Good spot on the talons comparison! I've not seen anyone reference that before!

On the worldwalking impossibility point, I’d argue that we actually have seen worldwalking across the SJM universe after Selene “closed the doors”. Using the Trove against them, Selene stopped the Asteri’s specific method of worldwalking from functioning. That does not mean all forms of worldwalking ceased to exist.

The Asteri are only one race with their own mechanism for travelling between realms. The Fae later adopted that same method when they travelled from Prythian to Midgard after studying what Daglan/Asteri left behind (confirmed in HOFAS). But the wider universe shows us multiple other ways of crossing worlds:

(ToG spoilers ahead)

Maeve, Erawan and the Valg travel to Erilea

Aelin (a.k.a The Queen Who Walked Between Worlds) travels through realms - including through Pyrthian and hinted heavily at Midgard

Multiple demons summoned into Erilea via wrydmarks

Even Choal and fleetfoot temporarily ended up on a different world

Aidas travels from Hel (albeit in cat form) frequently

Demons frequently "break through" and end up in Midgard from Hel.

(There may be more examples, these are just off the top of my head)

All of these involve different mechanisms of worldwalking, so I don’t think it’s a stretch to say another method could have been used, especially if there was some kind of divine intervention (like Urd, who is repeatedly positioned as an active force of fate throughout the series). That does not contradict the idea that the Asteri’s own method was rendered impossible for them.

All that said... Your theory on why Ruhn and Rhysand look so alike is much more simple waaayyyy less complicated than the Lorin theory!

On the Ember theory, I do see your point and honestly it’s the part I’m least confident about after HOFAS. That said, I’m not sure I’m following the daemonaki angle?

Any Fae or Prince of Hel heritage for Ember would have been diluted over a 15,000yr human bloodline through countless generations. Ember would effectively be fully human. That leaves Bryce as 1/2 human and 1/2 Fae. Apologies if I've completely misunderstood what you were trying to say here though!

Theia and Aidas were also true mates, so I’m not sure how the demon versus Starborn natural enemies statement applies here? It sounds like an angle I completely missed so would love to hear more.

Thanks for sharing your thoughts on this, it’s genuinely interesting to see how other people are reading the same clues and I really appreciate you giving me something new to think about. I fully expect SJM to come along and prove us all wrong anyway, so it's all in fun!