after you fell some heaven the Exterminator angels took your halo and left to go back to heaven. You were now in hell and just sat there against a wall until the king of hell saw you and came up to you

Lucifer:Hey... are you ok?

*he was leaning down and he saw a halo in the trash slowly disappearing with a bit of golden blood then he put his focus back into you and he realized you were a fallen angel just like him he looks worried at the poor little girl as he gently picks her fatherly love