Board Thread:Manga/@comment-26056057-20160509020829/@comment-26932251-20160513192744

AhmedHadi1 wrote: Who could possibly be Zeke's father? As of yet unseen character.

Surprising twist... possibly a relative of the Reiss Family.

Also, I think he can only command titans that he himself created directly but he probably can't command titans that the Reiss family created or commanded at one point in time.

Also, it's speculation, but my guess is that Zeke came to Ragako posing as a doctor and tricked everyone into taking the serum at once.