[He has a feeling this student in particular would be negative against him... but it's not like he cares. He's not here to make friends or anything. He's just waiting for a solution that lets him go home.

He glances at the wolfsbane flying.]

You will remain in the classroom and clean all the stations, after the lessons, since you seem to be so keen on messing the floor.

[He's about to leave when one of the cauldrons makes a beautiful firey breathe upwards that it wasn't supposed.]

... make sure Yamazaki helps you out. I'll be back to grade your potions by the end of the class.

[He doesn't even need to look who it was to be right so he just marches into the backroom.]