Okay so I'm writing a novel and I need to know the difference between the aforementioned beings because I want to incorporate all three of them into it but they all seem to be beings of death and I want to know how they differ in terms of roles, responsibilities, morality, position, ability, etc. btw when I talk about Samael I don't mean lucifer as Samael is sometimes named as the serpent in the garden of eden. I mean Samael as in the angel that resides in the 7th heaven and is depicted as both good and evil depending on the lore and religion.