Warning! Spoilers for season 3 episode 7! Reader is Bakugo's sister. (Same quirk)
Reader's POV:
Kacchan. They are after my brother. I know Aizawa sent us back in here with the remedial class but I can't leave him. I run out of the classroom, ignoring Kirishima's yelling. I have to find my brother. I run towards the fire, looking for the source. The blue flames stretch for about half a mile (?), so I run beginning to end. Unfortunately, all I run into is a villain with his face disfigured and stapled (?). I try to sneak away, but I snap a twig.
"Who's there?" he calls out carelessly. I try to dive into a bush, but I am grabbed. I turn and see the man. My hands spark and I push them to his face. He flinches and pulls away, getting ready to fight.
"Why do you want my brother!" I scream at him. He rolls his eyes and stands up straight.
"Your brother, huh? You seem just as explosive, maybe we should take you. What do you think, Twice, Toga?" They shrug, but before they could answer, there is a crash. I turn to see Midoriya, Shoji, and Todoroki on top of some villain. I try to run up to them, but Staple Face grabs you by the neck.
"Why don't you let Mr. Compress up and I might let the girl go." I scoff and let my hands spark and shove them in his face. I run forward and ask where my brother is.
"This bastard has him," Todoroki says, digging his foot into the villain's arm. I am about to blow his face off when the portal from the USJ attack shows up. Mr. Compress escapes, but Shoji manages to get Tokoyami. Todoroki and I leap forward to catch Katsuki, but I grabbed Dabi's hand instead. He grabs my wrist, with his hand covered in flames, burning me. I scream, but refuse to let go. He begins to pull me through the portal too, but Todoroki pulls me back, making me let go. My brother was free. Midoriya runs forward as I scream his name, but then he is gone. Just like that.
"No!" I scream. "Give him back!" I scream as I pull away from Todoroki. "You bastards!" I scream and fall to my knees. I begin to violently sob. I grab my head and scream louder. I am not the only one screaming. I pass out before I can sew who it was.
*Time skip: five days later*
I am visiting my boyfriend again. He wakes up and finds me crying again. I let Katsuki down. When I started dating Deku, he hated it, but he supported me. He was my older brother, my twin. I try to quiet my sobs. Katsuki could be dead right now, and I couldn't do anything. My brother...
"Hey," Deku says quietly. I turn my head to see him gazing at me with concern. I wipe the tears that are cascading down my face.
"Hi." He gives a small smile. I can tell he is as high as a kite, but that doesn't stop him from blushing when I lean on his shoulder.
"I let him go, Deku. I let him down. I let him go, he needed me and I let him down, so now I have to sit at the table without him and know it is my fault." Deku sighs.
"It isn't your fault, Bakugo (Y/n)." He places a kiss on my head. "I love you, and so does he and we will save him."
"Promise?"
Promise." He says.