The serious stories, most notably the story written by Arkado which first appeared on the Spacebattles Creative Writing forum in early September 2010. There is also another story with a similar premise being written by Charles Bhepin, author of Shinji and Warhammer 40k, under the title Lovehammer: The Scattering of Serenity, which went live on FF.net around the end of September 2010. Bhepin cites Arkado’s version as his inspiration.
However, in general Lovehammer begins during the Great Crusades just after the God-Emperor has finished vanquishing the warlords of Terra and united the planet under his rule. Several universes over, the Silver Millennium comes crashing down around Queen Serenity’s ears, and her attempts to reincarnate Princess Serenity and the Senshi are sabotaged by Chaos, which redirects the Senshi’s souls outside of time and space. Unfortunately for the Ruinous Powers, however, the infant Serenity lands practically in the Emperor’s lap; sensing a power to rival his own, the Emperor promptly adopts the girl and raises her as his daughter. As the Emperor and the Princess search the galaxy for the lost Primarchs, they discover that Serenity's original guardians, the Senshi have come along as well. Usually as the partners, (adopted) family or even lovers of the very Primarchs they are searching for.Now flash forward to the 41st Millennium. Princess Serenity is worshiped as the first child of the Emperor and the Senshi — called Anima by the citizens of the Imperium — are revered to the same degree as the Primarchs, but the galaxy is still much the same Grim Dark battlefield that it is in canon, though there are numerous changes which make themselves apparent as the story goes on.Our story begins when COMMISSAR CIAPHAS CAIN, HERO OF THE IMPERIUM! and the Valhallan 597th find themselves abruptly dispatched to the Death World Hades VI, where an ork space hulk has crash-landed and its contents have begun harassing the locals. The Valhallans have barely made landfall when the orks mount a major offensive, setting off a chain of events that leads Cain to stumble onto the lost resting place of Sailor Saturn, who went missing shortly before the Horus Heresy. In typical Cain fashion, the situation proceeds to escalate very quickly and very badly when the Ruinous Powers arrive in orbit intent on claiming the planet and snuffing out Saturn's life before she can adjust to her new surroundings. At the same time, other factions across the galaxy begin to react to Saturn's return, and none of them have her best interests in mind, not even the Imperium she serves...
Crack Fic: The Parent Thread that inspired this fic is going in a Lighter and Softer direction, regarding the lives of the Senshi and Primarchs in the Pre-Heresy period (The Heresy still occurs, but not as damaging). Some of the exerpts are entirely non-serious, such as the Suspiciously Specific Denial regarding the death of a historical romance writer whose Off-characterization of the marriage between Perturabo and Mercury became fanon across the galaxy.
(2) I hasten to add that all rumors of the Iron Warriors involvement in Moer’s untimely and unfortunate end are nothing but rumors, as there has been no evidence that the First Chaplain of the Iron Warriors had her blood on his crozius after Moer’s brutalized body had been discovered. For Further reading, I recommend perusing Horatio Grissom’s Scelere, Poena et Literature Vol. V, which discusses the case in detail.
Fish out of Temporal Water: Hotaru’s biggest issue; she’s exceptionally compassionate, idealistic, and she dislikes killing, which would be fine if she were still living before the Horus Heresy, but in the Grim Dark 41st Millennium, those three traits are not conductive to a long life expectancy.
Heroic BSOD: Hotaru goes through one of these after Cain breaks the news to her that the Imperium has gone to hell in a handbasket since she went to sleep.
Hulk Speak: Cain and Hotaru speak Low and High Gothic respectively and have only a passing familiarity with each others’ native dialect. Attempts to communicate between them (or attempts by Hotaru to communicate with just about anyone) inevitably result in this trope.
In Spite of a Nail: At first glance, it seems as if little has changed from the regular 40K universe (in fact Ciaphas Cain and company are still around). The devil is in the details though: among other things, the Imperial Guard apparently treat Jupiter as its patron saint.
Irony": The Messiah is met with much Oh Crap from her own subjects. An Inquisitor calls in a Battle Barge of Space Marines to Exterminatus the planet with said Messiah on it. Another Inquisitor ends up leading the above mentioned Operation Keep Messiah Alive, which will be seen by many as Heresy against the Imperial Creed. This point of contention will likely trigger a Civil War. Isn't The Messiah supposed to be a good thing?
Knight Templar: Par for the course in 40K, naturally. But a shining example comes in the form of a Space Marine force commander who refuses to believe that anyone on the planet is anything other than a Chaos-worshiping Heretic. Not even when Hotaru shows up, and despite his own Chaplain's efforts to beat some sense into him.
Let's Get Dangerous: Cain is briefly overcome by a very uncharacteristic zealous fervor when he realizes he’s standing between a sleeping Senshi and a group of hostile orks.
The Messiah: Sailor Saturn, Anima of the Imperium, heir to the Imperial throne. Plenty of factions will not be amused.
More Dakka: Subverted. It’s been noted on Spacebattles that Hotaru is just about the only person in the 40K verse who needs less dakka.
Also played straight when the Hades PDF, originally thought as a joke by the Valhallans, reveal their first ace in the hole. A customized Baneblade variant with Plasma Cannons. When that proves to not be effective enough, they reveal their second. An Imperator Class Titan backed up by a dozen Baneblades.
My Greatest Failure: Hotaru was originally put to sleep by the G Eo M because she screwed up a routine mission and had to Silence a planet to eliminate a Chaos insurgency.
Power Creep, Power Seep: Averted. Readers who are only familiar with the Sailor Moon anime might cry foul at the massive power-up the Senshi appear to have been given or scoff at the idea of Serenity being the Emperor's equal, but Arkado has explicitly based this story off of the manga continuity, which is both Darker and Edgier than the anime adaptation and significantly more hardcore insofar as Power Levels are concerned.
She Is All Grown Up: Hotaru is a bit older than she appears in Sailor Moon canon; Cain notes that she looks about sixteen-ish in a few places and judging from his description, she’s apparently filled out in all the right places.
Status Quo Is God: A driving in-universe conflict, given all of the factions who do not need an Anima of the Imperium suddenly showing up.
Took a Level in Badass: All the Senshi, as mentioned above, are spoken of with the same reverence as the primarchs, though compared to their brothers they were apparently more spiritual leaders than they were great warriors and they don't have an equivalent force to the Space Marines. That's not to say they couldn't kick ass, though; Jupiter is apparently the patron saint of the Imperial Guard, and Hotaru — despite being fresh out of 10,000 years of cold sleep — is virtually a One-Man Army against orkish and Chaos forces.
Well-Intentioned Extremist: Almost everyone, given the setting, but the most spectacular examples so far include the Saturnian Royal Guard ( who will follow the Anima, even if it means fighting the Imperium), a bulk of the SpaceMarines ( who remain convinced that everyone from Hades VI, Hotaru included, are lying heretic scum like the Chaplain who realizes the truth), and Amberley (who is so used to having to manipulate everyone that she goes behind Hotaru and even Ciaphas' backs to protect them all).