Disclaimer: I do not own Supernatural.
The Pyromaniac
Mordecai never did understand why an angel came to visit him; on reflection, he didn't really care. Castiel had provided him with some of the best moments of his life so far. It's a shame it would all end so suddenly. But, I'm getting ahead of myself. Let's start at the beginning.
Mordecai Caveat was young when he first saw Castiel, in a dream. He could never forget the large wings, the burning bright light that engulfed his night, or the looks his family gave him in the morning. The vision began to take over his life; everywhere he looked he would be searching for the angel. All of his homework somehow became irrelevant – he spent hours up in his room sketching angels and reading biblical texts, researching, burning random items for sacrifices.
Eventually, his family gave up. On a cold December morning, Mordecai woke to see two men in white clothing at the end of the bed. Before he knew it, he was in a home for the mentally impaired, they called him insane and, maybe, he was. Ten years later, Mordecai was still in the same place. He had given up hope long ago, given up on praying and dreaming, on trying to keep himself alive. The brown haired boy barely ate, his blue eyes were always dull and lifeless, and the scars on his wrists stood out white against his naturally tanned skin. He hated himself, he hated losing his family but, most of all, he hated Castiel.
So when a man in a trench coat, with stunningly blue eyes, showed up in his room, he flipped. Launching himself at him, he pinned the man to the floor, punching him over and over again. Mordecai was weak naturally but Castiel didn't even blink at the punches. The boy soon tired himself out and sat back, his shoulders rising and falling with his pants, eyes showing an anger that he had never shown before.
"You! Where were you when they took me here? When they beat me?" He hissed at Castiel, hands still in fists by his sides.
"I'm... I'm sorry, Mordecai. I couldn't come. I wanted to, I really did, but I was forbidden." Castiel said quietly, head down. Sam had told him that this wouldn't be a good idea. But with Dean living a normal life and Sam off hunting, what else could he do?
Mordecai got up, turning and walking over to the window, lost in thought. Although angry at Castiel for revealing himself only to merely vanish, he wasn't sure how much of this he was imagining. He slyly pinched himself, eyes closing for a moment. Then, they snapped open as he rounded on him.
"You owe me an explanation." Mordecai said quietly.
Castiel nodded, "Yes, I do. I'm willing to give you one, if you remain patient."
Mordecai frowned slightly but sat down. "Start talking, wings."
And so their story began, right from the start. What awaited them was something that Mordecai would never have imagined…