she's going to take over the world after collecting the spiritual energy culumulating in the room.
  • Self-Imposed Challenge: In-universe example during episode 6. Theiamillis is writing a play by hand, when Ruth mentions that she has access to an auto-writing device. However, she tells the latter that she wants to keep herself on the same level as the other girls and Koutarou regarding writing the story out.
  • Sequel Hook: At the end of episode 12, though things mostly wrap up nicely, there are still other issues that are still at play. Clan and Maki are still around, and they both watch Koutarou at school, and there are hints indicating more about the Silver Princess and the Blue Knight that can be unlocked. Finally, the girls after the credits mention that a fictional show has ended its run, and hoping there'll be more of it. The anime only covers up to volume 7 of the novels, there were 17 published when it came out.
  • Serious Business: Koutarou with writing a play in episode 6 due to a challenge from Kenji. He asks the girls for help, and gives them an incentive of giving his points in the room to the girl whose play is chosen. Theiamillis is skeptical at first, until he mentions that there are certain battles a man must take part in. Or in this case, a play.
  • Shout-Out: One of the item Shizuka brings to the inn in Episode 4 is a shortened version of Bankai Zangetsu. When Koutarou starts swinging it around, Sanae asks his he is trying to make her pass on.
  • The Slow Path: After their adventure in Ancient Forthorthe, Kotarou and Clan sleep in stasis aboard her ship for two thousand years, until Forthorthe's technology develops enough to finish repairs on it. Then they return to Earth and, after another adventure, sleep another ten years so they can show up shortly after they left.
  • Smashing Watermelons: Done in episode 4. The girls also deliberately place said watermelon close to Koutarou's head while he's buried in the sand due to them getting jealous that he seems to be ignoring them in favor of Harumi.
  • Sore Loser: Koutarou and Yurika act this way after their plays don't get chosen in episode 6. However, they both get over it quickly.
  • Status Quo Is God:
    • The occupants of room 106 attempt to claim the share of the room from the others in various events and games. Naturally if someone is too far in the lead, something will happen that will cause them to lose their shares so the person with the least points will then catch up, such as Yurika being dead last in episode 2 to suddenly winning a lot of games in the latter half of the episode and the obstacle course race in episode 3.
    • In episode 9, after being soundly defeated, Maki releases a pre-cast crystal, which causes her to disappear, along with all of the characters seemingly having forgotten everything that happened regarding her. Unfortunately this means they also forgot Yurika is a Magical Girl, and assume she's doing her cosplay thing again.
    • Kiriha states in Episode 11 that she actually needs to keep the current state of nobody winning nor losing the competition over apartment 106 going to give her actual plan time to work.
    • In Volume 11 Kiriha and Koutarou discuss how until the various issues with each of the Invaders is resolved the romantic situation can't be addressed.
  • Storming the Castle: Episode 5 features one when Koutarou and the other girls go to where Sanae was taken after being kidnapped.
  • Super-Deformed: Happens on a regular basis in the anime, especially during the previews for the next episode.
  • Suspiciously Specific Denial: In episode 6, after finding out Yurika brought a pet beetle home, the other residents panic at what might happen if Ruth, who doesn't like them after Koutarou seemed more interested in them than her, would do if she saw it. Ruth then comes back into the room having forgotten something, and Yurika nearly says they're not hiding a beetle before Koutarou closes the closet.
  • Take a Third Option: Shizuka, upon finding out the weird situation with Koutarou and the girls, decides that instead of kicking them out, she's going to force them to resolve their dispute peacefully. She then has them sign a contract stating likewise, and threatens to punish them if they don't obey her rules. Considering the beating she gave them moments before, none of them argue with her about it.
  • Taken for Granite: Koutarou, and oddly enough, Sanae, both go grey when Yurika shows them the pet beetle she's taking care of for the vice president of the Cosplay club in episode 6.
  • Take Up My Sword: According to Yurika, she's actually just trying to hold the fort for the real Magical Girl, who got hurt saving her life.
  • Taking You with Me: Tayuma attempts this in episode 11 after his plans were foiled by Kiriha and the others. He attempts to detonate Jack-o, his giant robot, but a spell Yurika cast absorbs the explosion, so nothing happens.
  • Talking in Your Sleep:
    • Koutarou does this in episode 4. It also triggers Ruth's Berserk Button and Running Gag of not liking rhinoceros beetles as a result.
    • Yurika in episode 12, when Theiamillis attempts to wake her up.
  • Team Mom: Alternates between Shizuka, Shizuka and Harumi, depending on which girl is with the group at the time. Ruth has her hands full riding heard on Theia.
  • Tear Tropes: Lots and Lots of crying in this series.
  • Tempting Fate:
    • Theiamillis claiming no one can get through her barrier after she uses it to stop Koutarou's attack with a baseball bat.
