User blog comment:Speculation no Kyojin/Episode 25 - The Titan in the wall/@comment-99.14.162.220-20130930020725

On the idea that the Titan Shifters in the wall (should they actually be Titan Shifters, though I can't imagine how they wouldn't be) being alive.... that's entirely possible seeing as (For those who haven't read this far in the manga or only watch the show I suggest you stop reading this comment because it contains spoilers.... not that I really care, but now you can't complain) Ymir was a titan for about 60 years and she's still only in her late teens physically. Going off of this logic I believe that should the Titan Shifters within the walls wake up, they would be the same age as they were when they made the walls in the first place. Now this is only speculation and should be taken at face value.

As for the ' they may have been put in the walls against their wills' part of this idea... I don't really see how that could work seeing as if humans at the time could have forced somewhere around, from my guess, several hundred-thousand Titan Shifters to turn into the walls, which they probably could've used to fight the Titans in the first place, I think that they might've been able to fight off the standard 17 meter class Titans that roam around outside the walls.

Personally I think that the Titans that make up the walls actually server to be more than just a physical wall that keeps out the rest of the Titans, but they server as a more..... intangible barrier. From the first episode/chapter I got that the Titans had stayed away from Wall Maria until the Colossal Titan and Armored Titan (I'm pretty sure everyone knows who they are by now so there's really no point in saying their names) broke it and let the Titans into the Shiganshina District and began the main plot of the series.

Yeah..... I'm going to be making an account pretty soon so its easier to do this. Either way what'd you guys think?