10th Anniversary Amano key art [6.5+ Spoilers?]

[Elissar]

Destroyed isn't quite correct - her soul dissolved and sublimated into aether, removed from the cycle of reincarnation.
There's Buddhist imagery there.

I think the problem is that we don't have a confirmation where/how she is now. The animation used is the same as used for Emet, Hythlodaeus and Themis. They did like Nanamo or Zenos "Yep, it's gone, forget about it".
In any case, your interpretation of leaving the cycle of reincarnation seems perfect.