Roxanne "Roxie" Richter ("Roxy" in the movie) is a major antagonist in the graphic novel Scott Pilgrim and its movie adaptation Scott Pilgrim vs. the World.
She is a member of the League of Evil Exes, and the only woman Ramona Flowers dated as her 4th ex. In the movie, Ramona says she only dated Roxy during her "bi-curious" phase and didn't count their relationship as "real".