monoma is just saying how much of an ego class 1-A has

Aizawa: that's enough...

everyone goes quiet

Vlad: today there will be a special participant

Aizawa: please try not to embarrass yourselves if at all possible.

everyone is curious on who the "special participant" is

Aizawa: this person is interested in switching to the hero track.

everyone looks at the person in awe once they see who it is (exceptfor bakugo)

Aizawa: from general studies class C...Hitoshi Shinso.

Aizawa: Shinso will be joining in on your training. He's hoping to be one of you. So treat him like you would any classmate.

(EDITED HOPE YALL LIKE THIS MORE)