Because I didn't want to write a lab report

Having been intrigued with the Eternal Universe since I read of it I decided to write a very short piece in it to see how it went (I also didn't want to do a lab report so...). I think it’s not bad, but I’m a little bit biased, so tell me what you think!
For a thousand years, he waited.
A millennium ago, on a world virtually indistinguishable from this one, they came. Aeternalae they were called, demons, taking the shape of comely women. A single one had come to the dorm he lived in. Within three hours, he was the only human left. They had cornered him, his former friends and classmates, intent on making him into one of them. He fought back but it wasn’t enough, he was overwhelmed in seconds by the onslaught. Conversion seemed certain, he was on the verge of becoming one of them, loving the one that changed him, when salvation arrived.
An elite force, intent on protecting humanity from all that would harm it, from all threats across all worlds. They saved him, they restored him, they recruited him. They gave him a purpose in life, a way to avenge his friends, his classmates, his innocence. He trained with them, joining their ranks, fighting Aeternalae and other threats to humanity whenever and wherever they were found. He rose quickly through the ranks, his determination and skill bringing him to greater and greater heights. Yet for all his victories, for all the people saved, the multitude of enemies brought to their knees, he was unfulfilled.
That night, when the demons had tried to change him, they had brought a void into his heart, one that could never be filled. Hunting the one that did this to him became an obsession, consuming him, causing him to take risks. What he wanted was revenge, closure, or relief, he could never be certain. His superiors had ordered him to rest, to recuperate. That he did, settling into a familiar world and enrolling in a college much like the one that he had frequented so long ago, hoping that the one that changed him that night would show up again. The fantasy changed daily, in one he embraced her, became one of them. In another he held her still-beating heart after he had ripped it from her chest. Yet another showed her, back as she once was, as his best friend and roommate.
It was late one night when he felt something familiar, a feeling honed by a millennium of combat and hunting. They were here. Donning his combat uniform and grabbing his knives he strode to meet them as he had done a thousand thousand times before. There, in the hallway, he saw her, surrounded by others of her kind. Her long brown hair swaying in an invisible wind, bright blue eyes sparkling with mischief. His face contorted as a single word escaped his lips, “Arivida,â€
For a thousand years, he waited.
A millennium ago, on a world virtually indistinguishable from this one, they came. Aeternalae they were called, demons, taking the shape of comely women. A single one had come to the dorm he lived in. Within three hours, he was the only human left. They had cornered him, his former friends and classmates, intent on making him into one of them. He fought back but it wasn’t enough, he was overwhelmed in seconds by the onslaught. Conversion seemed certain, he was on the verge of becoming one of them, loving the one that changed him, when salvation arrived.
An elite force, intent on protecting humanity from all that would harm it, from all threats across all worlds. They saved him, they restored him, they recruited him. They gave him a purpose in life, a way to avenge his friends, his classmates, his innocence. He trained with them, joining their ranks, fighting Aeternalae and other threats to humanity whenever and wherever they were found. He rose quickly through the ranks, his determination and skill bringing him to greater and greater heights. Yet for all his victories, for all the people saved, the multitude of enemies brought to their knees, he was unfulfilled.
That night, when the demons had tried to change him, they had brought a void into his heart, one that could never be filled. Hunting the one that did this to him became an obsession, consuming him, causing him to take risks. What he wanted was revenge, closure, or relief, he could never be certain. His superiors had ordered him to rest, to recuperate. That he did, settling into a familiar world and enrolling in a college much like the one that he had frequented so long ago, hoping that the one that changed him that night would show up again. The fantasy changed daily, in one he embraced her, became one of them. In another he held her still-beating heart after he had ripped it from her chest. Yet another showed her, back as she once was, as his best friend and roommate.
It was late one night when he felt something familiar, a feeling honed by a millennium of combat and hunting. They were here. Donning his combat uniform and grabbing his knives he strode to meet them as he had done a thousand thousand times before. There, in the hallway, he saw her, surrounded by others of her kind. Her long brown hair swaying in an invisible wind, bright blue eyes sparkling with mischief. His face contorted as a single word escaped his lips, “Arivida,â€