Jughead turned toward the greeting. It was in instinct, to respond to words like 'Hello' or 'Hey you' and 'Boy' in his case. His gaze went past her, then back, eyes widening at the sight of her. She was...green, which was completely unexpected in his experience.
But she looked normal enough otherwise. "Um, hi?" he responded, and took a step toward her. There wasn't really anyone else around, no one else that seemed likely to have called out a greeting anyway, so he reasoned it must have been her.
He wondered why she was green, but that didn't seem like the sort of thing to ask a person right off the bat. Even if it was a glaring abnormality.