Gellert Grindelwald

Gellert Grindelwald caused the death of many wizards, including the grandfather of Triwizard Tournament contestant and Quidditch pro Victor Krum. When some Durmstrang students thought it was “edgy” to wear the Grindelwald symbol on their clothing, Victor Krum and other family members of Grindelwald’s victims taught them a “lesson” on how “cool” it was.