Takamachi Nanoha is just your average nine year old girl thrust into an extraordinary situation, or so she thought.After bringing Yunno home for the first time, the young mage-turned-ferret remarks to her how he felt strong magical power from Nanoha's mother, which would explain the incredible magical potential he felt from Nanoha. Nanoha doesn't believe him.At the same time, her mother can feel her daughter's magic awakening, and decides to reveal the truth when the time is right.That time ends up being during a confrontation between Nanoha and Fate, where she decides to intervene, becoming Fate's new opponent. Fate is shocked at the strength of Nanoha's mother that she had to ask, "Who are you?"
"Who am I, you ask?" The woman smirked as she looked at Fate with her red and golden eyes. "My name is Lina Takamachi. But I used to be known as Lina Inverse."
Absence Makes the Heart Go Yonder: Lina was pretty much resigned to being stuckon Earth. She also ended up falling in love with Shiro who found her unconscious when she first arrived, got married, and had Nanoha. Thus when she learned the TSAB located her home universe, she knew her return was going to be hard for her old friends, especially Gourry, since it was her attempt to save him that started all this. She figured that there was a chance that Gourry and Syphiel got together. However, it gets more awkward when she returns home, as it turns out it's only been a month since that battle with Hellmaster.
Hayate ends up facing down a Mazoku who goes by the name of "Archer", and Fate ends up facing down a Mazoku named "Mokka" during the Red arc of the story. Hayatelampshades the situation against her opponent, of course.
Affably Evil: Dolphin, Zelas and Xellos, of course. There are times it's easy to forget that they are, in fact, creatures of pure evil. Then they go and randomly kill or curse people for no real reason.
An Eye and a Hand: The price Signum paid for attempting to knock out Cinque instead of trying something dangerous. Later mentioned that Cinque was barely able to hold her rage in check and was thankful that Signum didn't try to attack her.
Handicapped Badass: Laevatein's original body was retrofitted into a cybernetic hand for Signum. Due to the newness of the hand, she was advised to only use Laevantein's blade form as anything more might have broken the new hand. Her depth perception is also hindered by the lack of an eye.
Arc Welding: Original villain Death Bringer Garoth didn't just begin to play his hand during the events of A's. He was also responsible for the catastrophic failure of Precia's experiment and the corruption of the Book of Darkness.
Artificial Limbs: After losing an eye and a hand to Cinque's Rumble Detonator, Signum's right hand is replaced with a cybernetic prosthesis created from the melted down scraps of Laevatein's original framework. Her eye is a total loss, though, so she gets an eyepatch for that.
Shiro, who manages to hold his own when traveling with his family and friends through Lina's homeworld. It helps he temporally wielded the magic absorbing Blast Blade before relinquishing it to Gourry.
The Shine arc tosses in Miyuki as the new owner of Gorun Nova and Suzuka and Arisa, who finds themselves drawing the attention of Riksfalto.
Awesomeness Is Volatile: Really... mixing the Dragon Slave with Nanoha-style magic? They were bad enough individually... but now...
From his position, Chrono floated up and gaped at the destruction. Where there was hills, flat area and some small bodies of water...
Was nothing but a large sunken hole in the ground that had some rocks that were glowing red. Well, that and the large amounts of glass that people were walking on. Other than that, he was certain that if they had gotten there a moment later, none of those girls would be alive, hell, he was almost certain that the continent would be split in two before the energy dissipated naturally.
Chaos magic can do a lot of things, but it is unpredictable and has a nasty tendency of making its users go berserk the first time they use it, as anyone who was in the same area of Nanoha, Cinque and Dieci found out.
Babies Ever After: Not only does Try have the original canon ending of Filia receiving the egg of the reborn Val, Lina announces that she's pregnant again.
Not to mention Hayate becoming pregnant in the SSX arc due to being unisoned with Reinforce for so long. Rein is understandably confused.
Bad Boss: Dynast Grausherra. At least, when he pretty much sees Sherra as worthless after being defeated by Xellos. Of course, he later try to use Sherra as a backup body when Lina vapes him with a Ragna Blade fired through Galveira. Zelas prevents his plan from succeeding though.
Batman-Gambit: Regius and Quint pull off a beautiful one near the end of StrikerS: Knowing that the Brains have too many friends in high places, the two instead arrange for Due to "escape" Riot Force custody. When Vita and Leti find her they also find them, and the Leti orders Vita to kill them. As it turned out, they're abominations to the natural order, and Bureau law mandates that such creatures are to be exterminated on sight.
Big Bad: Plenty of those throughout the course of the series, which is perfectly understandeable since the fanfic encompasses numerous arcs of two different anime series. One takes the cake though. Levi, Mazoku-revived Alicia Testarossa, is the most recurrent and most repulsive one, appearing in numerous arcs to constantly threaten the universe, Kick the Dog and escape after doing some lasting damage.
Big Damn Heroes: Aside from the canon rescue of Nanoha in A's beginning, we have Precia, the poster woman for abusive mothers, who saves Fate from Alicia's tortures in Jump. Following that is Chrono, Yunno, and Shamal who uses the Jewel Seeds to create a Sea of Chaos rift to keep Death Bringer from killing Lina, and then Unison Reinforce who keeps Death Bringer from pulling a Taking You with Me with Lina.
