They're too busy mocking people and stirring up chaos and having fun and possibly kissing to be the proper angel and devil! And sometimes they'll swap roles and DE!Alastor is doing the tempting and Canon!Alastor is doing the angelic guidance.

This comes from comments made on this post from @leekandpotatoes

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Human Alastor is jealous that Demon Alastor is safe enough to wear eyeshadow and a bob. The Demon even has his nails painted! I need human Alastor so fascinated with his Demon's appearance and appendages. But he refuses to be like those whites that would tug at his hair or pull at his clothes.

Said Demon is looking at the pearly white of his Human's teeth. How subtle his canines are, despite being sharper than most humans. The blunt, well maintained nails that wouldn't accidentally rip anything. The pearlescent, soft, clay-toned skin. The chestnut hair with his Maman's curls. And the deep cocoa eyes, with rivers of caramel and freckles of cinnamon when the light catches. Human Alastor is warm. Both physically and metaphorically.

And the Demon knows himself well.

Knows his own curiosity. And knows that he can make a deal out of it. Something small. Something to ease his human side into trusting him. Something to reel the other in and slowly give up more and more. So the Demon offers that the human can examine him. Up close. Personal. Hands on. Yes, he can tell you want to get your tiny hands on his big one and touch his claws. "But! In exchange for that access, you give the same back. No, I'm not using it to possess you, little thing. I'll even add that to the wording, so you are rest assured."

Demon Alastor is planning on how to keep his human side's appearance. How to preserve the other. Like an animal in amber. Or like a butterfly on a pin board. Without giving up the chance of actually holding said human. He likens himself to Hades, for this human will be joining him in Hell. Very, very soon. No bullet to mare their face or destroy their skull. The Radio Demon even wonders if his pocket space, his magic formed bayou, would feel enough like home to prevent the little creature from fleeing?

At least, for a while.

It's just an interesting consept and I will never get why do people hate it. Just bc It's unusual, doesn't mean It's bad??

I can't even call myself a selfcest shipper, there like only few ships like that I like and my favourite one is litterally oc. But in theory, It's not a bad thing. Especially for characters with npd it could be a good experience and probably one of the ways to get a healthy relationship with someone (like Sylki or Alastorcest (especially considering that Vivien herself said smth like "Alastor wouldn't date anyone, bc he can't love anyone more than himself")).

As someone with npd (I don't know if it defines anything tho), I do love this idea in general and find the whole "love yourself" and "find someone the same as me" actually good and possibly the best that can be imagined, so these people who for some reason are trying to make it look bad, gross, problematic and etc really annoy me, bc what can be more consensual and healthy than being with yourself, the only person who fully understands you and knows you better than everyone, basically knows everything about you and fits you perfectly? I genuinely don't understand how can people hate it, bc to me it seems like the least problematic ship dynamic exist