Jokes aside, the fact that Chop-Chop is always on the same server... I expect that he is more than just a shopkeeper. I don't expect him to someone like the founder, but who knows, someone who's somewhat aware of the truth around Eternum like Idriel is.
Also I don't recall atm, but I believe no one besides the MC knows who Idriel is. The fact that his father barely cares about him, as well him not knowing who is mother is along him being the only one (so far) with 100% compability to Eternum... I dunno, but something doesn't add up. I wouldn't be surprised if Orion actually was born in Eternum, and probably from the race that saved Calypso antecessor (sorry I'm not recalling atm both names).
There are a lot of stories where humans from the MC's worls (for example
Return from the Undending Void) actually are the evil after some story plot reveals, so it wouldn't suprise me if Orion was actually sent to save his world from invasion by the humans on earth. The fact that even the governments accept Eternum as money really reinforces that.
My theory was already like several patches ago, and the more time it passes, the more I'm convinced that Orion or his mom at least aren't from earth... neither his dad is actually his dad.