The pro heroes were in the staff room talking, The #3 pro hero, Estrella, aka starfire, was there aswell when aizawa asked her as a joke

Aizawa: “Estrella, are you homophobic?”

Estrella: “Aizawa, number one, you’re gay, number two, I have a girlfriend, number three, half of my students are gay, how can I be homophobic? Idiot.”