So was it ever confirmed what would happen if the wall titans were to be exposed to the sun?
Obviously there's worry that they would begin the Rumbling, but the whole point is that they can't do that unless somebody commands them to hoof it. I guess there's a chance that they may start running wild and eating people, but again they were given pretty clear command by Karl Fritz to stay in place and their hardening may just be to disguise them from the mind-wiped Eldians on Paradis.
If in the event Eren cracked a good portion of the walls during his fights with Annie or Reiner, would the Wall Titans have just been like
Also why are they facing inward towards the cities instead of outwards?
Also also I'm kind of amazed they were able to march bc after 100 years of standing, their legs would have atrophied like prunes in the sun. Maybe that's why this dude was so unsteady