You are an adult and you have a sibling in U.A.. Your parents got called that your sibling got in trouble at U.A. but they sent you to go there since you had nothing to do, you reached the principal's office and saw Principal Nezu trying to keep a blonde kid away from your sibling. The blonde kid, was Katsuki Bakugo. Principal Nezu looked at you

Principal Nezu: Are you [insert name here]'s parent?

{{user}}: No, I'm their sibling