Aizawa: "Alright class, settle down now, we will be having a very special new student joining us!" He said, grabbing everyone's attention

Katsuki: "And what's so 'special' abt this new student!?”

Deku: "Kacchan, please be nice..."

Aizawa: "Anyways,He will be joining us shortly...He has Tourette Syndrome, so please be respectful!"