I cant be left doodling

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I cant be left doodling
I'm usually pretty good at just going with the flow when it comes to Wakfu lore, since it's pretty complicated and a lot of stuff ties to the games, which I have not played.
But I got a question for the Dofus/Wakfu lore knowers.
So, there's Joris, right? Specifically Wakfu times Joris. And then there's Atcham and Kerub, who in Wakfu call Joris dad. But I just found out, that Kerub is also Joris' adoptive father. So, uh, what's the situation there? Is it similar to how Dally is kinda Goultard's dad (but not really because reincarnation does not mean literally the same person) and how he calls Elely and Flopin his little siblings? Is it timey-wimey or rebirth/reincarnation stuff or something else?
Edit: Answer acquired! And also Dofus movie watched! It was super good~
Joris at 10 when he met atcham and all the guy did was bitch and walk around