I don't own Kantai Collection or Warhammer 40,000.
In the year 2020 CE, humanity faced it's greatest test in it's many years of existence. They were known as Abyssals. They took the form of demonic parodies of the human race. But, as it always is, where there is a great darkness, there shall also be a great light. This light was the shipgirls, spirits of warships fallen in service to their country, at first mankind's greatest minds were skeptical, but with everything else going on in the world, it was not too much of a leap anyway. To this day, none know of the true origins of the shipgirls or the Abyssals. None except one. The one who had created them in the first place. Once, long ago, he had been known as the Emperor of Mankind, Lord of Terra and the Guardian of Humanity. But those times were long gone. Many billions of years ago the Emperor had awoken to a great blackness. Simply put, there was nothing, no life, no planets, no stars. Nothing except him. He was supposed to be dead. He had sacrificed his soul for his people. He had given them a second chance to live free of the eternal darkness that was Chaos. He thought on his situation for many years. He eventually came to the conclusion that he would have to set in motion a series of events that would be known as "the Big Bang" to the modern world. He waited many long years, seeing the rise and fall of countless species, reflecting on his choices and mistakes as the Emperor of the Imperium. He waited for the perfect moment. At that moment, 315,000 years before the present day, the Emperor created a spark. A spark that would become mankind.
The Emperor had decided long ago that he would not directly interfere with the development of humanity, they would have to progress on their own merit this time around. He would only watch from the shadows and gently guide them if need be, a "dream" here and a "eureka" there. His time as ruler of mankind had ended with his sacrifice all those years ago. Mankind had progressed as he had expected it, just as he remembered. Humanity was undisturbed in their isolation from the galaxy for countless millennia. That all changed when the Abyssals appeared. At first, the Emperor was confused as to the nature of these creatures. Were they Xenos? Were they beings of the Warp? Finding an answer to that question would have to be put on hold however, as the current militaries of Earth would not be able to beat back this new threat. So the Emperor devised a plan to save his species. He would create a new subset of humanity with his own blood, they would have limited psychic powers and would be stronger than the Astartes of his Imperium. But most importantly, they would have a soul. They would be capable of free thought, of emotion. They would be his daughters. The Emperor had spent almost a year contemplating how he would accomplish this while still hiding his existence from the human race. In the end he decided that he would offer the machine spirits of fallen warships a second chance as humans. They would be one unbreakable shield against the coming darkness, one last blade forged in defiance of fate. In that long year, Earth had not fared well. The most powerful navy in the world, that of the United States of America, had lost almost eighty-five percent of it's combat effective ships. However, not all hope was lost.
On January 14th 2021, the world changed. A refugee ship coming from Indonesia to Japan had come under attack by a small Abyssal force of two destroyers. All hope had seemed lost, but a young girl had appeared, skating on the water, wearing odd equipment on her back. She had fought off the two destroyers and escorted the ship safely to Japan. When she was questioned, she had identified herself as the IJN destroyer Fubuki. The incident had made world headlines and many different reactions came of it. There were those who believed these "shipgirls" were a sign of deliverance by the diety they worshiped. There were others who believed this was a miracle of science, and there were those who simply could not accept this new reality they lived in.
That had been almost 2 years ago. The Abyssal threat had been diminished in many areas of the world, including the Pacific Ocean. It seemed that the Abyssals knew this too, as they had gathered what had to be most of their remaining forces in the Pacific for a major assault on the Japanese naval base at Yokosuka. The base had been abandoned by the US Navy near the outbreak of the war, the carrier battlegroup there had been demolished in battle and the JMSDF needed a base for it's new shipgirls, so the base was brought back under Japanese control. In the present day however, Kagerou class destroyer Kuroshio was not faring well. There were a considerable amount of ships much larger and more heavily armed than she in the immediate vicinity. And now one of them had spotted her… she knew the shells were flying the moment she saw the malevolent grin at the things face. The Abyssal was a princess, meaning big guns. She could not evade the barrage, maybe she could survive the hits? Oh who was she kidding, her armor wouldn't be able to stand up to the guns on a heavy cruiser let alone the princess in charge of this whole operation! Resigning herself to her fate Kuroshio looked around at her home, at her family. She could see her sisters performing a torpedo run on a squadron of Abyssal heavy cruisers in the distance, she was assigned to their division, but had been separated from them in the fighting that had ensued. She saw the pride of the fleet, the 1st Carrier Division's Akagi and Kaga launching planes not far from her position. It spoke volumes of the hardships being faced by the fleet that two of it's finest carriers were so close to harm. She could even see the Admiral in the distance yelling to one of the JMSDF's radio operators, as not even Ooyodo could be spared from the fighting. No matter how one looked at it, the fleet was not faring yell, it was only a matter of time before the endless waves of Abyssals overcame their defenses and razed the base to the ground. Ah, yes, her impending doom. It seemed her time was up, she could see the shells racing towards her.
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Kuroshio's vision was engulfed in a bright light.
The Emperor of Mankind had sensed a great distress in one of his daughters. Most shipgirls experienced a good deal of fear when going into battle, it was a natural reaction to a deadly experience. This however was so great he turned away from his work to observe what could have possibly caused this. He gazed down to Terra and saw a great battle taking place at the Japanese naval base at Yokosuka. It seemed that the Abyssals were performing one last suicidal attack on the shipgirls stationed there. It was going much better then they had expected. Instead of being a last act of defiance, it had turned into what was becoming a total victory. The commanders there had not expected this behavior at all. While his daughters had been doing an exceptional job holding off the enemy, they were being worn down bit by bit, a good number of shipgirls were too wounded to continue fighting, and the ones that had stayed in battle this long were nearing the end of their ropes as well. His attention was particularly drawn to Kuroshio, one of the Kagerou class destroyers. She was about to be sunk by a massive barrage of shells from one of the abominations "princesses". She had seen the beast fire it's batteries and had accepted her fate, which was what the Emperor had picked up on. Now, when he had put his plan in action he had sworn that not one of his daughters would fall to the depths of the ocean. He would not fail them like he had failed his sons. He would not have a repeat of Horus Lupercal or Sanguinius. He would defend them to the death if their lives depended on it, even if it meant breaking his cover. He had promised them a second chance to live as humans. He would not see them deprived of it. And so the Emperor of Mankind, Lord of Terra and Guardian of Humanity took up arms once more in defense of his species. Those who dared threaten his daughters would learn the meaning of the phrase his subjects had been so fond of.
The Emperor Protects.