She constantly tries to upstage Barbie to the point of obsession, and you could argue that the only reason she wants Ken is because Barbie has him. Foe Yay: Raquelle and Barbie, at least on Raquelle's end.Raquelle, mostly for being a Fountain of Memes.
They also introduced such offshoot products as the Shnoggin Wrench and the Gold Schlond Poofa. Mattel took notice, and now has it cameo in various episodes.