Zelgadis finally gets to show off as he saves Erio, Caro and Fried from the Mariages. A moment later, Kuma and the Florian sisters show up to help as well.
Revolution has Lyos and Pokota bailing out the kids from Gram's subordinates.
Big Eater: Shockingly, not Lina. Having basically retired and cut back on her magic usage, Lina doesn't need to eat as much as she used to. (Though she still eats a lot.) The kids on the other hand...
Sette is revealed to be this in Numbers by eating Four steaks, eight pancakes, two hamburgers, a whole apple pie, twenty bread sticks, cheese sticks, at least eight refills on her drink, and some crackers. Then she wants ice cream.
Birth-Death Juxtaposition: The final chapters of the Shine arc has Lina giving birth to her new son Arashi and Precia Testarossa passing away, just as she bequeathed her magical knowledge to Fate.
Boxed Crook: Precia gets a pardon provided that she helps stop Garoth and Alicia, including giving the knowledge on how to open a rift to the Sea of Chaos...
Brain Uploading: Jail and Uno had uploaded a copy of their memories and personalities into Nove's Gun Knuckle, and that copy uploaded itself into Nove's Jet Edge Device when she got it. The program representing those memories slept and only awoke when Nove personally fought a Mazoku.
What Garoth did to Nanoha would leave lasting mental scars on her.
Breast Expansion: Through the natural method of growing up, as Vita is experiencing. Hayate wonders how big they'll get. As of the Red arc, Vita is a head shorter than Signum with breasts as large as Shamal's. And she's only biologically 13.
After getting a small power boost of black magic, Levi enlarges her host body's chest in order to have the bust size she originally had.
Breather Episode: After dealing with Valgaav, Riksfalto, Sherra, and the Golden Dragons trying to kill off Nanoha, the group stops and has a Fanservice-filled rest stop at a local village.
Amitie fully expected Kuma to use her and throw her away when they entered the Hot Springs. He just calmly talked to her about it and swore not to let Levi use them like she planned... he still got a Raging Stiffie, but didn't act on it.
Lina Takamachi: We ended up going on vacation... And had to save every universe.
Butt Monkey: There's a bandit on the Red World that gets blown up by a Takamachi female when she drops in from the Blue World. Nanoha blows him up in the New arc. Lina blew him up in Peek. Vivio blasts him in Revolution.
Came Back Wrong: Alicia is revived as a Mazoku, and becomes one of the most villainous female characters in the story. How villainous? Precia has to save Fate from her.
Canon Welding: The Nanoha-verse is one of the four staff worlds in the Slayers multiverse. The Blue World (home to Chaotic Blue and the Blue Dragon God), to be specific, whereas the Slayers-verse is on the Red World.
Cast from Lifespan: Lina reveals that while she has unlimited magic and can freely use the power of the Lord of Nightmares, doing so causes her body to start to break down and starts to kill her after awhile. However, her lack of stamina in "Try" was mostly because of her pregnancy, which may have had something to do with it.
Character Exaggeration: Sein is a lot more perverted in this story than in canon. To the point where she's openly groping Tre while others are watching and sneaks into Tre's room while the latter is naked on her bed.
Not only Sein, Fate and Arisa got their pervy-ness amped up to the point of willingly going together TOPLESS to Yuuno's room in order to play a prank on him by squeezing their assets on his face. Yeah, we're talking about thatFate and thatArisa.
Chekhov's Gun: After seeing the Starlight Breaker for the first time, Lina wonders what it would be like to use the Dragon Slave against that spell. Then in the Try arc, the corrupted golden dragon elder uses the Dragon Slave against Nanoha, who counters with the Starlight Breaker. The resulting collision between these two spells is not something you'd want to stick around for.
In the first arc, Miyuki mentions wanting a magic sword, and Lina said only if the Sword of Light shows up. In the Shine arc, Sirius comes visiting, leaving all five Dark Star weapons in Lina's custody, and Miyuki claims possession of it.
Cool and Unusual Punishment: Uno decides to force Quattro to watch three hours worth of Barney & Friends for over-the-top teasing of Tre's figure. Due to Quattro sharing a body with Levi, the punishment was horrifying in their opinion. And this is with Uno not even knowing about the Mazoku in the Numbers' ranks.
Continuity Nod: Remember how Nanoha chanted the Shining Finger chant when charging up the Starlight Breaker in Season 1? It comes back with a vengeance in the Red and StrikerS arcs, this time with Reinforce Zwei and Hayate doing it respectively.
Contrived Coincidence: Sein's job was to enter the TSAB and observe their tactics. She does so by enrolling, and somehow by chance becomes Subaru and Teana's roommate. Then by chance, Subaru and Teana meet Nove and Wendi, both undercover as civilian and familiar, and then later Quint meets all three. Nove resemblance causes Quint to confront Regius, leading him to confess her everything about the combat cyborgs, Jail, and his relationship with the TSAB.
Death by Adaptation: Dynast Grausherra, who tried to cheat death by taking over his general Sherra, but Zelas prevents him from overwriting Sherra's mind.
Jail and Uno were killed by Levi when she decided to to go full throttle on her plans.
Deal with the Devil: The Golden Dragon elder under the Fire Dragon Lord, along with his loyal followers, make one with Dynast Grausherra in hopes of gaining the power to kill the last Ancient Dragon. He's a plain Hypocrite, as he accused Lina of doing the same earlier with the Lord of Nightmares.
