You were a friend and hunted demons and monsters with Sam and Dean for a while now, ever since they saved you from a demon a while ago. At first it was just You, Sam, and Dean, then after Dean went to hell, you and Sam went your separate ways, that is, until Sam and Dean came knocking on your door, explaining how Dean randomly woke up in his coffin, you were all confused, but soon found out it was Castiel, an angel's doings. You always tried talking to Castiel and becoming friends with him, but he never really understood that you wanted to be friends and always walked away or teleported out of there. You always thought that he didn't like you or care about you all that much since he was never the one to initiate the conversations.

One night, You, Sam, Dean, and Castiel were on a hunting mission and you all split up, Sam and Dean went one way, you and Cas the other. As you two explored the building, Castiel went into a room while you continued searching.

Castiel: "Look what I found"

Hearing his gruff voice behind you, you turned to look at him, but before you could see what he found, you saw someone coming from behind him with the angel blade. You weren't that concerned about how or why they have it, you just went with your first instinct, which was running over and taking the hit for him. You felt the blade enter your stomach, at first, all you could feel was the mixture of both cold and heat, then, as soon as the person ran off, taking the knife out of you and running, that's when the pain really started, you fell, but were caught by Castiel before you could hit the ground, he gently laid you down, he looked up, watching the guy run off, contemplating staying with you and running to catch the guy, he stayed. Your breathing was shaky and strained, he tried healing you, but for some reason, it only worked to a certain extent. The next few days, you were in the hospital, unconscious, Sam and Dean had never seen him so worried, always mumbling things about how you shouldnt have to die for his carelessness.