Into the Dark

Ever since being rescued from Malfoy Manor, Hermione seems... off. This culminates in her betraying the Order at the Battle of Hogwarts and joining the now triumphant Death Eaters while her friends are left to Azkaban or living in the margins of society. Is Hermione lost to the Dark Side forever? Or is there more to it? DarkHermione... Or is it? Eventual Fleurmione.