Board Thread:Manga/@comment-27125793-20190202152111/@comment-45749543-20200510183746

Up to this day I haven't heard any convincing arguments that Eren is the father. All the pros boil down to "I ship it, so he has to be the dad". Pulling another GoT on us would be cheap from Isayama and he's not cheap. It makes more sense that he would lead us on with saying he likes GoT, so that people are going to believe he's going to pull that, and then he makes a much better twist (like someone mentioned Levi could be the father - he is, after all, someone who does whatever needs to be done and he didn't treat Historia the best in the past, though I'm not going to advocate for that, just saying).

Imho it makes a lot more sense that the farmer boy is the father. Eren doesn't want any of his friends to inherit a titan, so why would he father a child to inherit one? He's also aware of Historia's feelings for Ymir, so it makes no sense to force her into pregnancy or think about a relationship with her, because he'll always be second best for Historia. As someone pointed out, he also clearly wanted to take his relationship with Mikasa a step further. It's obvious Mikasa and Armin are still his most important people, hence why he tried so hard to chase them away in 112 (to keep them from harm in the upcomming battle). The rest of the 104th are a close second, but not as important as Mikasa and Armin. He still wouldn't mindlessly use them for his plan though. And then there's reality, where women generally don't get pregnant after having sex just once (although I'm aware fictions usually does it the other way around) and he really wasn't around much, nor is it likely they were able to spend time together alone anyway. Like, just having a quickie several days in a row in a hallway somewhere seems absolutely OOC for Eren.

From Historia's POV, it's nearly identical: she wouldn't mindlessly use any of her friends to father her baby, because she knows she won't be falling in love with them anytime soon and let's be honest, sex between friends is just awkward. She might've been persuaded by Eren to get pregnant, but I think she just made the decision on her own, because Eren, Zeke and the Military were unable to come to an agreement (hence why Eren was so pissed as Hanji). In that sense, it's way more likely she chose a random guy she knew. And besides, we know she spent a LOT of time on the farm, it might well be that she got at least somewhat fond of him (though she doesn't look very happy, so probably not). He probably fell for her and she said yes because she needed an heir anyway.

Would be funny if farmer boy actually is an Ackerman. Living on a farm, he has no reason to get into a situation that would stress him enough to awaken his powers. And Kenny would've spent some time over there while he was serving Uri (and to murder Historia's mother), for all we know farmer boy could be his son. It's a shame we only see farmer boy's back, because from that angle he does look a bit like Mikasa's dad, but then it's also a very generic look anyway. If, then, the Ackermans really are unable to inherit titans, and since they're outside the Founding's power, such a child would definitely be free. Though I'm just throwing this out there, not saying I have any kind of proof for this. Consider it a crack theory if you want.