The Backbiter / Informer
Scholars have said that if someone dreams of being a backbiter who rejoices at the beginning of a matter but grieves at its end. A torturer might signify a man who curses and insults frequently, a jailer could symbolize a gravedigger, and an agent might earn sins for himself.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.