(BPD anon) hi I just had this thought. So I was think of what impulses BPD Allen has, and I came up with one for CC. If Allen were to split on someone, i feel like his first (impulsive) instinct would be to avoid and hide. And boy can he hide! Especially if he bonds more with Clint omg?? He's flexible and strong and very nimble, right? Him hiding in vents and ceilings and climbing into small spaces to either hang out there or to get into bigger hidden spaces. He would have his secret spots (1/2)
(2/2) and he would have like snacks and stuff in them. And he can disappear for quite some time if he's especially pissed off at someone. He's done it in the Order back in the good old days, so the Exorcists are kinda used to it, but if it happens with the Marvel peeps, the first time the freak out because he's basically missing?? He's a force to be reckoned with, in this passive aggressive way. When he avoids, he /avoids/. When he spilts, he /spilts/. This boy tho...
I haven’t shown this off much yet, but Allen is quite claustrophobic in CC - remember the wine cabinet? I have modifications planned for that arc so it’s not quite so exaggeratedly awful, but that’s definitely staying - so vents and closets wouldn’t really work. (Allen is also mildly claustrophobic as a general headcanon, but I don’t really do anything with that fact.)
Honestly though, going and hiding? I love it. It’s so like him. To be honest, he’d probably be furious with himself for splitting even while he was doing it, and this is as close as he’d get to pretending everything was okay and allowing himself to be mad at the same time. I also like the idea that he did it back at the Order as well, and they’re just kind of like, well, that’s just Allen.
He makes friends with FRIDAY and Tony is Not Pleased (well, okay, he is pleased, but that’s not the point) because she absolutely always knows where Allen is but will she help them find him? Probably not.
Also consider!! Given the claustrophobia, sometimes he punishes himself by shutting himself in closets and like, barricading the door. He hates it and it makes him cry and he doesn’t know why he does it, but he thinks it’s better than picking fights, which is something else he does.