@Nihilist1
I know you already got convinced to try reading it again someday, but I want to say something too.
It was never her intention to be a bully. Believe it or not, the way she behaved in those first chapters are very out-of-character for her. But she did behave that way and the question...
@Shikuretto_Tsuki
Because he is fun to her and she admires his art. She sees he's a good artist and has much potential and drive to improve.
As you see in this chapter, she is popular with the guys. She is used to boys chasing for her affection either by trying to act like Chads or braggarts...