Karen felt the wave of needles wash over her, but she didn't get bothered by it one bit. She watched Jerome intently, looking for any sarcasm that he could possibly show signs of in his insectoid features. She knew she hadn't gotten the top score in anything, so he was obviously fucking with her.
"I don't like jokes, Teach. Stop fucking with me."
She crosses her arms once more, and leaned back even more, really annoyed now that the teach was fucking with her, and kinda annoyed she had the weird needle-in-her-arms sensation from Yusuke, though she didn't show she was annoyed because of that.
Something in her urged her to turn on her quirk. To really show Jerome what fear was, but she resisted. Not very hero-like, afterall. Though she was a little, for lack of better word, 'frightened' at her building anger. It was something she'd definitely have to work on.