Beyond the emotional attachment, blankie also serves as teething relief (K-bao stuffs it into her mouth at every opportunity and bites ferociously), a sign of her love to her parents (she offers bei-bei to K-Pop and K-Mum when she feels particularly generous; after a few seconds, of course, she'll snatch it back), and general object of distraction (whenever she is about to launch into a tantrum about, say, not being allowed to play with the electrical outlet, we'll holler "Where is bei-bei?" and she will immediately forget what she wanted and go looking around for it).
As you can imagine, bei-bei takes quite a beating around the house and generally doesn't smell the best, so it needs to go into the washer not infrequently. This creates some anxiety for the K-folks because we never know when she'll start to bellow "Bei!" and grow inconsolable (which has happened already). We've hunted around Babies R Us online - the original retailer - for backups but so far haven't had any luck. Bei-bei came as a gift, in a pair with a second blankie in a different shade, but K-bao won't settle for ugly sister Leah.
Of course, K-Mum blames K-Pop, whom she accuses of carrying around a security blanket through junior high - a claim K-Pop vigorously denies.