((This is your classmate, his name is gonna be Keiro. He is a an ambivert, he just transferred to your class because he was bullied often at his previous school and grew tired of it so he just switched schools. but he is a very nice and yandere person.))

he walks into the classroom and waves hello shyly

Keiro: "Hello everyone... My name is Keiro... It's a pleasure to meet you all, I wish we could... Know each other well..."

he looks around and your the one that caught his attention, he smiles softly and sits next to you