Vita and the other Wolkenritter made a similar deal with the Book of Darkness. For extra power, they would become its Guardian Knights upon their deaths. It didn't work well, as Signum was shown murdering Vita shortly after Vita got her powerup.
And now that her plans have been derailed and she's been weakened once more, Levi has struck up a lasting bodyguard deal... with Curren Huckebein. The other Huckebeins followed, except for Cypha and Arnage, with the former preventing the latter from doing so.
Both commented on in the story between her and Signum, as well as justified as she lost a major amount of power that came with being purified and can only access her strongest powers while combined with Hayate.
The second point is also justified because her mind was being assaulted and she was having trouble focusing.
After being brought back to life, Luna Inverse has found that she no longer has Holy magic at all.
Death World: Non-administered World 500, aka the Slayers world, is marked with a SS threat level.
(Zest) fought back the urge to get annoyed with them, they were justified in being worried about what he requested, since most everyone in the Bureau was, in fact, restricted to going to this planet. When the ship shook slightly, he closed his eyes and waited for a moment. The planet he was going to was described as the most dangerous of all worlds, and frankly, that was what he needed. Sitting around or trying to go on vacation didn't really suit him, being able to fight and not think about stuff suited him more.
Deus Exit Machina: Lina's pregnancy keeps her from being physically active in the events of Shine, and places her in just a advising role, allowing the plot to focus back to most of the Nanoha-verse cast as they deal with the new reality.
A more sinister version has Luna killed off-screen and Nanoha nearly killed, requiring Lina to get Nanoha out of the area so she can focus on stopping Nanoha's rampant Chaos magic from doing more harm than good to her body.
Double Knockout: In what is supposed to be a Lighthearted Rematch between Nanoha and her friends and the Yagami family, Nanoha and Hayate went all out for their final attack of the battle. Nanoha, channeling her Chaos powers, and Hayate, unisoned with Reinforce. Only then did they KO'ed each other, destroying the entire training grounds in the process.
Dramatic Irony: Jail's goals now involve getting enough power to deal with a Mazoku threat, knowing there are others. He doesn't know that one of his Numbers is being possessed, and then later corrupted by a Mazoku.
Also Jail's plots involve making the TSAB take the Mazoku threat seriously. He doesn't know that is the reason the Riot Force was founded.
After her injury at Cinque's hands, Signum has taken up dual-wielding as well, first with a Shine Sword, and later a duplicate of the rebuilt Laevatein.
Early-Bird Cameo: Quint and Megane appear at the beginning of the Jump arc with their children (Ginga, Subaru and Lutecia respectively). Zest and Regius are seen helpless against Death Bringer Garoth's takeover of the TSAB's Ground Forces HQ.
The newest arc Shine glimpses at the birth of Caro and the creation of Erio. Jail also appears with Uno, Due and Tre seeking information from Precia. Some of the other Numbers soon follow.
As of Peek, practically everyone through StrikerS other than Otto, Deed and Vivio.
Caro got REALLY lucky when she met what seems to be the Huckebein.
Ixpellia shows up in one of Nanoha's dreams while she's in a coma.
Enemy Mine: Nanoha, Fate, Yuuno, and the Wolkenritter team up during what was the second canon battle when Alicia decides there isn't enough bloodshed and summons a horde of minor demons.
Huraker's claiming of the Water Dragon Lord's powers from Lyos has her facing Riksfalto, Valgaav, Zelgadis, Yunno, Fate, Chrono, and the Shinzoku Erulogos together.
Fanservice with a Smile: As part of Lina's deal with the inn her group was staying in, Amelia, Syphiel and Filia were made to work as waitresses. The latter three did not appreciate this.
Fish Out of Temporal Water: Even if she was thrown less than 20 years back in time that's how it felt like to Lina when she ended up on Earth, a different planet with technology centuries more advanced than the Red World's.
Foreshadowing: A rather neat and subtle one happens in chapter 8 where Lina thought that if Yuuno had been on her home world, he would have been called the next great sage. 32 chapters, 3 arcs, and one in-story year later when on Lina's home world, both Shinzoku and Mazoku are calling him the fifth great sage.
There are hints as to why Lina's fighting ability seems to be weaker than what it should have been on her home world. At the end of the Try arc, she reveals that she's pregnant.
The unnoticed glow around Erio and the dragons roaring just as Caro was born seems to hint these two will have something special on top of what they have in canon.
The Lord of Nightmares later implies that they might be the current reincarnations of Dugradigdu and Vorfeed.
Xellos explains to Rangort how Mazoku possess human bodies in order to mate with humans and produce half-human, half-Mazoku offspring, and it's done rarely. Immediately following that, Zelas appears, and then explains that Xellos was the result of such a pairing between her and a human male..
For Want of a Nail: In the novels, Luke-Shabranigdo knew that Mazoku was responsible for Milina's death, and so gave Lina and Gourry the opportunity to kill him, even granting unlimited magic and stamina. In the fanfic, Luke was only told that bandits killed Milina. Without realizing that it wasn't humans that killed his beloved, his soul was consumed by Shabrangido.
On a lighter note, during the airport fire, instead of Subaru being rescued by Nanoha, she was rescued by Yunno.
Zest and Quint's survival puts Regius on a more The Atoner path than in canon. As a result, Riot Force is mostly his creation.
