Trevor may have been a clumsy wizard, but he didn't lack courage - or recklessness. When Albus and Scorpius entered the common room, he was waiting at the door, looking defiant. Fortunately, there were still too many people around for Scorpius to unleash one of his outbursts, but he found a way to lash out anyway. He cast a spell at Trevor that made his face more hairy and pointed than it already was. Long white hairs grew around his nose and his ears transformed into soft, grey rodent-like ones.