There are three inhuman characters of which we don't know the destiny after the Thanos snap: Puck, Ivalera, and... Skull Knight. I fell like the first two have "survived" the snap in some way (retcon risk over there), but the third one is intriguing me the most. So close to Danan... is the SK immune to this link-breaking mess?
Let's just stop with the Thanos jokes because it's only going to confuse people. The elves aren't dead. As for the Skull Knight, I don't see why he would be affected, not to mention that he is able to literally cut through layers of the ethereal world as he pleases.