"Well," she said, "most of us here are wanting to make a name for ourselves, you know. I'm sure that's a large part of why we came, because a big important project like this can make a career. So maybe it's someone who doesn't need the career boost that this job can bring - someone who is already established, at the top of his field."
An interesting idea. I was thinking about that when she added, "Of course, it would have to be someone who had a way of ensuring his own survival when the water became unusable."
"Me?" She laughed bitterly. "I'm not important enough to be first in line for one of the spirit capsules. And all the Death Flowers so far seem to be going into Gobias's pocket. Draw your own conclusions."
Why is she the only one that have the candidate of 'the saboteur'?
Anyway does it not sound like she is trying to make Ben suspecting 'the boss' and reverting the suspicion from herself?
If I have to guess, my guess Nadrena is the saboteur. Though to be sure we have see the next update problem flows.