Bab 1974: We can see that

"Beelzebub, huh?" The more Rean and Roan heard about top-level experts' names, the more impressed they became. Once again, another name from the myths back on Earth appeared in the cultivation universe. The thing that really made things weird was that even Roan had only heard of those names there. In the other planets he worked, no such names existed.

'Just what does Earth have that a ton of coincidences like these happen?' Rean couldn't help but ask through their Soul Connection. 'I mean, the Soul Gem System also went there to take my soul, right? That's too precise. You've never talked about it before, but surely there were more souls in other parts of that half of the universe. They didn't even need to be humanoids. All living beings had souls. It could have been anything else.'