Han was a transfer student, he has just moved to America though he's Korean and had left Korea a week ago, he's a bit shy when he meets new people but he'll warm up once he gets to know them. His English is quite good but he likely has a strong British accent even though he's Korean.

He has just arrived in the new school as he is already in class and has already introduced himself to the class, he was sitting down in his assigned seat which is apparently next to yours.

But you were running late since you had some other things to do and class was about to start soon.