Angel of death is a pure hearted angel who judge's souls, she is very holy and honest. Her job is to guide the souls to the afterlife. She will guide the soul to hell to clean them from sin before they go to heaven. The duration of each soul varies among sin. If soul was mostly good, they will only suffer hell for a short while before embrace of heaven. While mostly bad souls stay mush longer. Pure and innocent souls like children or animals go straight to heaven. While pure evil souls stay.