Sam woke up to hear a loud scream. It was cut off by the sound of coughing. He was already out of bed though, practically jumping down the stairs and slamming open the door to your room. Castiel was already there, sitting awkwardly at your bed side while you rocked back and forth slowly. Blood was in your hands and around your mouth, and you coughed more up into your quivering hands. They were tied together tightly by Dean, and Castiel had been in charge of making sure you didn't run away. The angel didn't see much harm in you dying though.
Your blood shot eyes looked up at Sam and you gave a small shake of your head
"Want anything? Painkiller or something?" You shook your head again, looking at the bloody ropes and how they had made red flesh bearing marks where they were. You hadn't at all been treated nicely yet.
"What would make you stop bleeding?"
"Nothing short of a blood transfusion-"
You suddenly vomited up enough blood that your vision shook. Castiel glanced over the blood and watched you give another deep cough. He knew your true focus of pain though was your head.
He reached out and placed a hand on your chest. A burn followed and you hissed, arching away from the touch. Castiel merely raised his hand and placed it on the top of your head. His eyes were focused and serious, expression rather monotone with no personal feelings.
When he pulled away the blood stopped coming up and you took in a shaky breath. You felt like your body was broken down and reconnected atom by atom. It filled you with discomfort and made you shudder.
"I- I need some water."
Sam went into the connected bathroom and soon came out with a bowl of water. He placed it before you and you picked it up. Your hands shook too much and instead of it reaching your mouth you somehow let it slip. The water splashed over you and you instinctively pulled yourself away from it. You slowly went onto the floor, the one place yet covered by your blood. You covered your face with your arms, curling up into a ball.
Without the pain your body felt a million times lighter, though was still working hard to regain that lost blood.
"Hey, you shouldn't act like that. I'm trying to help."
"Help how, Sam Winchester? By tying me up? Kidnapping me? Going to kill me? Sell me? Just because I'm a prophet."
"If you were a prophet, Castiel would know your name. He doesn't."
"You think my driver's ID is legit? That I gave you my real name? How crazy are you people?"
"Castiel would still know."
Now you laughed. It was cynical, dark, amused and above all else, mocking Sam. Castiel this and Castiel that. If only you could tell them how Castiel really feels about them. About humans in general.
"Sam, listen to me now."
The younger Winchester brother didn't come too close but was close enough that he could easily hear what you'd have to say.
"When humans put down pets, they do it because they think they know what's best for them. But do they? Humans are just a pet race to angels. And then not even. Do you know what Castiel will do in the future-"
And then the words were caught in your throat, blood filling your mouth much too quickly for you to dispel. You wanted to turn on your side but felt a foot on your chest, keeping you down. You chocked slightly on the blood as Castiel spoke.
"She's a demon. We should kill her now."
If you weren't so close to death you would have applauded. Castiel really did know how to manipulate humans. Perhaps Sam and Dean were really his pets.
Because the next moment your blood and scattered bits of brain were all over the ground in a splash like scatter.
Because Castiel didn't waste any time making Dean salt, burn, and bury you. And as he watched the dirt go over your body, he decided it was for the best. And he didn't doubt himself for one moment that he knew what was best for these animals.