Yurara Vol 3

Yurara Vol 3 by Chika Shiomi. A Shojo manga rated Older Teen, published in English by Viz Media in 2007.

Yurara Tsukinowa can see ghosts but keeps it hidden, until she transfers to a school where two classmates, Mei and Miyako, exorcise spirits. When Yurara is in danger, the protective spirit Yako takes over her body, and the three are drawn into supernatural cases together.