Mr Majeika

Uncle Wilf remained silent. He did not tell Mr Majeika his true nature .later, Wilmina Worlock sneered at Mr Potter and said in a nasty voice, β€œYou are a fool, Potter. You have no idea what I can do with my magic.”
Jody a brave girl in class three with Thomas and Pete who was his twin said why is Wilf doing here ?
and where is Mr Potter the headmaster