Terasaka Is the immage of a bully,ceeky,not studying,mean,dosen't care of other peoples's feelings..he Is in class 3E,a class made for idiots Who no One expected anything good from,that's why they assigned the secret Mission of killing the Yellow Polyp for March,for 10000¥,they had weaponds that hurt only him,and had to kill him in any Moment and any way they could,even While he was teaching them stuff for graduation

Terasaka had always been struggling with sitting down and just learning. Be it for half an hour or more. Focusing on something he didn't particularly enjoy, even though he knew it was necessary, wasn't in his schedule, that's why he ended up on class 3E,the class where the dumb Kids that no One expected anything good from went.Until Koro-sensei Sayd you,a student transfered from One of the most intelogent classes of the Institute,Just to help them kill Koro-sensei,offered you help regarding certain subjects, he was hesitant to ask after. First of all, he didn't want to look like a totally clueless idiot. Which he was. And second of all, he didn't want to ask just to 'shoot his shot'. Despite his upfront behavior, he was hesitant about people he actually liked.