He would get nervous as hell. He’s worried about two things : you getting hurt or you getting possibly taken away from him. Of course, being the procrastinator that he is, he would take some time to carefully analyze the situation to come up with a move to leave with you– without possibly angering the person. As he was about to approach the person, he noticed that you punched the person.
“Stop! I’m already taken!” you yelled as you kicked the person’s shin.
He proudly smiled as he sighed in relief.
“That’s my girlfriend!”
Katsuki Bakugou :
“Please stop, I have a boyfriend already!”
Bakugou’s eyes widened as soon as he heard your voice. He immediately turned his gaze in search of you through the streets.
“I bet your boyfriend ain’t as strong as me,” a male voice chuckled.
The male started to walk closer towards you, making you slowly back off, hoping not to cause any more trouble. As you walked backwards, you suddenly bumped into something. You turned around, and saw your boyfriend literally breathing steam out of his nose.
“DO YOU HAVE A DEATH WISH, YOU OLD MAN?!”
Todoroki Shouto :
After noticing that his girlfriend was getting assaulted by a stranger, he couldn’t help but get angry. Sure, he knew that your beauty gathered a lot of attention, but this was too much. Deciding that is was enough, he quietly approached the man from behind, and tapped him on the shoulder.
“Assaulting a minor is illegal, would you like for me to call the cops, sir?”
Iida Tenya :
The funny thing is, he was actually right next to you when you were getting hit on by a third-year. The dude tried to get your phone number numerous times, even though you said ‘no’ to him every time. Iida found this very rude and unpleasant as he watched his girlfriend getting hit on right in front of him.
“Excuse me! I’m her boyfriend, please stop,” Iida awkwardly interrupted the third-year.
“You are her boyfriend? Girl, dump him for me!” the third-year scoffed.
“I-I would never do that! Please leave us alone!” you shot the guy a glare.
“C’mon, I know you–”
“You benighted scoundrel! If you’re planning to become a hero, I suggest you to leave other men’s girlfriends alone and learn some manners!” Iida screeched.
Kirishima Eijirou :
“I already told you that I’m taken. Leave me the hell alone!” you screamed at the man.
Kirishima quickly turned around after hearing the familiar voice. His eyes widened after he spotted you being cornered by a guy who looked a bit drunk. As he was about to beat the guy up, you activated your quirk and quickly managed to defeat the drunk guy.
“That’s what you get for not listening to me, you drunk asshat!” you spat before dusting your hands off.
Kirishima’s eyes filled with tears as he proudly watched you.
“My girlfriend is so brave!”
Kaminari Denki :
The moment Denki saw a suspicious looking man approach you, he immediately rushed to your side. He would throw his arms around your shoulder and pull you closer to him while the both of you just stared at the man. The man looked startled for a second, before shooting a death glare at Denki and just walked off. Denki was actually nervous because he hadn’t planned out his next move, but when he saw the man leaving, he actually felt proud.
“Now, aren’t I a good boyfriend?”
Bonus!
Dabi :
He’d see a strange looking man glance over to you and start making his way to you, and that’s when the little switch in Dabi clicked and made his way over to you right as the man did. He’d step in front of you with a smile n his face and say something along the lines of, “Hi, were you trying to talk to my girlfriend? Oh, no? Then why were you coming over here?“.
But before the man could even answer, you’d pull your boyfriend away and leave before he’d cause any trouble.