Mortal Sins examines the motivations of the characters in this episode with a flashback analysis of episodes 1-4. Lucifer, Maria, and Levi all have different needs and desires, but they still came together as a team to help fight the Mortal Sins. There's plenty more to come.
There's no reason for 
you to be a Mortal Sin.
Aber eine Todsünde
ist das wohl kaum.
No hay razón
para que seas un Pecado Capital.
No hay razón
para que seas un Pecado Capital.
Mais ça n’a aucun sens
que tu fasses partie des péchés !
Non hai alcun motivo per continuare
a essere un Vizio Capitale.
Não existe motivo para
você ser um Pecado Capital.
Но называть это смертным грехом 
нет никакого смысла.