Marnie Stonebrook

Marnie Stonebrook is the main antagonist of Season 4 of HBO's "True Blood". A powerful wiccan, Marnie conjures up the spirit of Antonia Gavilan and together in union the two begin wreaking havoc on all vampires. But when Antonia senses evil blossoming in Marnie she leaves and Marnie becomes the sole big bad.

She was potrayed by Fiona Shaw.