I'm quite surprised noone has discussed Laranthir yet. Was he still Almorra's second-in-command by the time of Whisper in the Dark? If so, he should be the next leader of the Vigil.
In the story I get the impression that Jhavi could well take this place, but maybe she is just supposed to take over the keep.
Is Laranthir still part of the story, or did he resign sometime ago offscreen? If he's still around, he should return to the limelight very soon.