Board Thread:Anime/@comment-24866429-20150719032335/@comment-35417358-20160628022756

CaptFredricks wrote: Yeah, what Manuel said. It's not yet been revealed if the Wall Titans are shifters, but most likely they aren't.

They are probably Titan shells that are discarded after the Titan hardens like Eren *Re-reads chapter 34* Welp, they're alive, probably shifters that volunteered to transform into titans or were random people that were forced to become walls (Which if you think about it, it sounds really weird). We haven't seen the Wall Titan appear since 2012, 4 friggen years!