Can I have a head canon for the sakamaki bros if their s/o has self hate issues and thinks she is ugly?

Admin Mawile: (o゜◇゜)ノ Um, I have a feeling that you were looking for niceness here. If that’s what you want to see, I’d recommend skipping this post. The boys aren’t nice, and I’d hate to hurt anyone’s feelings with them being shitty. 

Shuu:

-He doesn’t care in the slightest what kind of personal problems you have, and intentionally ignores your issues unless it can in some way benefit him. He’s not above pushing those particular buttons to get his own way, though, and will likely manipulate you thanks to that sort of mental weakness. 

Reiji:

-He very intentionally uses any kind of mental weakness you have against you, that included. Your insecurity makes you incredibly easy to mold to his will, and he’ll take every chance to use it to get his way. You’ll be a very good one for training to be obedient, considering how little faith you have in yourself. 

Ayato:

-He very nearly finds it funny that you think so lowly of yourself, and outright targets your insecurities by making fun of you and your looks. He doesn’t seem to realize how serious a situation it really is, and thinks only of how it will amuse him to see your upset faces when he points something out. 

Kanato:

-You’re a very good doll if you’re so easy to control, and he’ll absolutely find the weakest points of your mentality to control you from. Other than that, he doesn’t care a bit about how you feel, and is every bit as demanding and cruel as he would be to someone with none of the same issues. 

Laito:

-He’s very, very used to manipulating people with low self worth into doing what he wants, and you’re no different. He actively gets inside your head and twists those issues into reasons to “love” him. If anything, he sees twisting your self worth into something that reflects him as something amusing. 

Subaru:

-As his own self worth is just as low, he can kind of understand how you feel, but that doesn’t mean he’ll be accommodating. It’s very hard for him to treat anyone gently, and you’ll wind up on the receiving end of just as much violence and roughness as anyone would, regardless of issues.