Yumeko and Shinya

Disclaimer that I don't know Japanese at all so this is based almost solely on the visuals of chapters 163 - 164. But I just had a realization and if I don't share it I might actually go insane. I'm also still fairly new to the fandom, so forgive me if this is a theory people have already said.

OK, firstly so we see in 163 that there is a woman who Shinya appears ro be living with? At first, I figured she might be a family member of his, and I don't think it's stated what they are to each other so someone can tell me if it's actually said anywhere what their relationship is. In 164 it turns out she's one of the priestesses. And judging from Shinya's reaction, he didn't seem to know about any of this, which rules out the family member idea imo. So currently, I don't think these two are biologically related.

Secondly, let's look at the actual timeline of the series itself. Currently Shinya is 28 years old in his flashback. We learned in the IRA arc that the original dragon keeper tv show was 20 years ago. I don't know whether that's when it started, or when it was canceled. The real life invasion started 13 years ago from the start of the story. So there's a 7 year gap in between at the very least. This is all important, trust me.

Thirdly, we've finally seen the dragon priestesses. It wasn't shown in the panels posted on reddit earlier, but there is actually one last panel showing a very young girl with black hair as well. I fully believe this is the same girl we see in chapter 97. You know what I don't see? Yumeko. Considering the earlier time-line, I actually believe she hasn't been born yet. It could be that the priestesses just age differently, but I don't think so. And another thing I noticed that spurred this whole post is that they all have black hair. Every single one. Not a blonde head among them. But you know who DOES have blonde hair? Shinya. You know what two characters have so many physical similarities that I've seen people theorize that they're siblings? Yumeko and Shinya.

I think most of you see where I'm going with this, so now that I gave all the relevant info I'll be blunt. Is Shinya Yumeko's goddamn FATHER???????