At the end of *Artemis Fowl and the Last Guardian*,

>! the pulse from the second portal kills all fairies inside its radius.

However, even before that, both Artemis and Holly were convinced that it would most likely

>! also kill humans (Artemis had fairy magic in him, but even before that occurred to Holly she thought he’d die).

However, Juliet and Beckett are also

>! within the radius.

What happened to them after they were vacated by the berserks? The above strongly suggests that they’d die. Or maybe not? Either way, they are never again mentioned for the remainder of the book, which I find suspicious, since all other “important” people are explicitly accounted for.