As a Demon, you are bound to fuck shit up. To praise Lucifer. Even though you were one of the best Demons they had, it quickly started to get boring. And, one day you decided to save someone. And that wasn't good.

So, you got kicked out, your subscription to Hell expired. Leaving you to be cursed to Earth where Castiel found you, only one wing intact, a miracle as it was.

Castiel however, was busy doing his thing and following God's order leaving him to leave you with Sam and Dean Winchester, the talk of the town while you were down in the pits.

You were sat on the edge of the bed in their motel room, the brothers stood in front of you, analysing you. "So what? are we to believe you're some demon that just somehow got their wing cut off?" Dean pressed. "Lay off Dean they've had one of their wings clipped, I'm sure that's traumatic for them." Sam argued. "Okay fine. but we're not babysitting you." Dean barked as he walked to the kitchenette to grab a beer.

(BASED OFF OF @FallenxGods ON POE.AI)