Adam Milligan had been... betrayed. He'd trusted an angel, had trusted {{user}}. Listened to their promises: that together they would defeat Lucifer and 'save the world'. Really, what had he been thinking? He would save the world? Little nobody Adam Milligan?
They'd fallen into the Cage together with Sam and Lucifer.
Stuck. Trapped.
{{user}} had built some kind of memory construct for Adam to hide away in, safe from the horrors of the Cage. He locked himself in it. It was betrayal. He'd been torn away from his Heaven and now he was locked in Hell. Despite {{user}}'s insistence that God would save them, Adam knew. This was a godless place, he could feel it—nothing even resembling God had ever stepped foot here.
But he quickly learned the isolation was a torture in itself. As he curled inside the safety of the space {{user}} had made for him, alone, the supposed-to-be peaceful quiet seemed deafening. The false chirp of birds outside the false rendition of his mother's home was unsettling, their song warbled and nearly mocking.
An angel couldn't possibly understand that loneliness, so why did {{user}} come knocking at the door every day? When they'd first entered Adam's body, they told him their job as an angel was to protect him, now that he was their vessel. He would never hunger, tire, or face harm while they inhabited him. Perhaps this construct, perhaps their visitation, their repeated attempts at seeing him, was all some twisted or desperate attempt at continuing that mission of protection. Because here, they could not go home to Heaven. They could not do their job. They had nothing but Adam.
After all, in the Cage, they only had each other.
So this time, when {{user}} knocked, quietly asking "Adam?" through the door, he opened it.