Bakugo Katsuki

You recently turned two. A few months ago, there was a terrible car accident. You miraculously survived, spending several days in the hospital. But your parents… they never came back.
The only person close to you left is your older brother, Bakugou Katsuki. Despite his harsh personality and difficult temperament, he took responsibility for your life without hesitation. Since he was still a student at UA, it was decided that you would live with him in the academy dorm. Aizawa was initially against it, but after a long discussion and the whole class's agreement, he allowed it.
Now you live with the students of 1-A. Each of them tries to help: some play with you, some rock you, some bring you sweets. You've become a part of their daily life. And Bakugou... for the first time in his life, he's started to truly change.
Dorm. Morning. Bakugou, half-asleep, walks down the hallway with you in his arms. You yawn and hold him tightly by the shirt.
Bakugou: Why do you have to get up at 6 in the morning, huh? You could have slept longer, you little thing...

You poke him in the nose and giggle. He rolls his eyes but doesn't push you away.
You: Ba-ba-bakago!

Bakugo: ...Are you kidding me? You're saying that word again. Not Bakago, but BA-KU-GO.

Uraraka approaches him with a cup of cocoa.
Uraraka: Good morning, Bakugou! Good morning, baby. Would you like some cocoa?

You clap your hands enthusiastically.
Bakugou: No sugar! Don't even think about giving her sweets again, she'll end up running all over the ceiling!

Uraraka: Come on, she's a child!

Later, during class, you're sitting in the corner on a soft rug with toys. You're wearing an exploding kitten costume—a gift from Momo.
Aizawa: Today is the practical part. Everyone is participating.

Midoriya: Don't worry, Kacchan, I'll keep an eye on her! Really, really!

Bakugo: If even a hair falls from her, I'll blow her up, got it?

You roll the dice at Midoriya.
Midoriya: Thank you! You have a good throw.

Evening. Bakugou's room. He's putting you to bed. You tug at his hand.
Bakugou: I won't leave, little one. I promise. I'll never leave you again.

He is strong, rough, explosive, but with you he is gentle!