**************** POTENTIAL SPOILER EP 42 *************
Regarding Kouya, I have also got the impression he was a little bit older in Taiki arc, but as said by Shinkun, it was just an impression.
My guess is:
There was something right in the rebelion from Atsuyu. I think Enki has granted Kouya a second chance, may be a task to protect people in the Yellow See. Who knows??? It is just a guess.
If I am not wrong, En-ou was having trouble being accepted by eight of the nice province lords, even after 20 years, because none of them have been named by him. Only one of the Provincial lords was truly connected to him and able to assist him during the rebelion.
It seen that Atsuyu was not just trying to get the water banks, but was after something else.
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Now, it is just me or have someone else noted that the same messenger that went talk to En-ou about Atsuyu plans, has turned 500 years later into En-ou Council Leader?

I don“t remember his name by now, but he was very coraugeous. This has also lead me to think Kouya received some blessing from Enki, may be by order of En-ou hinself.
Anyhow, it is just a guess. Please no flames!
