My favourite thing about the Aziraphale and Crowley relationship is that they tempt each other
They canonically spend time tempting each other and excusing their time spent together as “oh I’m trying to tempt this angel/demon to the side of good/evil and it’s actually working!!!” to their superiors
And it’s TRUE because their time spent “tempting each other” (ie loving each other and becoming each other’s most important person-like presence in their lives) has turned them both into true neutrals, with Aziraphale being totally okay with tiny infractions for his own satisfaction and Crowley actually caring about the consequences of his actions just because he doesn’t want to disappoint Aziraphale
They are each other’s temptation and that’s… That’s so beautiful.