Olivia, played by Phina Oruche, is a character in the television series Buffy the Vampire Slayer.
Olivia is an old friend and romantic interest of Rupert Giles who appears in Season Four. Although she lives in England, Olivia visits Giles on two occasions. She is first introduced in "The Freshman" and is in Sunnydale during the events of "Hush". In "Hush", she shows artistic talent by drawing an accurate portrait of a Gentleman. At the end of "Hush", Olivia reveals she is not comfortable with Giles' role in battling the forces of evil. She appears pregnant and pushing an empty baby stroller in Giles' dream during "Restless" but is otherwise not seen again on the show. She appears in three episodes directed by Joss Whedon that season and is mentioned in the fourth ("Who Are You").
Olivia returns in the comics where she is present at Giles' funeral. When Giles is resurrected in the body of a 12-year-old, Olivia refuses to rekindle their relationship due to the large age difference. However, they do sleep together again when Willow Rosenberg casts a spell that temporarily ages Giles to early adulthood.