Marietta Edgecombe

Irvin had been planning a Marietta costume for a while, and debuted it at Leviosa 2016. It mostly looks like a standard Ravenclaw student, except for the spots spelling "SNEAK" across Marietta's face. That, and Marietta must have resting bitch face the entire time. Irvin spent an enjoyable afternoon trash-talking Hermione Granger and being throttled by Umbridge.