Board Thread:General Discussion/@comment-30644093-20170510114236/@comment-31937823-20171108223944

RumpleRegina wrote: Hook's daughter is, for me, the Witch. She is the only one missing in Hyperion. She is prisoner in Belfrey tower. And Eloise is trapped in the tower too.

Actually, they haven’t explicitly said that Hook’a daughter is hidden in a tower, but I do agree with your theory.