Kinu Himuro

氷室 キヌ, Okinu
A teenaged female ghost. First encountered by Mikami and Yokoshima as one of two ghosts causing chaos at a mountain hot spring Mikami ends up adopting her when she doesnt go to heaven after the end of the first mission in the manga. Eventually she ends up becoming the secretary and errand girl for Mikami and even develops feelings for Yokoshima. Source: Wikipedia