Who Am I?

I walked back to my class while thinking about today's incidents.

"Ah! There you are…!" someone from behind smacked me.

"What?" it's her again, Iris.

"I was looking for you all this time," she said as she started walking beside me.

"What did you want to talk about?" I don't want to add on my worries because of her.

"If you want I can promote to 'A' class. Only if you beg me." What is she babbling about? Why would I want to move to the 'A' class? After I was able to know that the culprit might be in my class.

"No, thank you," I politely decline.

"It's alrig-", she looked bewildered, "What?! You don't want to be in the 'A' class?!"

"Yes, you heard me right. Now if you would excuse me I have a class to attend," I tried escaping from her but she held onto my collar and stopped me.

"Really?!"

"Let go of the collar," I said.