Monica Geller would eventually become popular staples of the show. Several months before "Friends" premiered, NBC had conducted a research report, the results of which determined that Monica was the only character to have been remotely well received by test audiences. When "Friends" first aired, critics initially perceived Monica – who was immediately established as the show's "mother hen" – and Cox as the series' main character and star, respectively. Critics have been largely receptive towards both Cox and her character; the "Los Angeles Times" holds Cox's acting responsible for disproving the stigma that attractive women are incapable of delivering comedic performances.
Ross Geller Ross's most significant relationship during the series. His attraction to her is established early on; Ross met Rachel through his sister Monica, who was Rachel's best friend in high school. He developed an unrequited crush on her, but never followed through on it. After leaving college, Ross married Carol, whom he had met at college, and had seemingly put his feelings for Rachel aside before he met her again in The Pilot. They have an on-again, off-again dynamic throughout most of the show. In the Season 1 finale, Ross has to go to China for his work so he asks