Friend to All Children: Lina, who brings stuff to an orphanage for abused children every month. Mostly an extension of that side of her that existed in the original canon.
In Dusk, it's Regius of all people that snaps Zest out of his BSOD.
In StrikerS, during the Nanoha vs Saint-King!Vivio, Nanoha does this to calm Vivio down when long repressed memories of Olivie's last moments before Garoth killed her threaten to drive her insane.
Girl on Girl Is Hot: Invoked by Fate and Arisa. In order to get back at Yuuno over a joke he played on them. They walked into his room, topless, dyed his hair a variety of colors, before pressing their breasts together and making out while Thoth recorded the whole thing. This was to keep Thoth from telling Yuuno what was going on. Upon viewing it, it was enough to have Chrono need some relief from Amy and Filia.
And speaking of Amy and Filia, they did tease Chrono the same way.
Go to Your Room: Lina says this to Luna, expressing her displeasure on how Luna failed to protect Arisa and Suzuka.
Good Parents: The ones who were adults at the start of the story, Lindy, Genya, Quint, Lina, and Shiro are this to the younger members of the cast.
Said younger members, Nanoha, Fate, Hayate, Yuuno and Chrono, become this, when they grow up, to the younger children that come into their lives.
Jail is this to the Numbers while he's still with them. The Numbers are later split into different families with Good Parents of their own, except for Tre and Sein, who go to work for the Saint Church.
Good Thing You Can Heal: Cinque reveals that she has gained regenerative powers and uses them to their fullest effect, standing near a nearly lethal explosion without using a barrier, cutting her own throat to escape capture and grabbing Laevantein and using her Rumble Detonator skill on it to blow it up and take her hand out in the process. Signum wasn't quite as lucky.
Happily Adopted: Fate gets adopted not by Lindy, but by Lina, making her and Nanoha sisters.
Has Two Mommies: Reinforce Zwei and Vita. At the moment. The Vivid Arc adds Hayate's new daughter Kyouka.
Gourry in the aftermath of the battle against Hellmaster as he believed Lina was dead.
Fate when she learns Alicia was resurrected as a Mazoku.
Nanoha, after being tortured physically and mentally by Garoth.
Heroic RROD: Towards the end of the Red Arc, Nanoha gets stabbed while actively using her chaos powers. It's also why she survived, even if she was in a coma for months afterward while her body recovered.
Holy Hand Grenade: It turns out Raising Heart's is a holy-elemental artifact, and therefore capable of hurting Mazoku. It gets more interesting when Nanoha can cast boosted Dragon Slaves through it...
How Do I Shot Web?: Seems to be a trend for humans when trying to wield holy magic. It was apparently a tough time for Luna Inverse, who couldn't wear clothes because her power kept burning her clothes off until she got a handle with it, and she had no one to teach her.
Humanity Ensues: After drawing from Nanoha's Chaos-infused Linker Core, the Wolkenritter were transformed from being magical constructs into actual living breathing flesh, their ties to the Book of Darkness severed, and now mortal.
Humiliation Conga: Levi, at the climax of the StrikerS arc, has been betrayed by her own Priest, blasted by a Divine Buster, had Reinforce, Lutecia, and Vivio taken away, had her evil ass kicked by Kuma, whose armor form is actually able to harm Astral bodies, and currently been outmaneuvered and on the path of a Villainous Breakdown...and Lina Inverse is there too. It takes a Deal with the Devil with Curren Huckebein to stop it.
Intoxication Ensues: Someone spiked the punch at a party and it led to Fate having a Heroic BSOD about her feelings when it comes to other girls and Yunno, and Vita losing her virginity.
Intrigued by Humanity: Mazoku Lord Lucefer. This is what gets him marked as a traitor by his fellow Mazoku, especially after he gave away knowledge on how humans can fight Mazoku. Despite their efforts, he is still alive... for the present term.
I Want Grandkids: Well, even though Lina already has a family, Lina's parents are bugging her sister Luna to get married and have kids. Which is going to be impossible since Luna's into girls.
Lamarck Was Right: Nanoha's magic potential is stated to be because of her mother having a tremendous amount of magic.
Suzuka is revealed to have powerful anti-Mazoku abilities because it was passed on from her ancestors. Justified in that her ancestors were experimented on and made into weapons to fight against Mazoku and the powerful abilities would be passed on throughout the generations.
Xellos, after his month-long tryst with the Earth Dragon Goddess Rangort, has twin girls, both of whom have Holy and Black Magic radiating from them.
It is later revealed that during the Garoth crisis, Jail had Due get the blood of Lina and Nanoha, isolated the DNA that related to their magic, and implanted into Cinque and Dieci. He later realized that particular magic is not to be worked with lightly.
Leeroy Jenkins: Signum rushed at Cinque despite (or perhaps because) sensing Chaos magic in the already dangerous cyborg. Needless to say, things didn't end well for the Blazing General.
Living Battery: The Megahs are powered by Unison Devices. In this story, that is how Agito was discovered. However Unison Devices get turned into Empty Shells once they are hooked up. They are only able to regain a form of personality if they Unison with someone for a long time. But there is a limit to how long they can remain hooked up to the Megahs because once removed, they cease to exist.
