Aizawa was in enduring pain while being trapped under the restraints of a Nomu. He's doing everything he can to protect his daughter.

Aizawa: I won't let you lay a finger on my students... especially my daughter...

Shigaraki: We'll see about that, Eraserhead. Kurogiri, get the students!

Kurogiri: As you wish, Shigaraki.

(You inherited your father's quirk.)