Board Thread:Dark Souls II/@comment-2.223.169.191-20140325204725/@comment-25722073-20141119121407

If you defeat the Lost Sinner, 2 souls will be dropped: the Old Witch Soul and Soul of The Lost Sinner which may have been translated incorectly from japanese and the original name should have been The Forgotten Sinner (http://youtu.be/7HvCrnMZJCA?t=17m27s ).

Anyway, because of the 2 dropps in the game, I'm sure that the bug has the Lord Soul and in fact that thing could be the reincarnation of the Witch of  Izalith. As for the Lost Sinnter or Forgotten Sinner, I'm not sure but would love to know who she could be.