Karen Davis (The Grudge)

Karen Davis (Sarah Michelle Gellar) is the main protagonist of The Grudge. She is an American social worker who moves with her boyfriend, Doug, to Tokyo. She volunteers to take care of a woman named Emma Williams when Emma's first caretaker, Yoko, does not show up to work. When Kayako Saeki, an undead woman bound to a curse, starts killing people around her, she starts investigating the curse's origin. She decides to head back to the house to keep Doug from falling to the curse, but fails. Karen then tries to stop the curse by burning down the house, but this instead releases the curse.

In the animated short film The Grudge 1.5, Karen is rescued by a young Chinese journalist, Eason, when he arrives to the house on fire to find Detective Nakagawa, saving her before they were attacked by Kayako. The two make it out alive and Karen is taken to the hospital.

The second installment reveals that Karen was hospitalized after the events of the first film. She is now paranoid, traumatized, and frantic to stop Kayako. She is visited by her sister Aubrey, who was sent by their mother. Later, Kayako resurfaces and grabs her arm; panicked, she frees herself and evades Kayako and the police. When she reaches the roof of the hospital, she backs away to the edge of the roof and Kayako pulls her off to her death.