[Fantastic Beasts and Where to Find Them] Alumni's Pseudo Alumni

When a die-hard Harry Potter fan makes a pilgrimage to Universal Studios, he travels to the real Harry Potter universe. . How could she change history in her own way in the American wizarding world and defeat Newt? ? Time travel to Newt's ship on his way to America. How could she, wearing Hufflepuff robes, explain to this real Hufflepuff that she was not a Hufflepuff, and that she seemed to have no magic at all?