The way I see this, Septieme isn't going to play the same game with people who think poison and assassination are fair. Doesn't make sense if she knows that they are going to screw her over in an instant.
What she probably would look for are poor saps like Alice or Machs. A crew of jolly idiots that'll fight tooth and nail for her if they happen to be on her side.
What is the value of someone willing to do this without fear or bullying? Of course, she has to give something in return- say a source of incriminating evidence or a royal kiss
Methinks her siblings will be in for a horrid shock in a few years time.