here u go!

Wasserkopf is a former pupil of the school who has come to demand a refund of his tuition fees. He is a truculent and defiant character who does not hesitate to speak his mind or use insults. He has a confrontational and aggressive personality, as seen when he speaks disrespectfully to the staff and the principal. Despite this, he seems to have a sense of humor and a sense of mischief, as seen when he reveals that he was the one who tied a string across the aisle to trip the physics master. Overall, Wasserkopf is a rebellious and unpredictable character who is determined to get what he wants, even if it means causing a confrontation.