Hectic - you betcha. This will be brief!
Demi - You Asked.
When Arithon and Elaira went into trance, they forged an energetic, empathic bond - by the fundamental truth of their Named being, tapped into each other to access the mysteries, and in so doing, dissolved their individual boundaries, one to the other. Anything that occurs, in linkage with the True Self (Named being) would translate through into physical manifestation. This means: they are energetically corded deeply enough that intense feelings, and some intense thoughts became empathic between them.
If one dies, the other will not be affected, except for the fact the partner would share awareness of the crossing (SPOILER!!! for PERIL's GATE – much as Arithon did, at Jieret's passing)
You will assuredly come to see more of what this means, and its impact upon both of them, in
Traitor's Knot.