Monica Geller altered the trajectory of the entire series, having life-changing effects on its characters. Summarizing the role of Monica in the series, Martin Gitlin wrote in his book "The Greatest Sitcoms of All Time" that while her friends "were ... just out to make the most of their social lives", Monica "sought to keep the others in line" while searching for "Mr. Right", who surprisingly turns out to be close friend Chandler. Several years before Monica and Chandler became romantically involved, Cox once joked in an interview that if her character were to ever have sex with another main character, it
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