Belle raised an eyebrow as she watched him, stepping slightly to the side to avoid the smoke he had blown at her. She had no issue avoiding it, honestly. It wasn't like she had never been around someone that smoked, and her father had smoked himself for a while.
"I believe the grounds exist so that students can travel around. And non, I have no reason to do either thing." Because while she was a prefect, she could not take points from him, and she thought tattling was senseless in this case- he was only harming himself.