<P> Early in their relationships, Amy was ambivalent and often condescending towards Penny and Bernadette, she later spends more time with them, even at the expense of her time with Sheldon . As her appearances have progressed, she has shed her strident, aloof personality for a stereotypically feminine and social one, although she retains some social awkwardness . Her feelings for Sheldon have also grown considerably over time, and she considers him to be ideal in almost every way, though she sometimes becomes as annoyed and frustrated by Sheldon's quirks as his other friends do . </P> <P> Amy also intensely wants her relationship with Sheldon to progress to include sexual intimacy, a drastic departure from her early days as a member of the circle of friends . She has come to consider Penny a very close friend, sometimes referring to her as her "bestie", occasionally admitting her entire social life revolves around Penny . Penny is fond of Amy, but to her dismay, Amy often fails to grasp the concept of "girl talk", by talking about feminine hygiene and anatomy when in her presence and at times being brutally honest . Amy also often demonstrates an infatuation towards Penny, occasionally bordering on physical attraction, and she has demonstrated a somewhat condescending attitude towards Bernadette, though still considers her a close friend . </P> <P> Amy can play the harp . In "The Scavenger Vortex", she mentioned that she attended Harvard University . In the final episode of season eight, "The Commitment Determination", Amy decides to take a break from her relationship with Sheldon due to the lack of physical affection . Sheldon had intended to propose to Amy, but she took a break from the relationship before he could ask her . Amy ultimately breaks - up with Sheldon after a serious disagreement, but they slowly rekindle their relationship and eventually have sex as a birthday present from Sheldon . </P> <P> When Sheldon's grandmother visits in season nine, she confronts Amy for hurting Sheldon and unintentionally reveals the secret engagement ring in his possession . Although Amy was initially shocked, she became really happy to know that Sheldon loves her enough to have considered taking that step forward in their relationship . Amy later prepares a surprise birthday party for Sheldon, which he has not previously celebrated with the group . </P>

What is the job of each star sister