Board Thread:Manga/@comment-38849221-20190321163015/@comment-44026128-20191005022521

TKGriffiths wrote: It seems like a plot hole for now. Zeke implied something bad would happen if they touched, that's all we know.

Also I think Eren can't simply touch a person with royal blood to trigger the founding titan, they have to be in titan form. Otherwise he could just do it with Historia. Zeke transforming into his titan would give away their position. WRONG. Even in his human form, Eren was still able to use the power of the Founding Titan when he punched or touched the hand of Dina Yeager (in her titan form as the Smiling Titan).