Monica Geller terms of ethnicity, Crane confirmed that both Monica and Ross are half-Jewish, with their father being Jewish and their mother being of non-Jewish European ancestry. However, "Television's Changing Image of American Jews" categorized Monica as a "masked" Jew, explaining that "the smart, funny, and insecure Ross seems more Jewish" than Monica, who the author dismissed as "china-doll like" in appearance and demeanor. In his book "Encyclopedia of American Jewish History, Volume 1", author Stephen Harlan Norwood agrees that, unlike the show's male Jews, Monica's Jewish "markers" have been virtually removed. Although Monica and Rachel have remained best friends since high
Ross Geller grew closer to each other though the competition between them was still visible as seen in the season three episode, "The One with the Football". Ross often comes into conflict with his close friend, Phoebe Buffay. His rationality and Phoebe's eccentricity lead to conflict over evolution, gravity, and whether Phoebe's mother was reincarnated as a cat. It is also revealed that Phoebe once mugged Ross (stealing a copy of the comic book "Science Boy" that Geller had created) when they were teenagers. The two are roommates for a few weeks when a fire forces Phoebe to move into Chandler Bing