    • Non-hostile example in episode 6. Koutarou tells Theiamillis he has the perfect person in mind for the role of the Silver Princess. When she inquires who he's referring to, Harumi just happens to walk into the room, asking if there was anything she could do to help.
    • The Sun Rangers group at the beginning of episode 10. One of the mentions that while their force was formed to protect from bad guys, another mentions that surely nothing would happen. A man, presumably their leader, then shows up on a monitor and tells them their hated enemies from the Earth Empire is invading the surface, prompting them to jump into action.
  • There Is No Kill Like Overkill:
    • Theiamillis was prepared to destroy Earth for the insults she received from Koutarou. Fortunately Ruth tells her if she destroys the planet she'll have failed her mission to have the sentient life at a chosen designation worship her. Which just also happened to coincidentally be Koutarou's room.
      • That said, she does end up using her main ship's weaponry against Maki in episode 9, mostly to punish the latter for hurting Koutarou. She first has her ship fire some Beam Spam shots, then once Maki's magical shield is broken through, she readies a Wave Motion Gun shot. Fortunately Shizuka shows up and simply punches Maki for wrecking her apartment.
  • The Three Faces of Eve: Played with. A lot.
    • Child: Sanae-Chan (her appearance is described in Volume 1 as being elementary school age), Yurika, Themilis, Clan, Kiriha when she is being Kii
    • Wife: Kiriha, Ruth, Shizuka, Sanae-san.
    • Lover: Kiriha again, Harumi as the one Koutaru shows the most obvious romantic attraction to, Shizuka very occasionally, Sanaae more and more as she integrates.
    • Maki, due to the way their relationship develops, operates in a completely different paradigm.
  • Through His Stomach: Kiriha attempts this in episode 2, by making food for everyone, especially Koutarou.
  • Throw It In!:
    • In-universe example during episode 10. While performing a superhero stage show, the hero of the show, Harukaze man, was supposed to show up after a puff of smoke appears on the stage. However, he doesn't show up on cue, so Harumi and Koutarou throw in some improvised dialogue to extend the scene a little longer. The Sun Rangers then show up, seemingly to cover for Harukaze man, but they perform miserably, causing Koutarou to criticize their identical costumes and hero name. The actor playing Harukaze man shows up a little while later and was delayed due to Shizuka's costume ripping and doing emergency sewing. However, no one seems to know about the Sun Rangers showing up or who they are.
    • Happens again in episode 11, this time with Ruth interrupting a show where the heroes are derived from rhinoceros beetles. Shizuka is the lead actor, and ends up having to fight her for real in order to prevent her from disrupting the show and affecting her paycheck. Fortunately she's able to subdue Ruth and put on a good, if improvised show.
  • Throw the Dog a Bone: A few examples:
    • When Kiriha makes food in episode 2, she originally just intended to feed Koutarou, but ends up feeding the other girls as well. Sanae "possesses" him by hugging him from behind in order to taste the food since she can't eat any herself due to being a ghost. Yurika also gets to join in after Koutarou gets sick of seeing her crying and whining.
    • Yurika lost many of the card games played in episode 2, to the point that she was going to be kicked out after losing her territory in the room. Then Koutarou throws her into the cosplay club, thinking it'll be over for her and that she can cosplay outside of his room. Unfortunately for him she somehow gets better at the card games while exhausted due to being forced to spend time with the cosplay club that she ends up winning three games in a row.
      • If one follows the card games scenes (including the opening), they will see that Yurika has a decidedly transparent poker face, all but making her a pushover when it comes to Old Maid. When she is exhausted, however, she is unable to muster enough energy to react to the other players' actions, making her unreadable.
    • Yurika also gets another moment to shine in episode 3 when she attempts to use her magic to heal Harumi after the latter collapses during the race. Though it doesn't work initially, The Power of Friendship kicks in, and it heals both girls, which allows them to reach the finish line before the other students, who are really worn out by that point due to fatigue and Theiamillis's mines.
  • True Companions: Sanae finds out about this when Koutarou and the other girls come to rescue her in episode 5. She was on the verge of believing they abandoned her, until Koutarou gives her a charm which doesn't affect her but destroys the evil ghost lady who was attacking them.
  • Undead Tax Exemption: While a New Transfer Student is common enough, it seems unusual that all of the girls transfer at the same time, and also end up together in the same class as Koutarou. Averted when Theia and Ruth have to go back to Forthorthe suddenly, they actually go through the process of submitting a leave of absence from the school.
  • Valentine's Day Episodes: Last Story in Volume 9. The invaders all give Koutarou Valentines not "friend" chocolates, though not all of them tell him that. We meet Ruth's Affably Evil fiance at the same time.
