In the plot of the Apocrypha event you defeat rogue Apocrypha servants as raid bosses before they are resummoned under your side. Shakespeare, Avicebron, and Jack was defeated by your group on the first night and joined you the following day. During the second raid Shakespeare stayed at your base because he couldn't fight very well. After the second battle, Avicebron and Jack reported fighting rogue versions of themselves among the enemy servants. Your group is immediately alerted of the absence of Shakespeare on both sides. As you returned to the castle, Shakespeare had just fought off his enemy counterpart.