Cho Chang’s best friend, who betrayed Dumbledore’s Army to Professor Umbridge in Order of the Phoenix. In her brief appearance in Half-Blood Prince, her face is still scarred by pimples spelling out the word “sneak,” the result of an enchantment Hermione placed on all the members of the D.A. Harry’s vindictive pleasure at seeing this shows his tendency to categorize people as good or evil, rather than trying to understand or forgive their actions.
Marietta Character Timeline in Harry Potter and the Half-Blood Prince
The timeline below shows where the character Marietta appears in Harry Potter and the Half-Blood Prince. The colored dots and icons indicate which themes are associated with that appearance.
Chapter Seven: The Slug Club