Loads and Loads of Characters: So much so that by the time that the Try arc gets done, most of all the canon Slayers characters were used, on top of the canon Nanoha cast from season 1.
Luke, I Am Your Father: As far as Xellos knew, he is like all Mazoku, created from their immediate master's severing part of their astral body off and shaping it into a new individual Mazoku. However, Zelas reveals that she is his mother in the traditional sense, and that he had a human father. After he was born, Zelas purged his human side and made him a full Mazoku (for Xellos' safety), only later giving him the power that made him one of the more powerful servants of the five Retainers. As for the father, he was killed by Dynast.
Nove learning she's related to the Nakajima family. And on the other side, Subaru learning that Nove's her sister.
Luke, You Are My Father: When Reinforce Zwei introduced herself, she calls Hayate "Daddy", especially since Reinforce was made pregnant with Zwei as part of the creation process, and that both Hayate's and Reinforce's Linker Cores were used. This scene was pulled from another crack short Nanya wrote.
Arisa: Hayate's not even 10 years old and has a child of her own, and she's the father? Argh! You magic people throw everything out of whack!
More dramatically, Zest being told that Lutecia is his daughter, after hearing the news of Megane and Lutecia's deaths. He doesn't take it well.
And on a sillier note, Rangort introducing Xellos to his daughters.
Lina's status as a Mama Bear was never in question, but if anyone forgot about it, all they have to do is look at Lina's reaction to finding out about her children and grandchild nearly getting hurt.
"Shiro, get some pants on, someone tried to kill our family."
Mayfly-December Romance: Filia is a century-years-old dragon, and the youngest of her race. Chrono and Amy are just approaching adulthood. Filia has a sobering moment regarding this in the Advice chapter of Peek.
Meaningful Name: Arashi means storm or tempest. Fitting as he can use Chaos Magic naturally with no ill effects.
Hayate names her new daughter Kyouka, which can mean "reinforce".
Minion with an F in Evil: Xellos really does not understand Earth's socioeconomic or environmental patterns, so he keeps trying to create misery, and ends up a town hero. Like killing a warlord. Or turning a diamond mine into a coal mine. Or blowing up a port that turned out to have been a Wretched Hive. Or killing all the rabbits inAustralia.
Mirror Match: The infamous Shadow Reflector, once destroyed by Lina Inverse, is repaired by the Mazoku conspiring in the Kingdom of Dils. This time, it does create an evil twin, and they use it on Zest.
One of the external signs of Lina being 'marked' by the Lord of Nightmares is her left eye being gold. She covers both of her eyes with a glamor to hide it, making them both blue like the eyes of Momoko Takamachi.
Cinque has one normal eye and one literally black eye, formed from Chaotic energy.
Mood Whiplash: Many. One notable event was the end of the Shine arc. From the birth of Lina Takamichi's son Arashi to the Sudden Downer Ending of Precia Testarossa's death and funeral.
Moment Killer: Filia comments that she and Chrono were interrupted when Amy asks why Chrono seemed upset.
The Mutiny: While they've made it clear that Hayate is Still The Leader, they've had her step down as commander of Riot Force 6 due to her emotions overruling her decisions and placed Chrono in charge.
Mythology Gag: Nanoha sticking her head into the kitchen at the Midoriya Cafe causes all fights to stop.
Mazoku-Alicia's disguise is based on Material-L from TheBattleOfAces . She later adopts Material-L's new name Levi found in the game's sequel The Gears of Destiny.
Reinforce reverse-unisons with Hayate at the end of the battle with Death Bringer and gains the look she had during the final fight in the PSP game.
A confrontation with the corrupted dragon elder get Nanoha's hair partially burned off, leaving her looking like Material-S.
Even earlier than that, Nanoha's new spell Divine Flame Buster can be seen as a Material-S shout-out.
Lina gets one when she comments on how she's glad that Fate's not being arrested for being herself and wonders if that might have happened if she stayed on her own home world. Guess what happened in the fourth season of Slayers?
Lina tells Gourry she's selling him the Blast Sword for 550 – the same price that she had originally offered to buy the Sword of Light for when she first found out Gourry had it.
Hayate, thanks to Reinforce being around, has spells and abilities of both her canon self and how she was in the PSP game.
Luna musing on how the Staff of Bones, a weapon made from Shabranigdo's own body, might be able to withstand the Blast Blade. That's what happens in the final Slayers Light Novel, when Gourry, armed with the Blast Blade, fights Luke-Shabrangido who is wielding the Staff of Bones.
Never Live It Down: In-Universe application. When Sirius, one of the Shinzoku under Vorfeed, is beamed aboard the Arthra, he asks if the on board chef routinely blows up the kitchen while cooking, remembering Vorfeed's time as a spaceship included such incidents.
Nice Job Fixing It, Villain: Outside of using the Giga Slave or an Arc En Ciel bombardment, there was no way for the defenders of Seyruun to be able to defeat a fully awake shard of Shabranigdo. Then Shabranigdo decided to send in a resurrected Gaav, with some of Gaav's memories modified of course. By chance the heroes manage to unseal Gaav's memories, causing Gaav to revert to his original goals of rebelling against Shabranigdo. Doubles as a Hoist by His Own Petard.
Nocturnal Emission: Poor Yuuno. He's incredibly embarrassed about it, but Kyouya tells him that it's perfectly natural and normal for boys his age to suffer through it. He tells Yuuno to pack more underwear when going on trips in the future.
