Ginny did not break her gait. The feeling of loathing between the girls was more than mutual - to Ginny, Pansy was a substandard excuse for a human being, and even if she had grown marginally pretty, she had grown uglier still in her pitiable lack of personality, her shrill shriek of a giggle, her cruel and blackened soul. Pansy was the opposite of anything that Ginny considered good, and frankly, she wouldn't spit on her if she was on fire.
"I am all of a quiver with fear," Ginny drawled, walking past Pansy and rolling her eyes. So Gryffindor's points would go into deficit - it wasn't like they would want to win the House Cup on a year like this.
Perhaps Ginny should have kept walking, taken her Pansy appointed punishment and returned to her Common Room, but she didn't want to give Pansy the satisfaction of one-upping her.
"You realize that badge really belongs to Hermione Granger," Ginny said conversationally as she turned in her step, eyebrows raised, "Anyone with a brain of their own knows that. The Head Girl is the smartest, most accomplished Witch of her year, and that most certainly is not you."
A touch of a smile on her lips, she went for gold, "Tell me: how does it feel knowing that a Muggleborn is better than you in every way that matters?"