Kasumi is NOT a quori.  She has the essence of a renagae quori in her blood, but she is NOT one of these abominations!  They in turn are NOT followers of the Path of Light.  We are in fact, deadly enemies by heritage, and the Quori that joined her bloodline did not possess their hosts, but joined freely with them.  These Inspired of Riedra, are possessed by EVIL Quori, the very ones that the Path of Light wants to overthrow eventually.  With GOOD!