Multiple choice What happened to the girl who betrayed DA? Hermione hexed the word "sneak" on her forehead Hermione stole her voice She was later killed Hermione turned her into a beetle Reveal answer Fill a bubble to check yourself A Correct answer Explanation Marietta Edgecombe betrayed Dumbledore's Army to Dolores Umbridge. Hermione had previously placed a jinx on the sign-up sheet, which caused the word 'SNEAK' to appear in boils on the face of anyone who betrayed the group.