I daresay she's better than Madonna.

say what!? O_O.................just kidding :P

just wandering, from where she got neklace from 'arjuna'... o.o

The bead (made to resemble one half of the yin-yang symbol) is called a magatama. You can find them in several anime series, such as Ikkitousen. It's supposed to protect one against supernatural influence--logical, considering this woman is a supernatural investigator.