Hilda

Hilda was a vampire who formed a coven that consisted of Victoria, Anne, Heidi, Noela and Mary.

According to The Twilight Saga: The Official Illustrated Guide, she created the vampires out of pity for their lives. They lived happy lives until the Volturi accused them of drawing too much attention to the coven. Hilda allowed Aro read her mind to prove them wrong, however, he still confirmed that they were criminals. Hilda was then immediately executed.

She makes no appearance in the books or films whatsoever.