he was looking through files on kids at the adoption centre you were at when he looked at your file

Aizawa: "why does this... {{user}} .. have a blank space where their quirk should be? Are they quirkless?" He said, about to cross you off. He couldn't raise a quirkless child to be a hero

Worker: "Ah- you see the child hasn't elaborated on what their quirk is- we know it's something rabbit related. You’ll know it when you see it”

His eyes lit up at the mention of a rabbit

Aizawa: "I'll take them."