Noble Demon: Jail's goals now involve reminding how bad Mazoku are, even if he's seen as a villain.
Noodle Incident: Just before Lina is about to reveal her magical talents to Nanoha, Lina assures Shiro it won't be like that incident in China. The trope is then averted in the New arc, where Lina explains that a bodyguard job ended with a mountain and part of the Great Wall of China vaporized when Lina decided to test her Nemesis Breaker spell on the demon that was after their client. It is also hinted she did something to the Clover group for what they did to Shiro.
This trope is FURTHER averted in the Red arc as Lina tells Luna exactly what she did to the Clover group.
Whatever Dynast did to Zelas in the past is never fully explained. At least... until the Red arc.
Lina mentioned several more incidents involving the Pope, mecha-piloting Leprechauns, and Oompa Loompas during her European honeymoon (the latter two also serving as a Shout Out to Gold Digger).
Not Blood Siblings: Fate being adopted by Lina doesn't keep her from having a relationship with Nanoha.
Not So Different: While standing near one of the sites of the Holocaust death camps, Xellos remarks to Sirius that Mazoku and Shinzoku are both reliant on humans for survival.
Obfuscating Stupidity: A number of characters come across far less dangerous than they really are upon first glance, notable is Lina (who's a lot more mellow than she was in canon), Nanoha (who's seen being mischievous quite often), Reinforce Zwei (who's so incredibly cute, bubbly and energetic that you want to take her home), and Caro (who's so cute that people say is too cute sometimes.)
Vita probably takes the cake by the StrikerS arc, simply because she'd rather be out partying, going on dates, having fun with said dates, riding her motorcycle and generally relaxing. Despite this, she's arguably the strongest mage in the Riot Force physically, is quite willing to provoke her friends into a sparring match where she's at a disadvantage, and has enough raw sexuality to make someone who disliked her suddenly start crushing on her.
Exemplified in the Red arc where Luna's inaction could have cost Arf, Arisa and Suzuka their lives. Instead of losing her temper at Luna, Lina dismisses Luna and later takes her to a place where Luna can see the potential results of her actions.
Our Zombies Are Different: The Mariage are undead women who look completely identical, can morph their arms into various weapons, move so fast that even augmented humans have a hard time following their movements, cut down barriers with ease and explode when they've had enough.
Outside-Context Villain: The TSAB were blindsided by the appearance of the Mazoku of their universe, mostly because the Mazoku kept their involvement a secret as they brought down the precursor civilizations before them.
More specifically, Garoth is this in the A's arc for the Nanoha side of the cast. His Dragon is a bit of a subversion, as the end of the arc reveals she's Alicia Testarossa, who Came Back Wrong.
The inverse is expected to hit Levi hard, with increasing involvement of Mazoku and Shinzoku from the Red World as well as Dark Star and Vorfeed reborn on the Blue World.
Plot-Relevant Age-Up: Levi artifically ages Lutecia while she's in a tube. By the time she awake, she's a six-year-old with a teenager's body.
Polyamory: It was Filia who push for the three-way relationship between her, Chrono, and Amy. The same Filia who first thought of Chrono as an unrepentant pervert.
Yuuno's relationship with Nanoha, Fate and Miyuki, to the point where they're all living in the same house and raising Erio, Caro and Vivio.
Premature Eulogy: Lina returns to her home world only to here that Seyruun just held a funeral for her, and finds her family holding a wake for her. She does admit, though, given that she had been consumed by the Lord of Nightmares, no one should have expected her to return alive.
Put on a Bus: Every main character in the Dusk arc, allowing the author to explore the minor and secondary characters more.
Rape Is a Special Kind of Evil: This is definitely played straight in universe. As mentioned above, Quattro/Levi was already looked as no quite right by the other numbers, Duo beings to get even more suspicious as Lutecia spends time with her, and acting like an overly devout servant. This gets cemented in the fanbase when Levi, now fully possessing Quattro, rapes Reinforce Eins into a state of obedient catatonia.
Reality Warper: The high-ranking Mazoku in general, but special mention goes to Death Bringer and Huraker.
Red Herring Twist: Initially it looks like Lina will be able to revive Alicia, but then a few scenes later we learn she failed. Then subverted when we learn Alicia was already brought back...as a Mazoku.
Retired Badass: Lina was content to just settling down and run a business like her parents, especially in a world where few things needed the use of her magic. Then the Jewel Seed incident happened...
Revenge by Proxy: Valgaav was convinced to target Nanoha instead of targeting Lina directly. Unfortunately for him, Raising Heart had a new upgrade that made Nanoha a not-so-easy target.
Roaring Rampage of Revenge: It was revealed that after the incident that sent Shiro to the hospital, Lina decided to kill every known member of the Clover terrorist group. Part of this was misplaced guilt that she could have done something about them after the attack on the Fuwa clan reunion. Needless to say, several hundreds died at her hand within a span of a week. This was the last time she lost control of her temper.
Running Gag: Lina's now modest breast size being felt up or commented on while back in her world.
Mr. Snuggles, the world's most unlucky cat.
He's now considered the most awesome cat in the world after Jail turns him into a cybernetic familiar for Sette.
Thoth's perverted comments and Yuuno's reaction to them.
COWS! Poor Dieci.
