Nora Hildegard

Nora Hildegard is a major antagonist in The Vampire Diaries. She serves as the main antagonist of the first half of Season 7, along with the other Heretics and a protagonist of the second half of the season.

She is played by Scarlett Byrne, who also portrayed Pansy Parkinson in Harry Potter and Brittany in Lake Placid.

Season 7
Nora is a member of the Heretics, a group of witch/vampire hybrids, originating from the Gemini Coven. They were originally six Siphoners, a subsection of witches, all of whom were exiled for their inability to perform magic unless it was siphoned by another source, such as a supernatural being or a magical object. They were considered an abomination by the coven and were ultimately exiled sometime between the mid-late 19th century and early 20th century.

Nora is in a relationship with the fellow Heretic, Mary Louise.

Upon arriving in Mystic Falls, Nora and the others cause major trouble for the heroes and even crash Matt's ceremony, killing many of the attendants.

Eventually, Nora becomes an ally to the heroes and eventually is killed with help from Mary Louise.