  • Villain of the Week: After the first three introductory episodes, a new villain shows up during the girl's respective arcs. Though the first two are more or less soundly defeated, Maki makes her escape, and a scene after the last battle shows her talking to other magical girls, who acknowledge that Yurika somehow obtained some allies that they'll have to deal with.
  • Villain Team-Up: Maya, a.k.a. Dark Navy, has been working with he Radical Earth People faction for over ten years. After Volume 13, she picks up Elexis as well, adding his technical expertise to the Radicals' efforts.
  • Villainous Rescue: Though not a bad guy per se, in episode 3, Theiamillis inadvertently helps out Koutarou in the race when the shock mines she placed around the balance beam obstacle course starts going off and knocking various students off of the beams. As a result, he gains the lead near the end of the race, though he collapses from exhaustion just before the final event.
  • Visions of Another Self: When Koutarou and Clan go back to the time of the Princess Alalia, she and her companions bear an uncanny resemblance to the invaders of Room 106.
  • Violently Protective Girlfriend: While they're not dating, Theiamillis was more than willing to use her ship's Wave Motion Gun on Maki for hurting Koutarou in episode 9 while he was fighting the latter with Yurika. Fortunately Shizuka stops that and punches Maki for messing up her apartment. She also protects him in episode 11 when Tayuma, one of Kiriha's people, attempts to invade the surface on his own.
  • Wave Motion Gun: Theiamillis's ship orbiting above Earth is implied to have one. Though it's actually never been fired on-screen, she has threatened to use it on two occasions, the first time in episode 1 when she first shows up, and again in episode 9 against Maki after the latter hurt Koutarou. Does get used in volume 26.
  • We Have Reserves: Tayuma orders Jack-o to release a large group of mini-robots in episode 11. Fortunately Conservation of Ninjutsu kicks in, and the now larger enemy force is quickly dispatched by the main characters.
  • Weirdness Magnet: Room 106.
  • What the Hell, Hero?:
    • Sanae essentially asks this when she tries to pop up on Koutarou and Kiriha while they are alone on the beach in episode 4. Unfortunately for her, he was wearing his charms, which shocks her and causes her to run away. Later that morning he tries to clear up the misunderstanding but she runs off thinking he hates her.
    • While Yurika normally gets upset when no one believes she's a Magical Girl, in episode 8, she calls out Koutarou on this when he invites Maki, her rival, to the room. She gets really angry that they still won't believe her, and on top of that, are throwing a party for her enemy while believing both girls are simply cosplayers.
  • Why Did It Have to Be Snakes?: Ruth doesn't seem too fond of beetles after Koutarou seemed more interested in them than her during his dream/sleep walking in episode 4.
  • Why Don't You Just Shoot Him?: Averted in episode 11, Tayuma and his men attempt to shoot Kiriha. Fortunately none of their bullets make it past a magical barrier put up in front of Kiriha, and any gun pointed at her is either destroyed, or the attacker is subdued before they can get a shot off.
  • Wise Beyond Her Years: Harumi, who helps the other characters out with her advice, such as helping Yurika to believe in herself in episode 3. And later with Koutarou to help him make amends with Sanae after their argument, causing the latter to run away.
  • The Woman Wearing the Queenly Mask: Major Theme! A big part of the relationships between Koutarou and Kiriha, Theia, and her mother Elle, and the Silver Princes and the Blue Knight is that the women feel comfortable droping the mask around them.
  • World of Action Girls: Other than Harumi, every single one of the main cast is capable of fighting, some better than others.
  • Xanatos Gambit: Tayuma in episode 11, employs a large variety of things in an attempt to get his war with the surface dwellers, from killing Kiriha and blaming a surface dweller, to using a giant robot, to even attempting to simply shoot her. All of his methods ultimately fail however, since Kiriha and her friends are able to stop him.
  • Yamato Nadeshiko: At least four of the girs touch on this trope.
  • You Are Not Alone: Yurika and Kiriha to Koutarou, Maki and Koutarou to each other.
  • You Can See Me?:
    • Sanae's reaction when Koutarou comes home after the fall, and proves able to see her ghostly antics. She's also surprised he can touch her, when he picks her up to throw her out of his room. Interestingly Shizuka is also able to see and hit her.
    • Averted with Harumi, who doesn't seem to notice Sanae at all.
  • You Gotta Have Blue Hair: Sanae has purple hair (in the anime) and Ruth has blue hair. Both Clan and Nana's hair is pink and the Silver Princess Alia's is in fact Silver.
    • Granted, one is a ghost (she could have had normal hair color back when she was alive it's orange) and the others are aliens and magical girls. I'd wonder why no one else has pointed that in the school yet, but they could think that a foreigner dying her hair is not as delinquent-like as a Japanese youth doing the same.

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