The empath’s fixation on 'saving' the narcissist is, in truth, a projection of their own unresolved wounds—their deep longing to be loved, seen, and validated. By focusing on the narcissist's pain, they avoid confronting their own.
All existing entities depend on an energy source for survival. 'Demons' are no different, except they don't feed on physical food. Instead, they feed on dark energies like fear, negativity, hopelessness, ignorance, greed, apathy, pride, confusion, narcissism, selfishness, and so on.
What I find particularly compelling about the 7 deadly sins is that they are all based on emotions. In fact, I think that instead of calling them 'sins', they'd be better identified as 'nasty' (undesirable) feelings that have the potential to develop into harmful actions.
