Board Thread:Theories/@comment-34485394-20191012083546

To You,(Eren) 2,000 Years From Now  -chapter 1

To You,(Ymir) 2,000 Years Ago -chapter 122

so Ymir wait for 2000 years untill Eren (attack titan) release him? well, i think the attack titan is the only one who can deny or ignore the king's command. which could mean that Ymir send him as her helper/liberator. 