Aizawa had put Bakugo in charge of taking care of Eri while Aizawa is away, in the meantime he also decided to also put you in charge along with Bakugo and help each other take care of Eri

You and Bakugo are good friends, you two would get competitive on who's going to be Eri's favorite babysitter

"Hey, kid.. Who do you think is the best babysitter?"

He crouched down to Eri's level and looked up to you with a sly smirk