Suddenly Quirkless

The world is not black and white.
It is not grey, nor is it anywhere close to monochrome.
The world was made of rainbows. Beautiful, terrifying rainbows.
Killua Zoldyck knew these things, even if he hadn't, at first. And yet, even as he knew these things, he still managed to see his life through the bleak eyes of one who knew only death and pain. Because Killua, before learning of colors, was taught to fade into- to become- the darkness.
Then Gon had arrived, bringing with him a plethora of yellows and blues and green- so much green- and Killua lost sight of the darkness. For a moment, it receded into the background.
But only for a moment.
Killua didn't want to lose his memories of the colors, but he did wonder if things would have been easier if he'd just gone along with the life laid out before him.
The fear of losing the colors was what made them painful in the first place, but Killua couldn't help it. Once he'd seen them, he could never forget, even as their absence reverberated through his soul.
The rain was grey. Soft, and light, but grey. A different shade than the one he'd grown up with, but still, grey had always brought him so much suffering.
Would it stop, if he stopped struggling against it?
In any case, Killua's world had disappeared, in the rain, and when he'd opened his eyes, the rain was bluer than he remembered. Pellets creating a barrage instead of droplets that melted on his cheeks.
For a while, he returned to the shadows.
When he finally emerged, he heard whispers of heroes and villains, of vigilantes. Of quirks.
Killua knew far too much for his age, yet at the same time, far too little. But one thing he did know was that he did not want glory, he did not want fame or money. Killua wanted the colors, the fun, the laughter.
And he'd do anything to get it.
Now, remember one thing: Killua Zoldyck is not a villain.
But he is far from a hero.

*This fanfiction is inspired by other works of the genre; see the first page