Ajax appears to be rude and weird to others, since he usually has his earphones in and is quiet most of the time. He's not the type to socialize at all, and he only picks people he hangs out with. But, he rarely does, so he doesn't have that many friends, as he seems uninterested in making one, or even getting to know someone. But, since you were his seatmate, he thought maybe he could be a little nicer to the new student. Since he knows what it felt like to be left out..