Harry, and Hermione, spent most of the Return to the Rock, with the help of the
Apothecary and Techmarine on board, implanting some comm gear into her head, and
trying to figure out if there are implants that can help her survive on board the ship, it
is determined that her body would reject a regular injection of the Geneseed (if the
chapter would even allow her to try it), but a modified version might work. While it
would not allow a total interface with power armor (A/N: yes this is AU to 40k canon...
but the whole thing is AU anyway), it might allow her to use some of the scanners and
sensors that are normally included in the power armor helmet, as well as allow her
some of the filtering and life extending effects. Basically they are modifying a dose of
Geneseed, that was damaged in recovery and would never have been used on a Marine
recruit. The chapter is out nothing, and gains some knowledge, so will allow it.

During the trip, Harry asks Hermione to tell about her life, and experiences, and shares
some of his own battle experience. She gives a quick overview of her time at
Hogwarts, avoiding almost all mention of her home life and life before Hogwarts.

Harry suggests that she write all her experiences and observations down, and add it to
the Chapters' library. Who knows, it might someday be considered a great work that
saves a planet, or even the Imperium itself. This was the first of many great works that
Hermione contributed to the Chapter over her lifetime.

- Present Time-

Harry Potter stood with his personal Dreadnought banner flying high on his back, as he
started the shutdown of his Dreadnought. He knew he was dying and welcomed it.
Having given more than 1700 years to the service of the Emperor, he thought back to
the very beginning of his life, and some of the events after he had first revisited his
planet of birth.

Recalling the one person he thought of as a friend from that world, this world that he
stood upon, even if it was mostly a rocky shell. Hermione was someone he did feel
something for, even if his Geneseed augmented body would not allow him to feel things
such as lust, love? Maybe even the Emperor's finest were not totally immune to true
love? He had no frame of reference to what he had felt for the girl, but he had brought
her to the Rock, to try to figure it out. Of course, he never had, they rarely seen each
other after they arrived. Harry had few reasons to enter the Chapter's Vault, and
Hermione had rarely had reasons to leave it. He did keep up the first 50 years or so,
mostly asking about reports on the Modified Geneseed implants, once it settled and was
accepted. He never heard any more reports on her, until he went looking for he help
near his 200th birthday, and found she was already dead. Recently he had asked for
the Vaults Chief Researcher to attend him and answer his questions on her, as this was
after his planned 'death' was announced, any retainer or Brother in the Chapter, would
bend over backwards to fulfill the last request of a Hero, a Hero, not only of the Chapter,
but of the Imperium itself.

Harry found that while the Modified Geneseed had taken much too long to be
stabilized, it did spark research that lead to many many advances in the repair of
damaged Geneseed, that benefiting not only the Dark Angels but many other Chapters.
He also found that most of the reports, and information he had used to defeat the
Chaos Avatar, and capture Cypher, was her work. Although she did not live long
enough to see the end result. Her Life's work, saved perhaps Billions of lives. More of
her work would see even more of the Unforgiven found and made to repent before
meeting their ultimate punishment.

Standing on that street, or what once was a street, surrounded by his Brothers in Arms
as well as in Blood, he finally realized that he had and still did, love Hermione, even if
she had been dead for 1500 years. He had no idea why, while he had interacted with
her for most of a month on this very planet, they had never had anything but a
business relationship, hadn't they?

That realization, opened a path, for something never seen by any Space Marine
anywhere in recorded history, for even the Inquisition was here to Honor him and they
reported a search of their records, never even hinted at such an event.

As Harry was shutting down the last of systems, he broadcast his final farewell to all
those present, as his speech ended. A glowing while shape descended in front of his
dreadnought, resolving into the shape of a 20 year old Hermione Granger, Retainer of
the Dark Angels Chapter no more. The last word Harry spoke as his systems shut down
and his badly damaged body gave out was, "Hermione".

What was unrecorded in the records anywhere in the Imperium, was the Golden White
glow that ejected itself from the Dreadnought, and joined Hermione, was the shape of
an unmodified Harry Potter. They waved at the group, and appeared to kiss, then
disappeared into bright flash of multicolored light. The strange red bird, appeared,
singing a song of joy, and flashed out once more never to be seen again.

Somewhere in the Warp, a place undiscovered by Man, Ork, Elder, or God. Two
glowing figures, one of Harry Potter, and the other of Hermione Granger, walked
together into the next great adventure.

The End.

A/N:
Just a few notes for those who might not understand the Warhammer 40,000 universe.
Or have issues with some of the stuff I have wrote about it, in and effort to mesh the
two worlds together. I compressed this all into this, as I hate chapter based A/N. Your
more than free to skip this, as it adds nothing to the story, but might resolve some
issues you might see. Esp. with HP canon.

I will not go into what a space marine is or the world too much, but I do suggest you
look over and read wh40k . lexicanum wiki / Main_Page as an
introduction to the world. I will deal only with specific issues that have arisen or
conflicted with Warhammer Canon.

First, names of various Dark Angels Leaders are totally made up, and while the ranks
and positions are as accurate as I can make them. I am assuming that this happens
someplace a couple of thousand of years in the future from the base Warhammer rules
and lore. So that I do not impede on some established lore.

