Bakugou

He would be straight possed off and would try to blow their sorry asses off but you would stop him and he would turn around,facing your tears eyes. He would just pick you up and go to your room,telling you to pack up and not living with your parents anymore. Of course you would try to resist but eventually give up because bakugou wouldn't be bakugou if he would take your no for an answer,therefore he's not giving you a choice. You have to accept his offer.

Kirishima

Kirishima would take you in his arms and comfort you immediately and whoever hurt you gets a piece of his mind. Just like bakugou he wouldn't let you be near to your abuser but the difference is Kirishima would be more the calmer one. He wouldn't give them straight out a punch unless he has to defend himself. He would tell the abuser how unmanly their actions are and would take you under his protection. You would live with him and he would take good care of you.

Todoroki

He would suspect the weird behaviour of yours immediately since he grew up himself in a abusive household but he would not dig into it,not because he thinks it's not his business but because he doesn't know how to approach you without making you uncomfortable. He knows however how much help you needed. The bruises you try to hide are more and more showing and everytime someone would ask,you come up with a lie and shiver being uncomfortable with the question everytime. Todoroki would have enough one day sooner or later and would just straight out say to you,that he knows what's going on. He wouldn't let any excuse coming up from your mouth and would tell you how to defend yourself on that day better. As much as he wants to take you in,he can't because of his father and because of that,he decided to tell principal nezu about the issue but it would take time to arrange everything. That's why Todoroki would tell you what to do and that what's his plan for you is. You hug him and cry on his chest. You tell him how grateful you are and being a social awkward Todoroki is,he didn't know much what to do with your reaction and your physical touch. He just dud what he thought was right and rubbed your back in comfort,letting you know that it's nothing. Also that you can run up to him if you need something. Since then you two would be close and would watch out each others back.

Dabi

Let's be honest there is nothing much to say. Once he finds out what happened to you,that person is already roasted to ashes. Literally. Dabi would first try to calm you down in his own way. Taking you out for a night walk and anything in practicular that you would enjoy to distract you. Once you would however fell asleep,that's when shit is about to go down. He would put you into his bed and once he did that,he goes to the person that hurted you. He put everything in flames and just enjoys the screams of your abuser and watches how they die in his flames. Once his job is done,he returns to your side and lays down next to you. He softly grabs you and pulls you closer to him and would sing his lullaby to you,that he personally came up with. He would sing it to you every night.

(With which characters should I do next ?)