She looks plainly dead and they seem to be grieving her. It may be Jesus with the cross behind His head holding her spirit in His hands?
In the old iconographic tradition, plain haloes are used for saints and angels; Mary, if haloed, will have 3 little stars in her halo, or otherwise 3 stars depicted on her clothing; and Jesus will have the Cross in his halo, or the letters NIKE (yes, the same as the shoe!) which is the Greek word for "Victory."