I think it’s hard to call ‘souls’ a definite as like a ghostly thing or anything like that. In Wayhaven there is something in people, but it has more to do with magic and our connection to it. That’s what the Echo World would class as their ‘soul’.

Soulmates, in the Echo World, are just a known thing. Not always romantic, and not always just for one person. Sometimes it’s platonic soulmates, familial soulmates, but A LOT of the time it is romantic soulmates.

Again, it’s all to do with that connection to magic.

I won’t go too much into detail, partly because it’s something I might explore in future games, but also I haven’t got everything sorted for it yet.

Hope that helps though! Thank you so much for the ask :)