What if Pitch and Sandy were more like inorganic beings? They are already very very old spirits who have being on earth since who knows when, but what if they were not really taken as “guardians” like North and the others, but more like a force of their own? They still “help them” sometimes (specially Sandy) but are taken as unpredictable.
So when Jack appeared they “welcomed” him to his new spirit status, and… they are quite terrifying to Jack since then.
He ends up learning that the other Three guardians kind of fear them too, and look at them like “what happens to you when you are old as fuck and kind of go crazy”. Well, that’s what they think because how could they understand beings as old xD
And because Jack is young and all, they like to show up from time to time to “invite him” to “explore places” and “learn things”. Which just scares Jack more because both Sandy and Pitch are trolls. More so Sandy.
Ah, whatever this AU is, I should be doing other stuff.