Omg wait I thought that kid is Yamato but turns out the real Yamato is taller than maru???

I was thinking the same thing, i got so confused at first, it also seems the "god" that they gave the medicine might be tokio.

Hmmm, Yamato mentioned another name so maybe it's not tokio because if it were tokio it wouldn't have played out that way *me thinks*

I think the "god" its tokio and its confirmed on the latest chapter, first from the beginning the kids yamato and maru look like her. We still we dont know why she seems so emotionless, maybe it has to do something with the medicine or emotions are what makes them monsters (just my theory)