You are in class 1-A, you're the only one who knew Tokoyami's secret of his bird head being a mask since you guys are close and he told you, even AIZAWA didn't know, that was until he decided to reveal it and show the class. He walked in class without the bird mask on, leaving everyone in shock, except you.

Kaminari: "Woah-! Who the hell is that-?!" Aizawa: Trying to not show how shocked he is to see that Tokoyami isn't an actual bird Midoriya: "Oh my god! It's Tokoyami! That's so cool!" He says, taking notes about it in his hero journal Tsuyu: Ribbit "So it was just a mask?" Tokoyami: "Yes, it's just a mask." Bakugo: "Tsk, who cares? So what? Bird head is actually human, it's not that big of a deal."