While Eren's Wall Titans do a great job at selling the massive scale, importance, and horror of Eren's decisions during these crucial episodes, their appearance has actually confused some fans. On Reddit, some fans have observed that because the Wall Titans all look exactly like the Colossal Titan (one of the Titan shifter powers currently wielded by Armin), fans aren't sure just how similar the two are. In particular, fans want to know if the Wall Titans can perform the Colossal Titan's trademark explosion ability, and whether or not Eren can regenerate them.
"I'm really confused about those wall titans," wrote u/Montezumawazzap. "They are the same one Armin controls right? So they can burst out heat but they need to consume their muscles in order to do that. So, how come they go underwater to the mainland while swimming and producing that much heat? Does Eren regenerate them or something?"
Unfortunately, these are all questions fans haven't received any answers to. As best as anyone can tell, either Eren does in fact regenerate them, or the fact that they are their own special kind of Titan indicates that they have regenerative abilities beyond the Colossal Titan. Either way, it's a question that fans will have to overlook for the time being — at least until Part 3 of the Final Season is finally released.
