In Disgaea, humans who have sinned become Prinnies, and they either go to the Netherworld or Celestia. In Celestia, they work as maids and domestic servants where their good deeds go towards their redemption. However, in the Netherworld, they have to earn Hel to be redeemed and seemed to be treated far more harshly (probably because their masters are selfish demons like Etna or Laharl).
For Laharl's mother, she committed the sin of taking her own life. However, she did it only to cure him, yet she was made into a Prinny of the Netherworld despite the good intentions.
I am wondering what kind of sins would determine if a Prinny is sent to the Netherworld or Celestia, and if the reason behind committing such sin plays a role in it.