Board Thread:Manga/@comment-30064439-20161122154000/@comment-27321453-20161122155701

Maybe it's an apologetic letter.

It won't contain any info about her real past or Marley/Eldia because Reiner and Bertolt must've read it and if it had any info that'd prove useful to the walled Eldians, Reiner wouldn't've agreed to deliver it to Historia. He even begged Hanji and told her she had to give it to Krista as he sat limbless and knew Hanji was gonna attempt to execute him.