Board Thread:Questions and Answers/@comment-29752445-20170527165653/@comment-29752445-20170527211737

Neilandio wrote: I suspect Reiner expected her to know that because the titans and their abilities are probably famous in Marley, but he didn't know Ymir had been trapped as a mindless titan for 60 years so she couldn't have known about the Beast titan's ability to turn people into titans that walk at night (the ability that Zeke discovered because of his royal blood).

That is true. even though the people in marley do not know Zeke is royal blood, since he keeps it a secret from them.

Also, was it ever answered why titans cannot move at night? what keeps them from being active during the night?