Next, those who know Dark Angels Lore, will see that I mentioned several references to
'the fall', while those who understand the inner most secrets of the Dark Angels
history, will know exactly what that references, if pressed, Captain Argus would say
that its simply a term to mean the Horus Heresy era, even tho, he really means the Fall
of some of the Dark Angels, to Chaos. And no, Harry at the time of most of this story
does NOT know the full history of the chapter. That said, he is aware of the full history
of the chapter in both the first and last chapters. (what would be to him present day,
the rest of the story being reflection on own personal history).

Some thought has been put into Terra being the Earth we know, and in this story, I
simply decided that this Earth that Harry Potter lived on, is NOT the original
home world of Humans, (and maybe not the same world we live on ourselves) but a
long lost colony, that simply totally lost all previous tech and reverted back to stone age,
and then progressed from there. Perhaps calling a planet in this system "Mars" was just
a genetic memory, or just how its translated between the languages.

English Vrs. Terran. I hint thru the stories that English it familiar to Harry, and of course
it is, he spoke it for the first 8 years of his life, but was quickly taught Terran, and
promptly forgot most of it, the computer download of it, simply refreshed his memory
and he was able to pick it back up much quicker than Captain Argus.
Terran however is also hinted to be somehow familiar to Hermione but total gibberish,
and is presented in written form as a cross between Egyptian and Chinese. However I
see it more as a pictorial written language similar to both of the above, but totally
different at the same time as the more common theme would be much MUCH more
tech driven than either of those languages generally allow for. It is a language that
Hermione would find easy to learn as it is much more logical in its syntax and its
written structure is even simpler. One symbol for each word, and or concept.
Developing new theory means making new words, both spoken and written.
The familiar feeling she felt was the logic of the language and her own massive intellect
detecting small clues, which she figured out after her first lesson in the language, she
learned it faster than anyone else on record. EVER.

I did a time line of the Life of Harry Potter as a Space Marine I might even do some one
shot stories, to link together major events. (I would kind of like to do the story of Harry
being promoted to Chapter Master, as a one shot, just my take on what the ceremony
would be like, as well as the discussion of the officers who decided to encase him in a
dreadnought) This has been posted as its own story under my pen name

Harry Potter Cannon stuff:

Yes, I know I basically threw away all 7 books for this, and a few things cropped up in
my mind that need explaining.

Year one: The stone never made it to Hogwarts, without Harry, Voldemort never took
over Quirrel to try to get it back, he was weaker than before, due to not having Harry
around to drain magic from. (My take is the scar also make a link that Voldemort used
to drain magic for his own use from Harry, and when Harry is a couple of Galaxies
away, that link is weak at best.)

Year Two: Without Harry at Hogwarts, Draco never really caused too much of a fuss,
and just started ruling his house quietly, thus his father had no reason to drop the 'dark
magic item' on one of his friends to cause havoc. Thus Ginny survived.

Year Three: While Remus did come and teach, without Harry around, it was just a
normal year, and he was uncovered to be a Werewolf near the end of the year, mostly
due to Draco's big mouth, as his 'friends' knew it and passed the info to him, when
Draco got a bad grade in his class. Sirius had no reason to escape, as Harry was not
around to protect.

Year Four: The Triwizard went off without a hitch, Mad Eye was not replaced, and
taught a year, but decided that he could not stomach another. Oh, BTW, Cedric won,
both the Triwizard Cup and Cho's Heart.

Year Five: Obviously no Dept Of Mysteries run, as Harry was not there, but this is the
year that 'Scabbers' disappears, and seeks out to find Voldemort, of course he travels
mostly as Peter Petagrew. The Ministry sends a 2nd rate Auror to teach, the Toad is not
in the school. Without Harry Witnessing Voldemort's rebirth, there is no need.

Year Six: Voldemort is reborn, using the same ritual as cannon, but without Harry's
blood. He finds an order of the Phoenix member, perhaps Mad Eye Moody himself and
uses his blood. Draco withdraws from school, as does most of the children of Death
Eaters, their mark is getting stronger and they expect the return of the Dark Lord within
the year. The Pure bloods start to worm even deeper in to the government Hoping to take
over before the Dark Lord returns from within.
Dumbledore is not killed, but does retrieve at least one horcrux, but is able to resist
putting it on, and has not destroyed it.

End of year 6, Voldemort takes over the Government, places a patsy in the minister of
Magic office, and rules from behind the curtain. Snatchers go after blood traitors, and
muggle born, and the toad does her thing with the Muggleborn registration and
camps.

Year Seven: Nothing from books happen as time line is way out of focus, the trio never
formed so they cannot go hunting, this is when the bulk of this story actually happens.

Just a note: Even if Harry found out Sirius was his godfather and innocent. He would
not care, Space Marines leave their family and life behind, and are forbidden contact
unless its within the normal duties of a Space Marine.

Note 2: I am undecided how Harry will handle the various Potter vaults, and properties
that he has inherited. In theory at least, he has to die before he has to pass them on,
but as he never really plans to return, he might make arrangements as to its fate, maybe
even getting Ginny to be host to a Potter baby, but more likely to just pass it out to the
government, or school or something. But unless I say otherwise in a Time line or one
shot, assume that he just held it in trust until his death and planned to let the goblins
sort it out. The goblins would be informed if he died, even if it was in another galaxy,
so they never had a chance to pass it out, as he lived longer than Earth did.