Working on some Nanoha fanfiction

The time traveler herself is an original character, a TSAB mage trained in Nanoha's instructor class and is part of her escort squad during the opening battle in the story.

Originally I toyed with the idea of using one of the Vivid girls like Einhart or Corona, but I felt Einhart would be way too strong. So I flipped back and forth with either Corona or an original character and decided on the original character since it'd make more sense for her to be in the right place at the right time rather than a full-on civilian like Corona.

Basically the opening scene involves one of the established characters(potentially either Teana or Nanoha herself) being the one chosen to go back in time 15 years. Our original character(possible name: Vectra) is part of the squad that's meant to escort our hero to an offsite transporter to rendezvous with a special operative only known to them as Hades, who has access to time travel powers that's been kept secret from all except a select few in the TSAB command. However, enroute to the rendezvous, the group is discovered by the entity destroying their world(possible name: The World Eater. An entity that was thought more myth than reality, with limited information known about them except they appear at times in history to bring ruin to worlds.) The battle quickly goes sour with most of the escort being wiped out, and our hero is mortally wounded. Making a last stand to buy time, she orders Vectra to go through the transporter in her stead.

No worries on that, Vectra isn't going to be the character the story revolves around; the cast is going to be rather large so I think it'd be detrimental to focus too much on any one character. Vectra's main role is to bring attention to the threat of the World Eater; after the opening scene, she's not even going to be part of the story until a bit later on. The outline I've got so far has the characters split into several groups the story follows - not unlike route splits in SRW - until later on when they join together to properly face the enemy groups. The first group is primarily around Nanoha herself, along with obviously Yuuno, and Kyoko from Madoka. The second group is the Sailor Senshi along with Vectra, and the final group is the Madoka cast. All three groups also have other characters joining their ranks later on in the story as the conflict grows and becomes more dire.

A bit of a spoiler alert, but the first dimensional quake that Nanoha and Fate cause ends up being a more significant problem in this story, as dimensional tears open doors to certain other worlds, where I'm planning to have characters(and their respective enemies) from other magical(and not-entirely-magical) series come from, mainly Strike Witches and Touhou, but potentially other series like Date A-Live, Slayers, Youjo Senki, Precure, etc.

Balancing a large cast is definitely a challenge; one of my solutions is that several series will only have a couple characters involved due to being pulled through the dimensional tears. Another solution is Sailor Moon will mainly take place during the original season, as will Nanoha, so that also keeps the cast from getting too extreme.

Moving on, as despite all this the Super Magic Wars story is probably not going to be the story I do first, rather the DragonballxNanoha one as I have a bit more stuff fleshed out for it, plus juggling two series is much simpler than four or more.

Right now my plan is to cover it in three main chunks; the first covers the fight with Raditz(which Nanoha and Yuuno get involved in,) the events of Nanoha A's(where certain Z Fighters get involved,) and the year of preparation for the arrival of the Saiyans. The second is the battle with Vegeta and Nappa + the TSAB hunting for Dr. Gero's lab, and the final arc covers Namek(which will end up going quite a bit differently since the Nanoha characters will be involved.)

Oh yes, and I have plans for that. Vegeta is gonna be no stranger to magic or the TSAB.

One problem I've had with some Nanoha crossovers is they make the Nanoha cast kinda infallible or invincible and have them fix all the "mistakes" with the other series or simply crush the opposition. That's not going to happen here; for example, Nanoha and Yuuno are going to have a rather rough time fighting Raditz(especially since they are still the first season versions,) even alongside Goku and Piccolo. And the fight with the Saiyan pair later will be disastrous, because Vegeta is no fool and comes prepared.

Of course, this also swings back around again, in that the Nanoha cast is now being introduced to a world that heavily uses Ki energy.

If that's the White Devil of the Moon you're talking about, I think that's one of the only ones I liked, but it still had some flaws like reducing several of the Sailor Moon characters to one-dimensional jokes(like poor Luna) and having Nanoha be a little TOO wise about stuff, especially considering this is pre-StrikerS Nanoha. But it did have good moments, like the Senshi misidentifying Fate as a bad guy due to her black Senshi-esque outfit and way she kept them away from Nanoha, and Sailor Venus jumping in to help at the Takamachi wedding battle.

On to two other things; I've been thinking things over and I think I might go with your suggestion about the main character for the Magical Girls crossover. Rather than an original character, I'll use someone such as Corona, or even maybe one of the Numbers, as the main character. Partly because I was browsing Nanoha stories on Fanfiction.net and there's no fics at all about Corona, and very few about the Numbers. Along with someone else, which is my next thing.

