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.
Chandler: Just had me a little nubbinectomy. Yep! Two nipples, no waiting.
Monica: Wow. Just like Rachel in High School.
Monica: Come on! Come on, I was kidding! It was such an obvious joke!
Chandler: That was an obvious joke; and I didn't think of it. Why didn't I think of it? The source of all my powers! Oh dear God, what have I done!
Rachel: Daddy! Daddy listen to me! It's like all my life everyone's told me, "You're a shoe! You're a shoe! You're a shoe!" Well, what if I don't want to be a shoe? What if I wanna be a purse or a hat? No I don't want you to buy me a hat, I'm saying I am a hat. It's a metaphor Daddy!
Ross: You can see where he'd have trouble.