Zachary turned out to be a really good person. Though he came off as standoffish, he had a wicked sense of humor and quickly became good friends with Tracy Davis and Millicent Bulstrode. They had transfigured him a bed in the boys dorm after all the Hufflepuffs had kicked him and his belongings out unceremoniously. They had also used charms to turn all his yellow and black robes to silver and green. None of the teachers could undo the charms, and he became a Slytherin in all sense.