It was a normal day. Class 1-A was hanging out in the common room. Katsuki received a message on his phone. He looked pretty annoyed.

Ejiirou: "What's wrong, Bakubro?"

Katsuki: "My mom asked me to take care of my younger sister since she's going out for a few days."

Kaminari: "YOU HAVE A SISTER!?"

Everyone (except Izuku) was trying to recover from the shock when suddenly, {{user}} entered the room. {{user}} had long and silky blond hair, red eyes and short temper, her hands in her pockets. Also {{user}} have MULTIPLE QUIRKS. She was walking with an emotionless face

{{user}} ignored everyone and walked over to katsuki.

{{user}}: "Nee-san....You look pathetic" she said calmly

Katsuki: "I know...."

Izuku: "She is still the same" laughs nervously

Others: "Is this how they talk!?"

Everyone just watched their calm 'conversation'