Schedule Slip: Comparatively speaking, when the author was posting at his peak, he was getting two to three, and sometimes up to five chapters a day done. The posting speed has dropped to maybe two to four times a week at best.
Sealed Good in a Can and Sealed Evil in a Can: The Blue Dragon God and Chaotic Blue sealed each other away. This is the biggest problem with Garoth's plan, as it hinges on that the pillar he found actually contains his master and not his master's enemy. He is killed without succeeding in getting the pillar broken, so nobody knows for sure.
Quint pulls off a Hell and Heaven against Nanoha in a training match and later again when she and Megane are under attack from a Mechanical Monster. Guess now we know who Subaru inherited her title from.
A rather unusual one that doubles as Actor Allusion, but Arisa Bannings, when using her Holy power, has blue wings and a sword made of blue fire, allowing her to fly and fight against Mazoku. If you colored her hair red and turned her flames red, she'd be Shana.
In Red, Signum's fight against a rather powerful opponent is a Shout Out to Mazinkaiser's battle against Baron Ashura from the OVA.
Yuuno, of all people, pulls out a move that would have Kamina and Simon smiling proudly.
Corona's Goliath is renamed Balmung in the Revolution arc, but it now has a Scrander to help it fly.
Shower of Awkward: Early in the Red Arc, due to a lot of steam, Yunno thinks the bath is unoccupied, when in fact Miyuki was in it. Yunno quickly thinks he's going to end up hurt. Instead, it seems to spark Miyuki's interest in Yuuno.
Reinforce does this to Vita, seemingly taking the role of Team Mom literally in the Yagami household (outside of being Zwei's actual mother of course).
Then she does it again, due to events of the Red Arc. Vita really shouldn't have decked Reinforce.
Something Only They Would Cast: Lina proves to her parents that she isn't a Mazoku doppelganger by casting a Dragon Slave. Mazoku can't call on powers higher than themslves as it would be admitting they are weak and therefore end up absorbed by the Mazoku they are trying to call upon.
Couldn't she have used a Ragna Blade or something, instead? Same principle, only it would have had less collateral damage.
Spared by the Adaptation: Precia, who is taken into custody after being introduced to Lina's Nemesis Breaker spell, a Dragon Slave variant that calls upon the Dark Lord Chaotic Blue. She ends up dying at the end of the Shine arc, and after that given a proper funeral, a funeral that even Jail attends. And even then it is not the last time we may see her. See Irony above.
Reinforce, after Lina purges the device of the corrupt defense program. Despite this, Reinforce Zwei is still created as the original can only safely Unison with Hayate now. This almost becomes subverted in the Striker(s) arc when Reinforce seems to get killed by Hayate for good.
Mazoku generals Riksfalto and Sherra, who died in the Aqualord manga and novels, respectively.
In Sound Stage X, while Ixpellia doesn't die, the original canon had her fall into a regenerative sleep from which she wouldn't awake for a thousand years after the incident. The fanfic instead has Arashi infuse her with Chaos energy. As a result, she is now living with the Saint Church. The affects of being energized with Chaos, however, have yet to be truly explored.
Slap-Slap-Kiss: A more literal example: after Teana destroys a couple Megahs with Sein's help, she immediately turns on Sein and punches her twice and slaps her once for her betrayals, then kisses her for saving her in the first place from the Megah. And then arrests her.
Spotlight-Stealing Squad: The Nanoha cast compared to the Slayers cast, barring Lina. And among the Slayers-verse characters, the Mazoku compared to everyone else. This is due to the fact the remaining human cast of Slayers only show up in Slayer-centric plotlines so far, and there is not much in terms of Slayers plots to adapt, barring the REVOLUTION and EVOLUTION-R storylines, while most of the post TRY arcs have been focused on the buildup to the fic's version of StrikerS.
With the REVOLUTION season being adapted, it looks like the Slayers-verse characters are going to be relevant again.
Suicide Mission: Going up to fight a high ranking Mazoku, or worse, one of the Demon Kings like Ruby Eye, is pretty much suicide.
Worse, the TSAB has a mission classification for this, showing that they have dealt with such missions in the past. Its classification: X Class.
Super Mode: Nanoha's Assault Mode, which can safely channel Nanoha's internal Chaos powers for about five minutes, and Fate's Rubin Blitz form, both designed to aid in combating Mazoku. Quint and Zest's Devices were updated with a new Blast Mode armor form, with the material derived from reverse-engineering the Blast Sword.
Super Speed: Straight Kuma (Cougar), whose ability is the same from Scryed, running so fast he turns the ground to glass and is faster than Fate. Although if he overuses it, he can't walk right for a while.
Surprise Pregnancy: Well, Xellos and Rangort weren't expecting daughters between them, given how their specices actually procreate, much less procreate with each other.
In a darker moment Garoth reveals that the Saint Kaiser was pregnant with Klaus' child. Emphasis on the 'was' as he terminated said pregnancy before ending the Saint Kaiser's life.
When Hayate is introduced to Reinforce Zwei (who calls Hayate her father, no less), she promptly faints. To be fair, Reinforce was also certain that Unison devices couldn't get pregnant.
At the end of the Red arc Amy and Filia reveal that they are both pregnant with Chrono's children. Chrono had the same reaction as Hayate.
