There are many thoughts behind it but I keep coming to this one thought.
What if Pluto and Serenity(not quite queen or a very young queen preparing to take the throne) met when they were each ‘young’. Pluto still older by far but physically not appearing as such. She has already learned at the point in her life to not get attached to people. Namely because she will forever outlive them.
Serenity though is delighted by Pluto and truly Pluto was delighted with her. They each drew the others eye.
So eventually they speak. About anything and nothing. It’s even perhaps a little awkward as Serenity cannot help but speak much of herself and Pluto at first says so little. Yet is hanging on every word of the young Queen.
Serenity in turn does the same when Pluto does finally start to speak of herself a bit. Sparsely, but to do so at all opened a door that she had long since closed. A look inward and Serenity wasted no time to edge her way in, even if just a little.
Truly though she wouldn’t have to do much, opening that door at all meant she already let her in.
More and more they speak. Growing along side one another. They don’t get to meet as often as they like, there will come a time when perhaps that can change but as of now, time is sparse.
Along comes a day where they find they have spent the whole day within the company of the other. Speaking about anything and everything.
Till finally Pluto cannot take it. She cannot handle the thought of losing this girl as such a dear friend and companion.
So she prepares to shut Serenity out. It was already too late to prevent her heart from knowing pain yet again but at least she could spare herself the eventual hurt of losing yet another.
So finally she tells the young Queen.
"I will out live you. As I outlive all that I have ever known."
Serenity quickly picked up on what Pluto was saying. She was well aware of who and what the young gaurdian of the gates was and is and what it meant. She merely smiled.
"It’s alright. I will simply find a way to live forever. Or at the very least, till the end of your existence. The ginzuishou will already grant me a long life, perhaps if I grow strong enough I can learn to live even longer and longer still. For how could I leave such a beautiful soul as you alone."
Pluto had no words. She felt the flush to her face and a smile steadily grow.
She didn’t know what it was about this young Queen, yet she felt every word was true.
If one could find a way to live forever, or at least as long as Pluto herself. Truly it would be her, it would be Serenity.
Really I just love the thought of them growing up along side one another. A long friendship, a relationship, one that grew and changed with them.
They started so close and ended so far apart even though they were physically close than ever.