User blog comment:MrAnonymous/Was Naraku, Onigumo?/@comment-24218104-20120417011329

Onigumo was, in fact, in love with Kikyo. This could be seen from the very first time his story was mentioned. Out of greed and such, he gave up his body to demons and literally BECAME Naraku. It is often shown that Naraku wishes to get rid of his heart because it is Onigumo's heart, which still has lingering feelings of desire for Kikyo. Naraku even creates a detachment (Muso) that encounters Kikyo and has flashbacks of his feelings for her because he is actually Onigumo. Mind you, I haven't watched the series in a while, but I know all of this stuff is basically a summary for your answer. Hopefully it helps.