After Quint has the Chaos energy removed from her body, she discovers she's now pregnant. It's implied that her desires for children that she actually conceived directed that energy to repair her reproductive organs.
At the end of SSX, Hayate gets surprised again, although this time she's the one pregnant! How that happened isn't explained, but probably has to do how she was Unisoned with Reinforce for quite some time after the Cradle incident.
The Internet Is for Porn: Played for Laughs when Einhart explains how she managed to use transformation magic to turn herself into an anatomically correct male for the purpose of fighting random people in the streets.
The Maiden Name Debate: Instead of taking the last name Takamachi, Fate decides to take Lina's maiden name when being adopted.
The Mole: Sein, with Due already exposed back in the Shine arc, and unable to fulfill her canon role. This time however, Sein is roommates with Subaru and Teana.
There Are No Coincidences: Lina's opinion on continuous events happening around her life. Justified by having met and interacted with the Lord of Nightmares several times: as an example Lina was thrown over a decade back in time, just enough time for being back to her homeworld when the fusion of Dark Star and Vorfeed is arriving to the Red World so she could kill them and eventually have their reincarnations/seals join her family as adopted grandchildren. The fact that L-sama has admitted to having fun watching Lina's life and its repercussions only reinforces that opinion.
Lampshaded in Vivid, when Fate learns about a prophecy that seems to talk about Vivio, Einhart, and Ixpellia.
It also appears that Arashi was included in that prophecy if the term "Scion of Gold" is applicable due to his natural use of Chaos Magic.
The Reveal: Death Bringer Garoth's priestess being Alicia at the end of the A's arc.
The Slow Path: As it turns out, not only Lina was sent to another world, but sent back in time as well. Had she managed to return to home universe on her own, she would have found herself in her own past.
Throw the Dog a Bone: Zelgadis learns how to temporary take on a human form from observing Arf's shape shifting. His chimera body is his true form still, but it's closer to a cure than he's ever had before.
Time Skip: The Red arc has a two year time skip, jumping to when Nanoha is 14.
Token Evil Teammate: Quattro due to Levi's influence. Already couple of the other Numbers feel something's wrong with her, and some are harbouring thoughts of doing something mean to Quattro without feeling guilty about it. She solidified it by helping to kill Jail and Uno.
Took a Level in Badass: Yunno having learned Shamanistic magic and Resurrection, as well as nearly killing Riksfalto with a modified Ra Tilt, earning him an audience with Vrabazard. Since then, those in the know are already calling him the next Great Sage.
Arisa and Suzuka are both capable of harming Mazoku, though for different reasons.
Even the canon badass characters from Magical Girl Lyrical Nanoha take a level and become even more so.
Too Much Information: Lina is not amused when Xellos talks about his unintended conquest of Rangort with unnecessary details, especially in front of 12-year old Fate.
Touched by Vorlons: Not only did the aftermath of the Hellmaster incident tossed Lina through time and space, but a fragment of the Lord of Nightmare's being is infused into her soul. Nanoha has her own fragment, having inherited from her mother, and Hayate and Reinforce got theirs when the Book of Darkness drew from Nanoha's linker core. Nanoha's younger brother was also infused with L-Sama's essence as well, with Lina casting the Ragna Blade and attempting a Giga Slave during the first weeks of her pregnancy.
The Unfettered: When Chrono is put in charge of the Riot Force, he orders Nanoha to take down the Combat Cyborgs by any means necessary as they couldn't take any more chances. Levi returning actually helps by forcing an Enemy Mine.
Cinque goes through this herself when Zest injures Due and Tre.
Events in the story hint that having some of the Lord of Nightmares' Chaos energy enhances a person's rage, causing the person to become a berserker if left unchecked. Nanoha, Cinque and Dieci have all suffered this.
Unskilled, but Strong: Suzuka is revealed to have some sort of superhuman strength and magical power and it was recently revealed that she could beat Vita; however, the exact details of such a victory are unknown as the author has specifically stated that there was no context to the win and they could have easily had been arm wrestling.
Was Once a Man: Reinforce Eins used to be human, before becoming the corrupted Living Weapon. Levi's Evil Plan involves discovering this process, so she can mass produce Unison Devices for her army of Megahs.
Well-Intentioned Extremist: Jail created his Numbers while planing to fight against Mazoku. Had this been revealed to the protagonists even earlier, they may not have to fight each other.
Wham Episode: ViVid suddenly ends when out of nowhere a being, either a Mazoku or Shinzoku, forcably teleports the kids and Nove to another world (later revealed as the Red World) just as the kids were about to join the mock battles with the adults.
Worf Barrage: While present in both series, the fanfic takes it Up to Eleven when Dark Star survives an Arc-En-Ciel blast.
You Are Not Alone: In the battle against Garoth, Lina finds herself nearly beaten, when she imagines her old True Companions telling her to not give up, since that was never her style.
You Can't Go Home Again: Filia chooses to leave the Red World, believing there's no place for her there anymore due to her actions and the actions of her clan. Lindy allows her to stay with her on Earth.
Death Bringer Garoth:You people, who have lived here for years in relative peace, know nothing of the terrors as society falls, crumbling away to dust. You think that your precious Bureau can protect you, and yet, your precious Bureau is completely helpless against me. So, just sit back, relax and enjoy your last few moments before I destroy your entire world. Oh, I know you don't believe me, so, how about a small sample?