Genevieve "Gigi" Savidge is a villainess from the Buffy the Vampire Slayer: Season 8 comic.
Lady Genevieve Savidge was a British noblewoman and an evil Slayer whose powers were activated by Willow Rosenberg. She was targeted by Rupert Giles due to her plans to usurp Buffy's place in the slayer hierarchy and ultimately end the world. He sent Faith Lehane to kill her.
Lady Savidge was guided by an Irish Warlock named Roden who was a servant of Twilight. With Roden she hunted and killed the slayers as part of her "training." However her and Faith realized that they had a lot in common both as slayers and as troubled women enticed by evil, despite their different lifestyles. Discovering Faith's treachery and tenuous affiliation with Buffy, she fought Faith to the death and was accidentally killed by an axe. At the same time Giles killed Roden. Her death affected Faith, causing her to want to find other slayers like Genevieve and guide them back to the side of good.