Soulmate
She didn't learn any of his secrets, she didn't intersect with many huge turning points in his existence nor was she with him for a particularly long time. She never learned his true name, nor, despite her asking as early as their second venture together, the name of his native planet, nor anything about the world he had come from or more than a rudimentary outline of his life; When she found out that there had been others travelling with him, it was practically by coincidence. She was not particularly powerful or extraordinary as far as the description of her credentials of her life before their meeting went, just an aimless young girl unsure of what to do with her new found adulthood without many expectations for her future, a high school drop out holding a disposable position at a London clothing store raised by a single mother on minimum wage. She was not very much like him, not even insofar as a human was capable of being; Before meeting him, she had never really considered the world outside her little corner of creation, her group of friends, the council estate in which she lived, her mediocre relationship of two unfinished individuals just passing the time together before they grew up to be what they were supposed to become and moved on to who they were supposed to be with, passing every day inside the walls of a small, small world of which she was a fairly insignificant part; And most certainly, he could never have given her all she wanted – Never could he make her his one and only, or give her the rest of his days, hardened over the years and inept to begin with, he could never have shown her what she meant to him the way she deserved it, never spat out those words, and never could there have been peace or reliability in her life at his side –
And yet, she had loved him all the same, with all the love she could muster, valiantly followed her heart with warm, unhesitating eyes despite their star-crossed odds, and the brief instant of bliss they'd been allowed was all the more precious for it's rarity, and as such, more unique than the scarcest gemstone, the most exotic flower;
For even when she had wanted all these things and felt her heart aching for them, she didn't want them if it was not with the one she loved, and of all the boys chasing her heart, it was only ever him, through the distance, all their differences, all the hardship, and the inevitable doom, and all the pain and darkness she couldn't fully take away, they were still happy, they'd still felt bliss together, they'd still defied all odds for a short time that was now less than a thousandth of life, and still stood out like daylight in what had been a harsh time in his life full of heartbreak, mistakes and misunderstandings; though he would not be in a position to put this together until much, much later, when their time together was a long buried tragic dream, there was a good reason that the Moment had chosen her form out of the many many people in his long past and much longer future – She was the first person to make him truly, fully feel glad that he hadn't died when he intended to on the day he planned on ending the Time War.
Despite his ruinous past, he had been so, so glad to have met her, to have been allowed to get to know her; When he danced with her in the console room after that blessed day where nobody died, it was the first time he could feel happy without feeling like he shouldn't, and when he drank death from her lips on platform one, he took his first real step toward absolution – he wouldn't quite get there yet, it would take many more baby steps before he could get remotely close to sublimating all that pain into useful strength, and it wouldn't have been possible without that day when Martha made him talk about his lost world in New New York, without Donna holding his hand in Pompeii or what Amelia told him on that panorama deck on Starship UK, but those days with her had been the beginning of an often painful healing process; If not for her he would never have met any of the others, or made it to the day when he would be able to do something about the events of that dark, dark day –
She was all he could never be, all he aspired to be, all it would take to complete him. She had the eye for the exact things he always missed, she had the courage he didn't always manage to summon up and the compassion he exhaled above all things; She had the passion he never dared to unleash and depth of feeling he tried hard not to leave behind in the sands of time; She was the truth that made all falsehoods disintegrate simply by revealing its presence; She was the light that, just by existing, revealed where the darkness was, even if that darkness was his own; She made him wish that he could be more than he was, to be at his best at all times and more like her in all ways; And somehow, she seemed to want the same, to have found just as many things in him that she wanted for herself – She didn't know it when they first met, but she was the daughter of a brave, adventurous man and sleeping within her was a spark that, once ignited, could never be extinguished; She was always meant to be this, in the state of full bloom, always meant to become "Rose Tyler, Defender of Earth"; All she needed was, perhaps, a helping hand willing to release her from her cage or a situation that would give her a chance to shine, but what she received was even more than this.
Long before she'd seen him as someone she could possibly hold in her arms, she came to admire his strengths and to be enamoured with his way of life, or at least the best parts of it, the looking beyond your own horizon, the standing up against what should be opposed, the refusal to be limited by one's specific circumstances and live a passive life, the willingness to do something even if no one else would, the spirit of rebellion – She may have been gentle but first of all, she was always and completely human, and always true to her heart, absolutely, be it for better or for worse – So she also had the teeth needed to get by and look out for herself, and the will to go get the life she truly wanted, and in that way, they were alike, when it came down to the deepest, innermost cores of their so-different beings, and perhaps that's what tied them together in defiance of everything else they ever were, though they came from different worlds: In their heart-of-hearts, they dreamed the same dreams.
In this unsteady world where nothing lasts forever, they had touched each other's lives and souls, completing, mending, discovering, changing and enlightening each other, and in the process, came to occupy an uniquely special place in each other's lives that no one else could ever fill.