User blog comment:Xilinoc/Everything but the Rain op. 9 - "June Truth"/@comment-1904799-20130508204453/@comment-1268838-20130508212714

Not really. The Shattered Shaft training certainly awoke his inner Hollow, but it has never been an adequate explanation as to how it developed in the first place. We know now that Hollowfication involves the insertion of a Hollow's soul, not just the transition of a soul into a Hollow.