Meet Elsa

Sayid meets Elsa (not by chance), who works for an "economist." In the end, she shoots Sayid which leads Sayid to shooting her in a way very similar to the way Shannon was killed by Ana-Lucia (two shots in the abdomen).

Naomi and Elsa's bracelets

Here's the bracelets that Naomi and Elsa were wearing. We see that Naomi's has engraving that says "N, I'll always be with you. R.C."