There's so little fanfiction about Hayate when compared to Nanoha and Fate! And many of the ones with her as a major character is basically her tagging along with Nanoha and Fate in whatever plot they're getting involved in. I expected someone to have done the whole Magical Girl Lyrical Hayate thing where she has Raising Heart instead of the Tome of the Night Sky.

So mostly what I've been doing is writing chapter/plot outlines and character details. Haven't actually started writing any of the stories quite yet, and I've put some other ideas down to paper that I also want to tackle.

1. A prequel story - like The Phantom Menace to the series - revolving around Precia Testarossa when she was still a young mage, and also covering things like Gil Graham's rise in the TSAB, the previous generations of the Harlaown and Nakajima families, and so on.
2. A more immediate prequel story, about how Yuuno and his clanmates found the jewel seeds, their meeting and interaction with the TSAB officer who they hand the seeds over to, the subsequent attack on the transport by Fate that scatters the seeds onto Earth, followed by Yuuno's battle with the first seed
3. Another Yuuno story, taking place between A's and StrikerS, detailing some of his side archaeological adventures. Some people liken him as a magical Indiana Jones, so I'm gonna run with that idea... and in the course of his adventure, he encounters a certain Dark Fragment from his past.
4. A sequel story to StrikerS, in a sense as an alternative to Force. The story centers on an older world in dimensional space, home to one of the largest orbital shipyards in known TSAB space which manufactures many ships used in Mid-Childa. Due to this powerful asset they have managed to keep their autonomy from Mid-Childa, in a sense only being a semi-administrated world. The conflict arises as long-rooted classism between magic-users and non-magic users cause unrest, as mages form the upper crust of society on this world. In recent years, non-magic users have risen up in pockets of rebellion and terrorism, and the conflict only worsens over time. The TSAB have sent an agent to this world to both observe and assist in dealing with this crisis. It's gonna be either Fate or Teana, have not decided yet but leaning more toward Teana.

Regarding the last idea, this is the one I'm going full drive on right now. Currently just calling it Nanoha Rebellion as a work-in-progress name.

Backstory
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Festus, a former world of the Ancient Belkan Empire, survived the Belkan wars and attained autonomy in a parallel fashion to Midchilda. The two planets soon became allies in the post-war era, neither wishing to reignite the flames of war as Midchilda focused on reuniting several other post-Belkan worlds and stabilizing, while Festus focused inward on developing it's mineral-rich resources and surviving Belkan industrial infrastructure, including the remains of an orbital shipyard. In record time, Festus became an economical powerhouse in dimensional space, controlling one of the primary sources for interdimensional ship travel. Thanks to this status, Festus continued on as a trade ally of Midchilda instead of falling under the protective umbrella of the TSAB.

Due to the lack of direct Midchildan influence, Festus grew in a largely Belkan-centric environment, complete with a feudal-type class system that favored magic users over non-magic users, aka null humans. Over the decades, bureaucracy and gradual corruption saw a divide form between the classes, as mages enjoyed the full benefits of Festus' booming economy while nulls simply didn't. It was not an overt dictatorial decision, but just comfortable neglect and rejection over time.

However, the simmering pot eventually boiled. Dissent and civil unrest became rampant in the suburbs and satellite towns. Talk of violence and even rebellion was heard. Efforts by the Guardsmen - the prominent peacekeeping forces of the ruling Margrave - hardened as such unrest was to be stamped out. In light of this, the TSAB have sent an Enforcer agent to assist the Festian leadership as a show of good faith.

The year is now 0080. In the northern city of Distral, two youths are about to find themselves pulled into the tides of war that have begun to break...
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So in my mind, Belka is an equivalent of the real-life Holy Roman Empire, with its control over multiple sovereign nations(in this case, the various Belkan kings.) Festus was one such nation, a border world that managed to avoid most of the worst infighting in the core nations of the Belkan Empire. So now we have a successor state, that while it no longer calls itself Belka, is largely Belkan in nature.

Right now I have the story framework mostly done, set in three main arcs. The first arc is primarily focused on the new characters and introducing elements of Festus and groundwork for the incoming war. The second arc is when the Nanoha cast really start getting involved, and certain plot threads and conspiracies come to light. Everything will then culminate in the final arc where the differing ideologies and goals of the characters come to clash.

Huh... looking back at what I structured out, I don't have any mention of the Wolkenritter. In a story so focused on a Belkan world, that seems like a huge miss. Time to rewrite!