Rachel Green is Monica's best friend from high school and therefore a key member of the group of Friends.  Rachel stars off as a waitress at the Central Perk where the gang hangs out, but later becomes a buyer at Bloomingdale's.

Rachel dates Ross on and off throughout the series and the two eventually have a baby girl, Emma, at the end of season eight.

Rachel Green Quotes

Everyone I know is either getting married or getting pregnant or getting promoted, and I'm getting coffee! And it's not even for me!

Rachel

Oh! I see. And I've sort of been maintaining my amateur status so that I can waitress in the Olympics.

Rachel