User blog comment:MrAnonymous/Was Naraku, Onigumo?/@comment-5761933-20121122193021

Onigumo fell in love with Kikyo while she took care of him when he was severly injured and couldn't move. Sometimes, she would talk to him about life outside the cave, and so Onigumo came to know about the Shikon jewel. One time, when Kikyo was away, Onigumo wished to become strong and let demons take his body as their body, becoming Naraku in the process. But, since he had so many demons inside him, he couldn't quite control their urges to kill Kikyo - since she was a miko. His other side though, was Onigumo and his heart. Therefore, Naraku both loved and hated Kikyo.